Alarm block

Description: An alarm unit providing audio and visual warnings in case of:
- Loss of voltage on the monitored line;
- Receipt of a dry contact emergency signal.
The device features four operating modes and can monitor:
- 24 VDC voltage;
- 230 VAC voltage;
- Dry contact (NO/NC) alarm input status.

Operating mode: In alarm mode, the unit emits short audible beeps and flashes the LED built into the acknowledgment button.
The operating mode is selected via the switches under the unit’s cover:
1. 24V DC power monitoring mode – Alarm triggered when 24V DC is lost at input X2.
2. 230V AC power monitoring mode – Alarm triggered when 230V AC is lost at input X2.
3. Normally Open (NO) dry contact input mode – Alarm triggered when a short circuit occurs between the "+" and "-" terminals at input X2.
4. Normally Closed (NC) dry contact input mode – Alarm triggered when an open circuit occurs between the "+" and "-" terminals at input X2.

TECHNICAL SPECIFICATIONS

Power supply voltage	9-36 VDC
Power consumption	≤ 2 W
Galvanic isolation from power supply	Yes
Reverse polarity protection	Yes
Number of input ports	1
Input signal types	24VDC, 230VAC, Dry contact (NO/NC)
Galvanic isolation of inputs	Yes
Storage temperature	-55°C to +75°C
Operating temperature	-30°C to +55°C
Protection class	IP 22
Dimensions (W×H×D)	115x116x55 mm
Weight	0.53 kg