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Installation
The signal order and details are depicted and listed in the following figure and table:
Figure 15 – Serial Daughter board I/O connector and labelling
Serial Mode
PCB Label
Signal Direction*
Name
RS-232
CD
Input
Carrier detect (CD)
TXD
Input
Receive Data (RXD)
RXD
Output
Transmit Data (TXD)
DTR
Output
Data Terminal Ready (DTR)
0V
0V
Signal Ground
DSR
Input
Data Set Ready (DSR)
RTS
Output
Ready to Send (RTS)
CTS
Input
Clear to Send (CTS)
RI
Input
Ring Indicator (RI)
RS-485
A (-)
Bidirectional
B (+)
Bidirectional
0V
0V
Table 3 – Serial daughter board connector details | * Signal direction is with respect to the iRIS
The RS-232 and RS485 connections cannot be used at the same time. Which is currently being used is selected
by iRIS configuration via iLink.