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Installation
Figure 10 – Pull-Down Mode Circuit
Figure 11 – Switched 12V Mode Circuit
2.3.4
Serial Sensor Interface (SSI)
The sensor serial interface is a three-wire serial port intended to be used with serial based sensors.
It can operate as either RS-232 or RS-485 signalling.
Terminal Label
RS-232
RS-485
STX
RS232 transmit
RS485 T+
SRX
RS232 receive
RS485 T-
GND
Signal GND
N/A
Table 1 – SSI terminal definition
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2.3.4.1
Selecting Serial Mode
The choice of RS-232 or RS-485 modes must be made in both physic jumper selection and firmware configuration
selection. Please see section
for more details on configuring the firmware mode.
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.
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