User Manual

CE1N5366E / 06.11.1998 Siemens Building Technologies
2/4 Landis & Staefa Division
On the M-bus repeater, the direction and type of the current data flow are indicated by
LEDs:
LED Designation Status Data flow
LED 1 (green) «ON» On Bus voltage present, master in idle
state
Flashing Bus voltage present, master sending
LED 2 (yellow) «SLAVE» On Slave sending
aus Slave in idle state
LED 3 (yellow) «MAX» On Normal bus current exceeded
LED 4 (red) «SHORT» On SDA bus Sync (U
Bus
= 0 V at input
TSS)
Flashing at 2 Hz Overcurrent
According to standards, the maximum current drawn by an M-bus user is 1.5 mA,
representing one “M-bus load”.
The M-bus output is protected against short-circuits.
Power is delivered by a power pack (DC 42 V).
The M-bus repeater consists of casing and detachable mounting base. The casing is
designed for wall mounting.
When closed, no indication or setting elements are visible. When opening the bottom
section of the casing, the connection terminals and LEDs can be accessed.
The terminal blocks carry two rows of contacts. The top row is used for the positive
potentials while the bottom row is used for the negative potentials.
The local regulations on electrical installations must be complied with.
For the design of M-bus systems, please refer to the Planning Handbook, J5361.
Connect the DC 42 V power pack to the terminals 42 V + and - and to the earth terminal
E.
It must be made absolutely certain that the polarity of the power pack will be
correct!
Before making the connections, it is recommended to check the polarity with a
multimeter.
conformance to
EMC directive 89/336/EEC
Low voltage directive 73/23/EEC
Operating voltage
(safety extra low voltage to EN 60730) DC 42 V
Power consumption 25 VA
Degree of protection (when cover is closed) IP40 to EN 60529
Safety class I to EN 60730
Perm. ambient temperatures
Transport and storage - 25...+ 65 °C
Operation 0...55 °C
Weight 1.1 kg
Mechanical design
Engineering notes
Fitting notes
Technical data