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6. Communication interfaces
6.1 Pin assignments
(See Fig. 3, page 8)
M-bus or pulse variants
A connecting cable with plug is supplied for the meter variants; 3-pole, cable length 3 m.
1. Remove the locking segment.
2. Insert the plug so that the green cable is always on the left.
3. Plug in the locking segment again.
6.2 M-Bus
• Polarity reversal protection
• Ground (brown) is not required
• The meter is supplied with power from the M-bus
The cabling for an M-Bus-system requires no specified cable routing or network (e.g. star, series, etc.).
The preferred read interval should be at least 10 seconds. When communicating via the M-Bus, the but-
ton and the optical interface cannot be used simultaneously.
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