Westermo MA-44 AC, Installation Manual

Page: 13 / 22

13 6044-2002
Line connection
Transmission range (interface 2)
Use twisted pair cable. Max transmission range 1200 metre.
(cable specifications 0.3 mm
2 and capacitance 42 pF/m).
The transmission range will increase if a cable with lower capacitance and larger
diameter is used.
Use shielded cable in heavy industrial environments.
1) If shielded cable is used, connect the shield only at one end to avoid ground currents.
Twisted pairs
A’
B’
A
B
Transmitter
Receiver
MA-44
Receiver
Transmitter
Shield
1)
1
2
3
4
5
3
4
5
A/A’
B/B’
Transmitter/
Receiver
A/A’
B/B’
MA-44
Transmitter/
Receiver
2-wire 4-wire
Twisted pairs
RS-422
equipment
A
B
A’
B’
RS-485
equipment
Shield
1)
MA-44 DC
Specifications
Power supply 12–36 V DC
Power consumption
Max 2W
Insulation
1 000 V
Fuse F1
1.6 A fast 5x20 mm
All other specifications according to MA-44 AC
Switch settings
According to MA-44 AC
Connections
According to MA-44 AC, except power supply
Connection
no.
Power
supply
1 + Voltage
2 – Voltage
3
1 2 3 4 5
V.24/RS-232-C
CONNECTION
LINE
CONNECTION
1 2 3
POWER
12-36VDC