VOLTCON_MED

## VOLTCON series 

Transmitter of photocurrent to 0 - 5 V signal 

## General Features 

**==> picture [19 x 12] intentionally omitted <==**

## **Properties of the VOLTCON** 

The VOLTCON converts a photocurrent into an output voltage between 0 and 5 V and can be connected to any PLC system. 

Four models with different measurement ranges are available. The amplification factor (gain) can be adjusted by a potentiometer. The measurement range can also be customized by replacing passive components (see description on page 2). 

## speciFications 

## **Parameter Value** 

Photocurrent measurement range VOLTCON_low 500 µA VOLTCON_med 5 µA VOLTCON_high 50 nA VOLTCON_flame 500 pA 

Supply voltage 7* ... 24 V (*usable down to 5V, but this is not recommended) Gain adjustment range ± 35% Dark output voltage < 1 mV Current consumption < 30 mA Dimensions 13 x 26 x 8 mm (WxLxH) Operating temperature -20 ... +80 °C Storage temperature -40 ... +80 °C Standards RoHS 2 2011/65/EU, DIN IEC 60381-2 

We strongly recommend to process this product on ESD protected workplaces. 

## connection 

1 - Photodiode anode 

2 - Photodiode cathode 

3 - Signal output (connect to current input) 

4 - GND power supply 5 - V+ power supply 

Gain - turn left to increase the gain 

**sg** lux GmbH | Richard-Willstätter-Str. 8 | D–12489 Berlin | Tel. +49 30 5301 5211 | welcome@sglux.de | www.sglux.de Rev. 2.4   Due to our strive for continuous improvement, specifications are subject to change within our PCN policy according to JESD46C. 

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## VOLTCON series 

## Transmitter of photocurrent to 0 - 5 V signal 

## customization oF measurement ranGe 

To modify the measurement range beyond the available adjustment range the feedback resistor Rf must be replaced. The adjustment range remains unaffected by this change. Imax is the designated maximum photocurrent to be measured. 

Rf,new (in MΩ) = 5 / Imax (in µA) 

The capacitor Cf defines the time constant t of the measurement and may need modification too. By default t is 10 ms for all models. The required value of Cf can be calculated from Rf,new and the intended time constant: 

Cf (in nF) = t new (in ms) / Rf,new (in MΩ) 

## **Recommended values:** 

10 kΩ < = Rf,new < = 3 GΩ and 1 ms < = t < = 200 ms, Cf,new > = 33 pF, 

components package size 0805 (2.0 x 1.25 mm) 

## **Default component values:** 

|**Model**|**Rf**|**Cf**|
|---|---|---|
|VOLTCON_low|10 kΩ|1µF|
|VOLTCON_med|1 MΩ|10 nF|
|VOLTCON_high|100 MΩ|100pF|
|VOLCON_flame|10 GΩ|1.5 pF|



The VOLTCON series works with other diodes if shunt resitance and juncion capacitance are comparable with sglux SiC photodiodes. Almost all UV and visible photodiodes are known to work while infrared detectors may not work as expected. 

**sg** lux GmbH | Richard-Willstätter-Str. 8 | D–12489 Berlin | Tel. +49 30 5301 5211 | welcome@sglux.de | www.sglux.de Rev. 2.4   Due to our strive for continuous improvement, specifications are subject to change within our PCN policy according to JESD46C.