Westermo LD-64F - Manual (Page 9)

19 6073-2011
Connections LD-64F
Line connection
(5-position screw-terminal)
Direction Connection ITU-T V.11
nr. Description
Receiver 1 A’ (R+)
Receiver 2 B’ (R–)
Transmitter 3 A (T+)
Transmitter 4 B (T–)
5 Shield
1 2 3 4 5 L N
LD-64
RS-422/485 POWER
R+
Rx1
Rx2
Tx1
Tx2
R- T+ T-
TD RD C E PWR
OPTO LINK MONITOR
Ch1
C E
Ch2
Power connection
LD-64F DC
2-position screw-terminal
Screw Power-
no. supply
1 – Voltage
2 + Voltage
Power connection
LD-64F AC
(3-position screw-terminal)
Connection
Power
supply
L 115*/230 V
N AC power
PE/Protective Earth
* LD-64F 115 V
Power connection
LD-64F 110V DC
(3-position screw-terminal)
Connection
Power
supply
L + Voltage
N – Voltage
Not connected
The definations R+/R–,T+/T– can be various between
different manufactures.
Alarm signals
Upon failure the circuit between the con-
tacts ”C” and ”E” is closed. This circuit can
be used to generate an external alarm signal
by connecting an external relay as shown on
page 20. Please note that the maximum allow
voltage/current is 30 V/80 mA.