Siemens UH50 Series Manual page 26

Function data
Note
Pulse inputs
Note
Tariff control
Note
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Siemens
Building Technologies
The WZU-GM is a complementary module used for wireless data transmission in
the form of SMS via a GSM network. Messages with data are sent at preconfigured
times. When no SMS are sent, the module operates in idle/Eco mode and is sepa-
rated from the GSM network. It sends 2 types of SMS – service and data messag-
es. The module is programmed via configuration SMS and can be installed either
with an internal or external antenna.
The module must be plugged into socket 1.
The module is equipped with 2 pulse meters and is galvanically isolated from the
meter (pulse inputs I1 and I2 have a common ground). It has its own lithium battery
and powers the pulse inputs, in addition to the GSM processor.
The pulse sources used for the respective inputs are either potentialfree contacts
(e.g. relay or Reed contacts) or electronic signal sources (e.g. open collector). The
pulse valency can be set from 0.01 liters/pulse to 10,000.00 liters/pulse in incre-
ments of 0.01 liters/pulse.
The display (only with firmware 5.15) is made in m3 with 7 digits, depending on
the parameter settings made (without or with 1 decimal place).
When using the open collector circuit, the polarity of the inputs must be observed.
The following options are available for tariff control.
The summation of energy and volume in the standard registers is performed
independently of the tariff situation!
Threshold value tariff (tariffs T2, 3, 4, 5, 6)
Tariff registers 1, 2 and 3 can be controlled via up to 3 threshold values.
Either energy or volume can be summated in the tariff registers.
The threshold values can be derived from the flow rate (tariff T2), the power (tariff
T3), the return temperature (tariff T4), the flow temperature (tariff T5), or the
temperature differential (tariff T6).
Supplied quantity of energy (tariff T7)
In tariff register 1, the energy calculated from the flow temperature is summated
(and not from the temperature differential).
Returned quantity of energy (tariff T8)
In tariff register 1, the energy calculated from the return temperature is summated
(and not from the temperature differential).
Heat/cooling energy meter (tariff T9)
In tariff register 1, the measured cooling energy is summated, in tariff register 2,
the measured thermal energy. In both cases, a threshold can be defined via the
flow temperature (cold threshold, heat threshold).
Ultrasonic heat and cooling energy meters UH50.. CE2N5324en
2013-01-14