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.

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)

Manuals

824А-v1_4_instr _en.pdf