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Connection terminals
The device as the following connection terminals / LEDs.
F
A
B
C
D
E
Smart Infrastructure
I
(1)
(2)
(5)
(3)
(4)
D E
F
RS-485
H
M-Bus MASTER
(6)
(6)
(6)
(6)
(7)
(7)
(7)
(7)
E
Mains voltage AC 230 V.
Output for web server WTV676 power
supply (DC 24 V)
Connect the power supply (Vout LC) to the
level converter (Vin LC)
(do not use for other purposes)
Serial interface RS232 and RS485 to
connect to a PC or M-bus master
RS-232
RS-485
A = TX
D = REF
B = RX
E = D-
C = GND
F = D+
M-bus master connections for M-bus
devices or repeaters
D
A
(3)
(4)
(5)
A
B
C
RS-232
WTX631-GA0090
LEVEL CONVERTER
Run
TX M-Bus
RX M-Bus
Short Circuit
Overload
Power
Vin
LC
V
V
A
B
(8)
(9)
C
C
F
G
H
I
(1)
(2)
Power
230Vac
Vout
LC
V
V
A
B
(3)
(4)
M-bus slave connections to the M-
bus web server WTV676.. or to the
previous master level converter if
the level converter is used as
repeater.
Electrical grounding
Status-LEDs
Push button for firmware update
A6V11742346_en--_a
G
(4)
(5)
WTX631-GA0090
POWER SUPPLY
V
out
24Vdc
V
V-
+
(5)
(6)
B
11
2019-10-01
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