Posiflex CR-3103 - Manual (Page 7)

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P3 (DB25M) - Serial Input From Computer
2 - Receive data from computer
3 - Transmit data to computer
4 - RTS, Request To Send; from computer;(connected to 5)
5 - CTS, Clear To Send; to computer;(connected to 4)
6 - DSR, Data Set Ready; to computer;(connected to 8 & 20)
7 - Ground
8 - DCD, Data Carrier Detect; to computer;(connected to 6 & 20)
9 - Open-drawer indicator; collector of optical sensor (positive
end), conducting to pin 11 when drawer opened.
11 - Open-drawer indicator; emitter of optical sensor (negative
end), conducting to pin 9 when drawer opened.
Pin9 of P3
Pin11 of P3
18 - POS printer interface, pair with pin 25
20 - DTR, Data Terminal Ready; from computer; (connected to 6
& 8)
25 - POS printer interface, pair with pin 18
Note for Additional Features to RS-232C:
1. Open-drawer status of the drawer can be fed back to the
computer through the use of Pin9 and Pin11 as described above.
2. The simulation to CR-3100/CR-3200 can be achieved through
the use of Pin18 and Pin25 as described above. That is the Pin18
and Pin25 pair can be used as the input to solenoid in CR-
3100/CR-3200 without the need of the power adapter by
connecting this pair to POS printer output, then CR-3101~3/CR-
3201~3 will work the same way as CR-3100/CR-3200.
P4 (DB9F) - Pass-through Serial Output
2 - Transmit data to computer, connected to Pin3 of P3.
3 - Receive data from computer, connected to Pin2 of P3.
5 - Ground
(Pins 1,4,6,7,8,9 are connected to the corresponding pin in P5)
P5 (DB9M) - Pass-Through Serial Output
Same as P4