CUE smartCUE Interfaces - Manual (Page 15)

15
smartCUE Interfaces | User Manual | Control Ports
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DIGITAL I/O
Digital I/O provide digital input as well as digital output. Each Digital I/O port can be used either as input or
as output.
Pull-up resistor 680 ohms is connected to +5 VDC. Digital input is rated 0 – 24 VDC, threshold is 2 V.
Voltage on I/O with open output transistor is approx. 4.3 VDC, because protection diode is connected in
series (0.7 V drop-down). Voltage on I/O for output switch on is approx. 0.6 V. Max. 24 VDC / 80 mA can be
switched by output transistor.
Schematic diagram
INPUT
value CLOSE (< 2 V) / OPEN (> 2 V)
OUTPUT
value CLOSE / OPEN
680 Ohm
+5 VDC
Input / Output
Common
10 kOhm
Connector pin out
DIGITAL I/O
5-pin 3.5 mm Pin Signal Description
S S G S S
1 2 3 4 G S Signal Input / Output Signal 1 - 4, 5 - 8
G GND Common ground for all I/Os