ZENNER zelsius C5 CMF - Manual (Page 4)

4
Technical data calculator
Temperature range °C 0…105
Temperature difference range K 3…80
Display LCD 8-digit + additional character
Ambient temperature °C 5...55
Minimum temperature diffence K 3 ( cooling or change-over: 2)
Resolution temperature °C 0,01
Measurement frequency s adjustable ex works, beginning with 2s, standard 30s
Unit to read the heat consumption Standard MWh; optionally kWh, GJ
Data storage 1 x daily
Due date values Storage of all monthly values during the entire operating time
Maximum value storage extensive storage of flow rate, performance and other parameters
Interface Standard optical interface (ZVEI, IrDA)
optional M-Bus, wM-Bus, RS485, radio
Supply 3,6 V lithium battery (different capacities)
Battery lifetime Years > 6, opt. > 11 (changeable during the operation time)
Protection class IP54
EMC C
Ambient conditions /
climatic influencing
(valid for complete
compact meter)
- climatic
Highest permissible ambient temperature 55°C
Lowest permissible ambient temperature 5°C
Humidity class IP54
- mechanical
class
M1
- electro-magnetic
class
E1
colour connection signification
white I/O 1 In-/Output 1
yellow I/O 2 In-/Output 2
green I/O 3 In-/Output 3
brown GND
common ground for
I/O 1-3
Technical data M-Bus
Cable length 1,5 m
Cable D=3.8 mm, 2-core
A firmly attached cable is included: external
wiring must be done by oneself.
Technical data I/O
Load max. max. 30V DC/20 mA
I/O 1, 2, 3 Open Drain, n-channel FET
Cable D = 3.8 mm, 4-core
Pulse-duty factor 1:1 (out); 1:5 (in)
Cable length 1,5 m
Input frequency max. 1 Hz