Base B8
Product description 
The B8 base is intended for use as a final base in four-wire SCs together with B2 or B4 bases (with NC contacts). The B8 base generates an output signal using the contacts of the main relay, controls the operation of the remote indicator and additionally monitors the performance of the four-wire AL. In such a system, the lack of supply voltage due to a break or removal from the base of any electronic unit leads to the formation of a “Fault” notification from this AL on the FACP.
Implementation of various functions using databases:
| Base | Number of contacts | Presence of ZPOS | The presence of a relay | Relay contacts | Connection |
| B01 | 4 | - | - | - | 2-wire |
| B1 | 6 | + | - | - | 2-wire |
| B2 | 7 | - | 1 | NO | 4-wire |
| B3 | 7 | - | 1 | NO | 4-wire |
| B4 | 8 | + | 1 | NO | 4-wire |
| B5 | 8 | + | 1 | NO | 4-wire |
| B6* | 8 | - | 2 | NC,NO | 4-wire |
| B7* | 8 | - | 2 | NC,NO | 4-wire |
| B8* | 9 | + | 2 | NC,NO | 4-wire |
| B9* | 9 | + | 2 | NC,NO | 4-wire |
Specifications
Characteristic
Value
The method of connecting to the FACP:
four-wire AL
Resistance between contacts "1" and "2" when the electronic unit is removed:
no more than 200 kΩ
Resistance between contacts "1" and "2" with installed electronic unit:
no more than 2 ohms
The method of forming the output signal:
by closing and opening relay contacts
Useful materials
| Name | Country | Comment | Open | Download |
|---|---|---|---|---|
| Manual | Ukrainian | |||
| Presentaion | ppt presentation file |
Devices with which it is used
