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 +
2RX –
5GND
7TX –
8TX +
RS485 7 T/R –
8T/R +
COM2 RS232 4 RXD
5GND
6TXD
RS485 1 T/R +
2T/R –