13
The pulse inputs can be used for connection of electricity and water meters.
Please pay attention to maximum pulse frequency as well as correct pulse coding
(l/imp. and Wh/imp.), which is selected by means of the FF and GG configuration.
65 - 66
Input A
67 - 68
Input B
9.1.2 M-Bus, type 67-00-20/27/28/29
M-Bus can be mounted in star, ring or 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 comes with pulse inputs.
9.1.3 Radio + pulse inputs, 67-00-21/25/26
The radio module is used for wireless communication
via licence-free radio frequency and can be supplied with
internal antenna or with connection for external antenna.
For further information on radio we refer to
Technical description for radio (5512-012).
The pulse inputs of this module are identical with the
previously described pulse inputs.
note!
Type 67-00-21 includes radio and router functions.
The RadioRouter module (67-00-21) must be used
with mains supply.