Rose Electronics Porter - Manual (Page 36)

32 PORTER INSTALLATION AND OPERATIONS MANUAL
Serial Model with / 422 option
Pin Signal Name Direction Description
1 Chassis Ground Common Connect to cable shield or equipment frame
2 TXD - Output Inverted transmit data out
3 RXD - Input Inverted receive data in
4 DTR - Output Inverted handshake signal; high when ready
5 DSR - Input Inverted handshake input; drive high when ready
7 Ground Common Logic ground
15 TXD + Output Positive transmit data out
16 RXD + Input Positive transmit data in
17 DTR + Output Positive handshake signal; low when ready
18 DSR + Input* Positive handshake input; drive low when ready
* = If hardware handshake is not used, connect this line to pin 7 (Ground)