User's Manual

µLink System Manual 862-01545
Page 44 Issue 1b
Table 8. IU Rear Panel: Controls, Indicators and Connectors
Item Description
Outdoor Unit Cable
Connector
26-pin, High Density D-type female connector for
IU/OU interconnection cable.
Wayside Traffic
Serial Data
Connector
9-pin D-type female connector. Used for Wayside
traffic channels.
DC Power Connector Weiland 2-way chassis mounted connector.
Auxiliary I/O
Connector
15-pin, High Density D-type female connector.
Used mainly for diagnostics and maintenance
purposes. Divided into two main sections:
• Plant Alarm Inputs
• Equipment Control Relay Outputs.
On/Off Switch Power switch to switch the IU On or Off.
AC 3-pin Power
Connector
Chassis mounted IEC AC Inlet. Accepts 100 VAC
to 240 VAC.
Earth Stud Screw type terminal for earth connection.
Payload Data
Interface Connector
The connector types depend on the type of Data
Interface module installed. Available options are:
E1 (120Ω/75Ω RJ-45/BNC), T1 (100Ω/75Ω RJ-
45/BNC).