Signal relay unit (RU) is designed to receive notifications from Control Panel (CP) via the RS-485 wired interface and to issue notifications to the relay outputs.
It is possible to connect the relay unit to the RS-485 ring interface of the Control Panel using isolators Astra-A ILS compatible with control panel and Relay unit
of 5.5 versions.
The relay unit is controlled with Control Panels Astra-812 Pro and Astra-8945 Pro, radio extender Astra-WE 433 (WE-433). Sources of notifications for the relay unit are partitions of the Control Panel or detectors registered in the WE-433.
The RU has two independent power supply inputs: U1 and U2, and a Zone input for monitoring the serviceability of power supplies.
- 8 alarm relays;
- outputs are controlled according to the tactics of typical modes selected when setting up the control panel;
- two LED indicators:
- the state of the main and backup power,
- the state of communication with the control panel.
|from 10 to 27 V DC
|RS-485 interface line length
|Max. amperage switched by relay
|Max. switched voltage relay
|100 V DC
|Input zone resistance:
|3 to 5 kOhm
|0 to 3 or more than 5 kOhm
|from -30 to +55 °С
|Relative air humidity
|up to 93% at +40°С (without moisture condensation)