Connections tr-36 – Westermo TR-36 User Manual
Page 11
11
6614-2202
4
3
2
1
4
3
2
1
Leased Line
PSTN
RS-422/485
RS-232
LED Status Indicators
Connections
TR-36
Jack socket
Power
Position
Direction*
Description
Product
marking
1
In
AC: Neutral
DC: – Voltage
2
In
AC: Line
DC: + Voltage
To minimise the risk of interference, a shielded cable is recommended when the cable is located inside 3 m
boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this port. This earth-
ing point should have a low impedance connection to the conductive enclosure of the apparatus cabinet, or
similar, where the unit is built-in. This conductive enclosure should be connected to the earthing system of an
installation and may be directly connected to the protective earth.
PSTN
Position
Direction*
Description
Screw terminal*
2
In/Out
PSTN Transmit/ Receive
1
In/Out
PSTN Transmit/ Receive
* The PSTN screw terminals are shared with 2-wire Leased line