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15
2 - Electrical connections
2.3.7 OP4 ANALOGUE CONTROL OUTPUT (option)
B
2.3.8 SERIAL COMMUNICATIONS (option)
B
Galvanic isolation
500V~/1 min
0/4…20mA, (750 or 15V– max)
Galvanic isolation 500V
~/1 min
Compliance to the EIA RS485
standard for Modbus/Jbus
A Please, read the user
instructions on the
“M400 controller
MODBUS/JBUS protocol”
7
8
Load
7
8
mA OP4
2.3.6 ALARMS OUTPUTS
B
Fuse
Coil of the
load alarm contactor
3
4
OP1
Fuse
Coil of the
load alarm contactor
15
16
OP2
Fuse
Coil of the
load alarm contactor
13
14
OP3
e The outputs OP1, OP2 and OP3,
can be used as alarm outputs only
if they are not configured as con-
trol outputs.
Varistor for inductive load
24V
~ only