Honeywell ULTRAKEY LITE HJC5000 - Manual (Page 49)

UltraKey Lite Controller Installation and User Guide
Document 800-07422 Rev A 49
08/10
Installing and Configuring a Serial Connection
Step 1: Connect to the UltraKey Lite Serial Port
Note For a list of accessories see Shipping Checklist on page 18 and for port
connections see UltraKey Lite Port Connections and Descriptions on page 19 .
Note COM1 (RS422) and COM2 (RS485) are configured using the controller LCD
menu and cannot be used at the same time. See
Table 4-1 below.
Table 4-1 Serial Port COM1 and COM2 Pin Assignments
Serial Port Type Pin Signal
COM1 RS422 1 RX +
2 RX –
5 GND
7 TX –
8 TX +
RS485 7 T/R –
8 T/R +
COM2 RS232 4 RXD
5 GND
6 TXD
RS485 1 T/R +
2 T/R –