Instruction manual

APPENDIX C. SPECIFICATIONS
C-2
CONNECTION DETAILS
TABLE C-1. 25-Pin Male Connector Pin-out
Pin
No. I/O Name Description
1 GND Chassis Ground
2 out TXD SC932C transmits data on
this line
3 in RXD SC932C receives data on
this line
4 out RTS Held active by SC932C
7 GND Signal Ground
11 in PWR If held >3.5V will force
SC932C into high
power mode
20 out DTR Held high if ME is high (see
Appendix B)
TABLE C-2. 9-Pin Male Connector Pin-out
Pin
No. I/O Name Description
1 in +5V Regulated 5V supply
2 GND Ground
3 out RING Ring signal to datalogger
4 out RXD SC932C transmits on this
line
5 in ME Modem Enable
6 in SDE Synchronous Device
Enable/Print Enable
9 in TXD SC932C receives on this
line