Date printed: 24.01.12
79
D21m System
Connector Pin Assignments CTRL RS 422 / GPIO (9pin D-type, female, UNC 4-40 thread)
1
5
9
6
Solder/Crimp View
(or Socket View)
Pin RS422 Controller RS422 Device GPIO
1 Chassis Chassis +5 VDC, 200 mA max.
2 RxD – TxD – force to AUX
3 TxD + RxD + force to MAIN
4 GND GND GND
5 n.c. n.c. Relay contact (off = MAIN, on = AUX)
6 GND GND GND
7 RxD + TxD + force to AUX
8 TxD – RxD – force to MAIN
9 Chassis Chassis Relay contact (off = MAIN, on = AUX)
Inputs The inputs (pins 2/7 and pins 3/8) are completely independent and electrically
isolated. They may be used either with the internal +5 VDC supply voltage, or
with external voltages of 5-24 VDC, regardless of the polarity. Total current
supplied by the +5 VDC pin must not exceed 200 mA.
Output The output (pins 5/9) is a completely independent, electrically isolated relay
contact, closed if AUX is selected. Contact rating is 0.5 A for 125 VAC, 1 A
for 30 VDC, or 0.3 A for 100 VDC. The +5 VDC supply voltage or the ground
(GND) terminals, together with the relay contacts, may be used to generate
an output signal. Total current supplied by the +5 VDC pin must not exceed
200 mA.
MADI MAIN / MADI AUX (8pin RJ45)
(on twisted-pair cable version A949.0414 only)
1
8
Socket View
Pin Signal
1 MADI RxD +
2 MADI RxD –
3 MADI TxD +
4 WCLK TxD/RxD +
5 WCLK TxD/RxD –
6 MADI TxD –
7 reserved
8 reserved
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