User Manual

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Siemens Building Technologies Product data sheet WZC-P60 CE1N5382en
Landis & Staefa Division 23.02.2000
Technical design
As a signal converter, the WZC-P60 converts RS-485, RS-232 or optical signals to M-
bus signals. The signals between input and output are galvanically separated by means
of optocouplers.
As a bus driver, the WZC-P60 supplies a maximum of 60 M-bus devices with the bus
zero-signal current. The M-bus output of the signal converter is protected against short-
circuits.
Power is supplied via an external power pack.
The M-bus signal converter indicates the type and direction of data flow by means of
LEDs.
LED Name Status Data flow
LED 1
(green)
ON On
Bus voltage present, WZC-P60 master in
idle state
Flashing
Bus voltage present, WZC-P60 master is
sending
LED 2 (yel-
low)
SLAVE On Slave is sending
Off Slave in idle state
LED 3 (yel-
low)
MAX On Bus zero-signal current exceeded
LED 4 (red) SHORT Flashes at
2 Hz
Overcurrent
Mechanical design
The M-bus signal converter is of compact design.
The front carries the LEDs, the optical interface and a DB9 socket.
At the top of the casing, there is a terminal block with three pairs of terminals for con-
necting the M-bus. At the bottom, there are the connection terminals for the power sup-
ply and the RS-485 and RS-232 port. The connection terminals can accept two wires
(1.5 mm
2
).
The rear carries the facility for rail and wall mounting.
Engineering notes
The local regulations for electrical installations must be complied with.
Power must be supplied by an isolation transformer which meets the SELV require-
ments for powering devices of safety class III.
For the design and engineering of the M-bus system, refer to the Basic Documentation
CE1P5361en.
Mounting notes
The rear of the casing has a facility for fitting the signal converter to a wall mounting rail
TS35 (EN 50022). The facility can be removed and reversed to be used for wall
mounting with the help of two screws.
Signal converter
Bus driver
Power supply
LEDs