6
4. Testing the function
Carry out a function control when the meter has been fully mounted. Activate the
pushbutton on MULTICAL
®
61 and check that the displayed values for water flow
etc. are credible values.
5. Plug-in modules
A number of extra functions can be added to MULTICAL
®
61 by means of plug-in
modules. The individual modules are briefly described below.
5.1 BASE MODULES
5.1.1 Data + pulse input, type 67-00-10
The data terminals are used for connection of e.g. a PC.
The signal is passive and galvanically separated by means
of optocouplers. Conversion into RS232 level requires
connection of data cable 66-99-106 (D-Sub 9F) or
66-99-098 (USB) with the following connections:
62
Brown
(DAT)
63
White
(REQ)
64
Green
(GND)
The pulse inputs can be used for connection of electricity and water meters.
Please note the maximum pulse frequency as well as correct pulse coding (l/imp.
and Wh/imp.), which are selected by means of the FF and GG configurations.
65 - 66
Input A
67 - 68
Input B
5.1.2 M-Bus, type 67-00-20
M-Bus can be mounted in star, ring and bus topology. Up to 250 meters can be
connected depending on the M-Bus Master’s power supply and the total cable
resistance.
Cable resistance
<
29 ohm
Cable capacity
<
180 nF
The M-Bus network is connected on terminals 24 and 25.
The polarity is unimportant.
M-Bus is supplied with pulse inputs.
