Basic Documentation

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Siemens M-bus level converter and M-bus web server A6V11157985_en--_f
Smart Infrastructure Connections 2021-06-21
3.2 Level converter WTX631..
Level converter WTX631.. has the following connection terminals:
A Mains power AC 230 V F Connection to the M-bus web
server WTV676.. or to the
previous master level
converter, if this level
converter is used as a
repeater.
B Output for power supply level
converter WTX631..
(DC 24 V)
C Connection to the power supply with
the level converter/repeater
D Serial interface RS-232 and RS-485
to connect to a PC or M-bus master
G Ground
H State LEDs
I Button for firmware update
RS-232
A = TX
B = RX
C = GND
RS-485
D = REF
E = D-
F = D+
E Connections for M-bus devices and
repeater
(6)(6)(6)(6)(7)(7)(7)(7) (8) (9)
M-Bus MASTER
Vin
LC
(5) (3) (4) (3) (4)
ABC
RS-485
VA VB
(5)(1) (2)
DEF
RS-232
Run
TX M-Bus
RX M-Bus
Short Circuit
Overload
Power
WTX631-GA0090
LEVEL CONVERTER
(3)
(4)
(5)
(6)
V
out
24Vdc
(4)
V
+
V-
(5)
(1)
(2)
Power
230Vac
Vout
LC
VA VB
WTX631-GA090
POWER SUPPLY
A
B
CE
F
G
H
I
D
C