The network node consists of two major housing components: The upper section with cover for wall mounting and the removable lower section.
| (1) Upper section for wall mounting |
(2) Cover | |
(3) Lower section |
The upper section (1) only accommodates the main battery.
The lower section (3) contains the operating elements for the network.
Lower section
1. | Socket for M-bus service connection | 7. | Reset button (recessed) |
8. | Display | ||
2. | Socket for extension module | 9. | Serial number |
3. | Socket for power supply DC 3.6 V | 10. | Mode button (MODE, red) |
4. | LED for mains power on third-party power supplies | 11 | Display button (DISPLAY, blue) |
5. | Socket for backup battery DC 3.6 V | 12 | IrDA interface (optical) / LED on front |
6. | Socket |
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Backup battery
The backup battery ensures uninterrupted operation of the network node in the event of a temporary power failure (e.g. mains failure or when the main battery is replaced).
The main battery is not installed at the factory on the network node. The backup battery provides power during this period.
M-bus interface
Using socket (1), the M-bus can be permanently connected (fixed) to the network node. The plug is included in the delivery. An additional socket (2) is available for temporary connections (e.g. for service purposes).
8-pin interface
The USB programming adapter RNNPH0010020 can be connected to the 9-pin socket for servicing.
Display
The WTT662 network node features a LCD to display various parameters and error codes.
