Sensoray 3011S - Manual (Page 6)

Fig.2. Optoisolated GPIO.
GPIO requires power (pins GPIO-VCC and GND) in the range of 3 to 5 VDC. The input
pin (GPI-A) is connected to an anode of an input LED via a 150 Ohm resistor. Input
diode’s current must be kept between 7 and 15 mA (with a forward voltage of 1.5 V). For
additional information on the optocoupler please refer to the documentation on Avago
ACSL-6210.
Table 1. GPIO and power terminal block pinout (left to right):
1 GPO-COL
2 GPI-A
3 GPIO-VCC
4 GPO-GND
5 POWER GND (-)
6 POWER +5 V DC
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