EB-2724-030-0

## **Manual** 

## **The 24V single-channel circuit breaker system** 

**BLOCK Transformatoren-Elektronik GmbH** Max-Planck-Strasse 36–46 • 27283 Verden • Germany Tel. +49 (0) 4231 678-0 • Fax +49 (0) 4231 678-177 info@block.eu • block.eu 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——_——C~~ (€_«s'|sX ~~2~~ BLOCKt 

## **Contents** 

|**1.**<br>**General notes ......................................................................... 3**|
|---|
|1.1<br>Safety information .................................................................................... 3|
|1.2<br>Qualified staff .......................................................................................... 3|
|1.3<br>Intended use ........................................................................................... 3|
|1.4<br>Disclaimer ............................................................................................... 3|
|**2.**<br>**Product description ................................................................ 4**|
|2.1<br>Description of the full system ..................................................................... 4|
|2.2<br>Variant overview ...................................................................................... 5|
|2.2.1<br>Equipment ........................................................................................... 5|
|2.2.2<br>Item number system ............................................................................. 6|
|2.3<br>Communcation module ............................................................................. 6|
|2.4<br>Connectors and control elements ................................................................ 7|
|2.4.1<br>EB-27, EB-28 ........................................................................................ 7|
|2.4.2<br>EB-08, EB-18, EB-38 ............................................................................. 7|
|2.5<br>Operating conditions, signalling, reactions ................................................... 8|
|2.5.1<br>Operating conditions, normal operation signalling ...................................... 8|
|2.5.2<br>Start-up behaviour ................................................................................ 8|
|2.5.2.1<br>EB-27: .............................................................................................. 8|
|2.5.2.2<br>EB-28: .............................................................................................. 8|
|2.5.2.3<br>EB-08, EB-18, EB-38: ......................................................................... 9|
|2.6<br>Automatic addressing ............................................................................... 9|
|2.7<br>Undervoltage switch-off ............................................................................ 9|
|2.7.1<br>EB-27, EB-28 ........................................................................................ 9|
|2.7.2<br>EB-08, EB-18, EB-38 ............................................................................. 9|
|2.8<br>Accessories ............................................................................................ 10|
|2.8.1<br>Required accessories ............................................................................ 10|
|2.8.1.1<br>EB-BARx Power bus bar ..................................................................... 10|
|2.8.1.2<br>EB-COV Left side cover ...................................................................... 10|
|2.8.2<br>Optional accessories ............................................................................. 10|
|2.8.2.1<br>Communications module .................................................................... 10|
|2.8.2.2<br>EB-PMM Output distribution module ..................................................... 10|
|2.8.2.3<br>EB-GNDx 0V Ground distribution module .............................................. 11|
|2.8.2.4<br>Labelling options ............................................................................... 11|
|2.9<br>Functional circuit diagram ........................................................................ 11|
|2.9.1<br>EB-27, EB-28 ....................................................................................... 11|
|2.9.2<br>EB-08, EB-18, EB-38 ............................................................................ 12|
|**3.**<br>**Installation .......................................................................... 13**|
|3.1<br>Installation schematic diagram .................................................................. 13|
|3.2<br>Assembly ............................................................................................... 13|
|3.3<br>Connection ............................................................................................. 13|
|3.4<br>Using different model variants .................................................................. 14|
|3.5<br>Breakable housing parts ........................................................................... 14|
|3.6<br>Demounting ........................................................................................... 14|
|**4.**<br>**Technical data ...................................................................... 15**|
|4.1<br>Input ..................................................................................................... 15|
|4.2<br>Output ................................................................................................... 15|
|4.3<br>Tripping characteristics ............................................................................ 16|
|4.3.1<br>EB-27 ................................................................................................. 16|
|4.3.2<br>EB-28 ................................................................................................. 16|
|4.3.3<br>EB-08, EB-18, EB-38 ............................................................................ 16|
|4.4<br>MTBF ..................................................................................................... 17|
|4.5<br>EMC, safety ............................................................................................ 17|
|4.6<br>Environmental conditions ......................................................................... 17|
|4.7<br>Dimensions, weights ................................................................................ 17|



Page **2** of **18** 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——_——C~~ (€_«s'|sX ~~2~~ BLOCKt 

## **1. General notes** 

## **1.1 Safety information** 

Please read the warnings and safety information carefully before using the device. The unit must only be installed by qualified staff with the right expertise. If malfunctions or any damage should occur, turn off the supply voltage immediately and mail the unit to us for inspection. The unit does not contain serviceable parts. If an internal fuse trips, this is most likely due to an internal defect. The information given is only for the purposes of describing the product and is not legally binding. 

## **1.2 Qualified staff** 

The product associated with this document should only be handled by qualified staff who make use of the relevant documents for the task - especially any safety instructions or warnings. Due to their training and experience, qualified staff can ensure that the product described here is used in compliance with all safety requirements and all applicable regulations, provisions, norms and laws. 

## **1.3 Intended use** 

This unit is suited for installation into the housing of general electrical devices such as industrial controllers, office devices, communications devices or measuring devices. Do not use this device in the control systems of airplanes, trains or nuclear facilities, where a malfunction could lead to serious injury or fatalities. 

## **1.4 Disclaimer** 

The contents of this document was compiled with the greatest care to ensure it reflects the described hardware and software. Nevertheless, deviations between the product and document may occur. Such deviations may be due to the product’s continuous development. 

We are therefore unable to guarantee that the document matches the product in every regard. If this document should contain errors, we reserve the right to make corrections without notice. 

Page **3** of **18** 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——_——C~~ (€_«s'|sX ~~2~~ BLOCKt 

## **2. Product description** 

## **2.1 Description of the full system** 

The EasyB single-channel circuit breaker series are available both with and without current limiting. For comprehensive system monitoring, we also offer variants that connect to an EasyB communication module, which interfaces with a higher-level control system. The modules can be combined as required, depending on the application and number of the intended channels. When we developed the electronic circuit breaker, the aim was to create a particularly flexible system. For this reason, you can run the circuit breaker units individually or stacked to form an electrical as well as mechanical, functional system. The 24V supply enables up to 40A of current to flow through the power contact of your chosen circuit breaker channel. If you require a stronger current, you can add more power contacts. The current is distributed to the individual fail-safe channels via a universal power bus bar that can carry a current of up to 80A. The resulting setup is suitable both for protecting smaller facilities and their smaller load circuits as well as large facilities, where you may need to secure up to 40 circuits. 

When setting up the system, the builder can mount the required circuit breaker module on a DIN rail, depending on the application. This automatically connects the signal contacts as well, ensuring a fast and easy installation. The advantage of the 1-channel concept is that you match the system size to the current need, which you can still extend later. If each circuit breaker channel has more than two electric loads to service, there are output distribution modules available with eight further outputs each. You can connect up to three of these output distributors to each of these circuit breaker channels, ensuring a maximum of 24 further output contacts. 

If you require the potentials to combine when returning to the power supply, you can do so easily and quickly using the EB-GNDx modules. 

The standard 12mm-wide electronic circuit breakers offers different possibilities for communications: A message output can retrieve a collective message from all connected modules, enabling the monitoring of up to 40 stacked circuit breakers. There are further variants available for a comprehensive evaluation, which can interface with the fieldbus level together with an equally daisy-chain-able communication module, offering up both dynamic data like channel status, actual current and input voltage as well as static data like series number and nominal current. This means you can, for example, set the nominal current of a module digitally. Given that one module can cover all nominal current values, less storage space is required. When you switch them on, the channels find their addresses automatically, meaning no more time-consuming manual address allocation. 

Page **4** of **18** 

~~PO~~ Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——| BLOCK~~ 

## **2.2 Variant overview** 

The circuit breakers can be divided into three groups, depending on their type of protection and their functionality: 

EB-27: Electronic circuit breaker with thermomagnetic characteristic and status signal relay for tripped and turned off channels to adjacent channels. Entry-level variant for electronic protection of 24V loads. 

EB-28: Electronic circuit breaker with current-limiting characteristic and status signal relay for tripped and turned off channels to adjacent channels. Entry-level variant for electronic protection of 24V loads, if an active current-limit is required. 

EB-08, EB-18, EB-38: Electronic circuit breaker with current-limiting characteristic and comprehensive communication with adjacent modules. Suitable for advanced protection of 24V loads and the ability to actively control detailed power supply parameters and channels. 

## **2.2.1 Equipment** 

**Figure 2-1: Equipment overview** 

Page **5** of **18** 

~~Po~~ Manual ENG HB-20160728 ~~oy~~ 

**Electronic circuit breakers EASYB** 

## **2.2.2 Item number system** 

**Figure 2-2: Item number system** 

## **2.3 Communication module** 

Communication modules enable communication between the electronic EasyB-circuit breaker system and the higher-level control system (PLC, PC). Different communication modules are available/being developed to ensure compatibility with different and widespread bus systems and communication standards. Some of the modules offer additional contacts such as a group reset input and multiple potential-free group message contacts. 

To connect the communication module, mount it on the left side of the circuit breaker. The use of multiple communication modules with one circuit breaker connection is not permitted. 

For more detailed information on each communication module, go to the downloads section of the relevant communication module on the BLOCK homepage www.block.eu. 

Page **6** of **18** 

~~fF~~ Manual ENG HB-20160728 ~~Cd~~ 

**Electronic circuit breakers EASYB** 

## **2.4 Connectors and control elements** 

## **2.4.1 EB-27, EB-28** 

**Figure 2-3: Connectors, control elements EB-27, EB-28** 

## **2.4.2 EB-08, EB-18, EB-38** 

**Figure 2-4: Connectors, control elements EB-08, EB-18, EB-38** 

Page **7** of **18** 

~~PO~~ Manual ENG HB-20160728 ~~=~~ 

**Electronic circuit breakers EASYB** —C*tsC ~~S~~ CBLOCKE 

## **2.5 Operating conditions, signalling, reactions** 

## **2.5.1 Operating conditions, normal operation signalling** 

## **2.5.2 Start-up behaviour** 

## 2.5.2.1 EB-27: 

As soon as the input current reaches the turn-on threshold of 17.5V ± 0.7V, the channels will turn on after an initialization period of around 27ms. Each channel acts on its own and switches on independently of the other connected channels. 

- 2.5.2.2 EB-28: 

See 2.5.2.1. The module initialization period is around 52ms. 

Page **8** of **18** 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——_——C~~ (€_«s'|sX ~~2~~ BLOCKt 

## 2.5.2.3 

EB-08, EB-18, EB-38: 

When the circuit breakers are stacked, it creates a communicative chain. When the supply voltage is applied and reaches a turn-on threshold of 17.7V ± 0.7V with a slew rate of at least 8V/s, channel 1 (far left) turns on after an initialization period of 52ms. Channel 2 is located to the right of channel 1 and turns on after 85ms, when the current flowing in channel 1 is smaller than the nominal current. If the current in channel 1 should exceed the nominal value, the turning on of channel 2 is delayed until the current in channel 1 is smaller than the nominal value. Only then is channel 2 turned on with a delay of 85ms. If the current in channel 1 continues to be lower than the nominal current, channel 2 is turned on after a maximum waiting period of 5 seconds. 

This process is repeated with any subsequent channels. Only then is the signal contact “OK” set. 

## **2.6 Automatic addressing** 

The circuit breakers with extended communication characteristics (EB-08, EB-18, EB-38) are automatically addressed when the power supply is turned on. A visual process is used here, where the installed modules are allocated a number in a sequence, one after the other. The module furthest to the left is allocated number 1. The time sequence is described in section 2.5.2.3. For a reliable address allocation process, it is necessary to ensure that all stacked circuit breakers are supplied with current simultaneously. 

## **2.7 Undervoltage switch-off** 

- **2.7.1 EB-27, EB-28** 

If the operating input current falls below the turn-off threshold of 16.7V ± 0.7V, the circuit breaker channel turns off and blocks the current. Each channel acts independently and due to tolerances they each have a slightly different turn-off voltage. 

When turning on again, if the turn-on threshold is exceeded (section 2.5.2), the last status is produced again. 

## **2.7.2 EB-08, EB-18, EB-38** 

If the input voltage of the communicating circuit breakers sinks below the turn-off threshold of 17.45V ± 0.7V, the channels with a current exceeding 100% of the nominal current are initially turned off with a memorized protection characteristic. The turn-off process is carried out one channel at a time. The intermediate delay time for this is 16ms. 

If the input voltage continues to sink, the remaining channels are turned off. 

Page **9** of **18** 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~—— _———si|s sC2BLOCKY?&~~ 

## **2.8 Accessories** 

## **2.8.1 Required accessories** 

## 2.8.1.1 

EB-BARx power bus bar The EB-BARx power bus bar enables the supply voltage to be passed on through all modules that are stacked. Its current carrying capacity is 80A. The standard option power 

bus bar is 492mm long and can connect 41 modules. We also offer shorter power bus bars, if required. 

2.8.1.2 EB-COV left side cover The EB-COV left side cover acts both as a cover and protector against unintended connection with the contacts exiting the modules on the left. 

## **2.8.2 Optional accessories** 

2.8.2.1 Communications module 

A range of communications modules are available/being developed to connect the communications-ready EasyB circuit breaker channels to higher-level control systems. The communications modules are stacked on the left via the circuit breaker connector. 

For more detailed information on the individual communications modules, go the products page on www.block.eu. 

## 2.8.2.2 EB-PMM output distribution module 

If you require more output contacts than are available on the circuit breaker channel so as to distribute output current, you can connect up to three EB-PMM output distribution modules on the right of the circuit breaker channel. This offers up to 24 additional output contacts. The connection between the output distribution module and the circuit breaker channel happens automatically. 

Page **10** of **18** 

~~PO~~ Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——_.__~~ __—C(C|_ ~~| BLOCKS~~ 

2.8.2.3 EB-GNDx Ground distribution module 

The EB-GND4 and EB-GND8 modules act as a 0V 

collective terminal with four or eight contacts. The 

2.5mm² contacts can carry up to 10A. This amounts to 

a total maximum current of 40A. The current is 

distributed via EB-BAR power bus bar and can then be led back to the supply power via the 16mm² contact of the EB-GND4. 

## 2.8.2.4 Labelling options 

The EasyB modules are labelled with standard 5 or 6mm labels. 

## **2.9 Functional circuit diagram** 

## **2.9.1 EB-27, EB-28** 

**Figure 2-5: Functional circuit diagram EB-27, EB-28** 

Page **11** of **18** 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~—————i‘~~ C;TC(*NS#«é ~~B~~ LOOCOKSS 

## **2.9.2 EB-08, EB-18, EB-38** 

**Figure 2-6: Functional circuit diagram EB-08, EB-18, EB-38** 

Page **12** of **18** 

Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——.....—Ci|s~~ 

## **3. Installation** 

## **3.1 Installation schematic diagram** 

**Figure 3-1: EasyB schematic diagram** 

## **3.2** 

## **Assembly** 

The unit should be mounted to the TH 35-15/7.5 standard mounting rail (EN 60715). Ensure the unit is fitted such that the ventilation slots sit above and below. Keep a minimum distance of 30mm between above and below. Additional modules are slotted on from the side. The secure positioning and connection is ensured by a tongue and groove system. The left module on the left housing side requires the EB-COV covering. 

## **3.3 Connection** 

The cable dimensions should be selected according to the maximum input and output current. The permitted cable sizes can be viewed in figure 2-3 and figure 2-4. Connect the +24V supply voltage to the feed-in terminal. The +24V 

**==> picture [59 x 43] intentionally omitted <==**

**----- Start of picture text -----**<br>
Page  = 13 ~>"  of  18<br>**----- End of picture text -----**<br>


Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~——__—C(~~ €._“—i|:s ~~«~~ XCBLOCK 

supply voltage is bridged over all modules via the EB-BAR power bus bar. The additional signal connections are automatically bridged through the stacking. Use multiple feed-in terminals for currents of >40 A. Select and configure the feed-in terminals such that the current in the power bus bar does not exceed 80A. 

## **3.4 Using different model variants** 

It is possible to connect circuit breaker channels with different model variants. Ensure that the communication capacity of the circuit breaker (EB-08, EB-18, EB-38) is deactivated when connecting to circuit breakers of model variants EB-27 and EB-28. Only the group status signal function should be active. 

## **3.5 Breakable housing parts** 

On the underside of the housing there are two plastic components, which even light tugging can break off. The lower part is designed to close the housing aperture of the crossconnector on the module to the right. The upper breakable part is designed to close off the current selector aperture of the EB-08. 

## **3.6 Demounting** 

Remove the EB-BAR power bus bar and all connected cables from the EasyB module you wish to dismantle. Use the release tab to disconnect the module from the connection. 

Page **14** of **18** 

Manual ENG HB-20160728 

**Electronic circuit breakers EASYB** 

## **4. Technical data** 

## **4.1 Input** 

|||EB-2724||EB-2824<br>EB-1824<br>EB-0824<br>EB-3824|
|---|---|---|---|---|
||Rated input voltage|||24V|
||Input voltage range|||18 - 30Vdc|
||Maximum residual ripple<br>of the input current|||3%|
||Turn-on threshold|17.5V ± 0.7V|17.5V ± 0.7V<br>17.7V ± 0.7V||
||Turn-on period|27ms||52ms<br>min. 52ms; see 2.5.2.3|
||Turn-off threshold|16.7 ± 0.7V|16.7 ± 0.7V<br>17.45 ± 0.7V||
||Maximum continuous current per<br>contact(0)|||10A|
||Maximum continuous current per<br>contact(In +)|||40A|
||Overvoltage protection|||33V|
||Power dissipation idle @ 24V|0.3W||0.5W<br>1.17W|
||**4.2**<br>**Output**||||
|EB-2724<br>EB-2824<br>EB-1824<br>EB-0824<br>EB-3824<br>Rated output voltage<br>24Vdc<br>Rated output current<br>see section 2.2.2<br>Current limiting<br>-<br>1.25 x INominal current<br>Maximum voltage drop between<br>input and output<br>< 140mV (10A)<br>Module initialization period<br>27ms<br>52ms<br>Turn-on delay of channels<br>-<br>Load-dependent, min.<br>85ms,max. 5s<br>Waiting period after turning off the<br>output(thermal stress relief)<br>500ms (short circuit) - 5s (overload)<br>Maximum power dissipation<br>< 1.2W<br>< 1.8W<br>< 2.5W<br>Maximum load capacity per output<br>(@24V)<br>> 40mF<br>> 70mF<br>Integrated output fuses<br>15AT<br>Feedback stability<br>max. 35V<br>Parallel connection of outputs<br>Not permitted<br>Series connection of outputs<br>Not permitted<br> ~~=~~|||||
|||||Page**15**of**18**|



Manual ENG HB-20160728 ~~——_~~ 

## **Electronic circuit breakers EASYB** ~~__—C*|sSCBLOCKE~~ 

## **4.3 Tripping characteristics** 

**4.3.1 Figure 4-1: Tripping characteristics EB-27** 

**==> picture [10 x 98] intentionally omitted <==**

**----- Start of picture text -----**<br>
Tripping time / ms<br>**----- End of picture text -----**<br>


**==> picture [93 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output current / A<br>**----- End of picture text -----**<br>


## **4.3.2 EB-28** 

**==> picture [11 x 88] intentionally omitted <==**

**----- Start of picture text -----**<br>
Tripping time / s<br>**----- End of picture text -----**<br>


**==> picture [97 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output current / A<br>**----- End of picture text -----**<br>


**Figure 4-2: Tripping characteristics EB-28** 

## **4.3.3 EB-08, EB-18, EB-38** 

**==> picture [11 x 88] intentionally omitted <==**

**----- Start of picture text -----**<br>
Tripping time / s<br>**----- End of picture text -----**<br>


**==> picture [97 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output current / A<br>**----- End of picture text -----**<br>


**Figure 4-3: Tripping characteristics EB-08, EB-18, EB-38** 

Page **16** of **18** 

Manual ENG HB-20160728 

**Electronic circuit breakers EASYB** 

**4.4 MTBF** EB-2724 EB-2824 EB-1824 Mean Time Between Failures > 500.000 h at 40°C, nominal load 

|EB-2724|EB-2824|EB-1824|EB-0824<br>EB-3824|
|---|---|---|---|



**4.5 EMC, safety** EB-0824 EB-2724 EB-2824 EB-1824 EB-3824 Norm for safety EN 60950-1, EN 50178, EN/IEC 60204-1 CE In accordance with 2014/30/EU (EMC directive) Safety class III Degree of protection IP 20 EMC interference immunity EN 61204-3 EMC emitted interference EN 61204-3 ~~==~~ **4.6 Environmental conditions** EB-0824 EB-2724 EB-2824 EB-1824 EB-3824 Ambient temperature up to 6A -25°C … +70°C nominal current Ambient temperature 8A nominal -25°C … +60°C current Ambient temperature 10A -25°C … +55°C nominal current Storage temperature -25°C … +85°C Degree of pollution II Humidity 5 ... 96%, no condensation Climatic category (EN 60721) 3K3 ~~==~~ **4.7 Dimensions, weights** 

||EB-2724|EB-2824|EB-1824|EB-0824<br>EB-3824|
|---|---|---|---|---|
|Dimensions|see figure 4-4||||
|Weight|39g|40g|42g||



EB-0824 

Page **17** of **18** 

## Manual ENG **Electronic circuit breakers** HB-20160728 **EASYB** ~~————.....~~ ....._._—_—|:« 

**Figure 4-4: EasyB dimensions** 

Page **18** of **18**