Westermo TR-36 - 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