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Siemens
Ultrasonic heat and cooling energy meters UH50..
CE2N5324en
Building Technologies
2013-01-14
Multipolar connection terminals are used to connect external cables to the
modules.
Choice of connections:
- Solid or stranded wire
0.2…2.5 mm²
- Stranded wire with ferrule
0.25…1.5 mm²
- Cable sizes
26 - 14 AWG
Multiline connection (2 lines of same cross-sectional area)
- Solid or stranded wire
0.2…0.75 mm²
- Stranded wire with ferrule without plastic sleeve
0.25…0.34 mm²
- Stranded wire with TWIN ferrule and plastic sleeve 0.5…0.75 mm²
Recommended screwdriver
0.6 x 3.5 mm
Tightening torque
0.4 Nm
The outer diameter of the cable must be between 4 mm and 6 mm. All cables must
enter trough the meters’ bushings. It may be convenient to connect the cables be-
fore the meter in a single multi-conductor cable on a split box.
If a shielded cable is used, the shield must not be connected to the side of the me-
ter (connect to one end only).
The pulse modules (WZU-P2 and WZU-P2L) enable the meter to communicate
with a pulse collector to transmit measured values. It permits the output of pulses
that can be derived from the quantity of heat, volume, tariff register 1 or tariff
register 2. Two channels are available whose functions can be parameterized with
the service software.
The outputs are in the form of standard pulses or "fast pulses". The pulse duration
is identical for channel 1 and channel 2.
The modules can be plugged into both sockets, but fast pulses can only be output
via socket 2.
The pulse modules are available in 2 different versions:
WZU-P2
Pulse module
with 2 channels to output standard or "definable"
pulses
WZU-P2L
Pulse module with opto MOS output,
low voltage drop and
reversed polarity protection
Standard pulse valencies
*) depending on the unit for heat display
Pulse modules
WZU-P2/WZU-P2L
Function data
Note
Standard pulses