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Astra-824

Signaling relay unit

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.

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.

Features

  • 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.
Name Description
Supply voltage from 10 to 27 V DC
RS-485 interface line length 1000 m
Relay quantity 8
Max. amperage switched by relay 0.1 A
Max. switched voltage relay 100 V DC
Input zone resistance:  
- Norm 3 to 5 kOhm
- Alarm 0 to 3 or more than 5 kOhm
Overall dimensions 121x80x31 mm
Operating conditions  
Temperature from -30 to +55 °С
Relative air humidity up to 93% at +40°С (without moisture condensation)