Communication
28/49
Terminals
2-pole or 4-pole terminals are used for connection of the external cables to the
modules.
Outer diameter of the cable 4
… 6 mm
Connection capacity
rigid or flexible 0.2
… 2.5 mm²
flexible with wire end ferrule 0.25
… 1.5 mm²
conductor sizes 26
… 14 AWG
Multiple conductor connector (2 conductors with the same cross-section)
rigid or flexible, 0.2
… 0.75 mm²
flexible with wire end ferrule without plastic sleeve, 0.25
… 0.34 mm²
flexible with TWIN wire end ferrule with plastic sleeve, 0.5
… 0.75 mm²
Strip-back length 5 mm
Recommended screwdriver:
0.6 × 3.5 mm
Tightening torque: 0.4 Nm
9.1
Pulse module
The pulse module permits the output of pulses that can be derived from the
quantity of heat, the volume, tariff register 1, tariff register 2 or the mistake sta-
tus. Two channels are available whose functions can be parameterized with
the service software.
Output takes the form of standard pulses or “fast pulses”. The pulse duration
is identical for channel 1 and channel 2.
Labeling
pulse module
Display in LCD
CE
,
C2
,
CV
,
CT
or
RI
Type
open collector
Voltage
max. 30 V
Current
max. 30 mA
Dielectric strength
500 V
eff
against ground
Classification
OB (per EN 1434-2)
Voltage drop
approx. 1.3 V at 20 mA
Classification
OC (per EN 1434-2)
Voltage drop
approx. 0.3 V at 0.1 mA
Output connection (WZU-P2):
A special version WZU-P2L of the pulse module is available with an Opto-Mos
output.
Advantages
low voltage drop and reverse polarity
protected (bipolar)
Connection
