Yokogawa|ALR121-S53|Loop-Powered Alarm Relay Module
Description
The YOKOGAWA ALR121-S53 is a loop-powered alarm relay module designed for process monitoring and safety applications.
Features
-
Loop-powered operation (4–20 mA).
-
Dual alarm setpoints with relay outputs.
-
Compact and easy-to-install design.
-
LED indicators for status monitoring.
Technical Specifications
-
Input Signal: 4–20 mA DC (loop-powered).
-
Alarm Setpoints: 2 independently configurable setpoints.
-
Relay Outputs: 2 SPDT relays (1 per alarm).
-
Relay Contact Rating: 250 V AC, 3 A (resistive load).
-
Accuracy: ±0.5% of span.
-
Response Time: ≤ 1 sec.
-
Operating Temperature: -20 to +60 °C.
-
Storage Temperature: -40 to +85 °C.
-
Humidity Range: 10 to 90% RH (non-condensing).
-
Power Consumption: Max 1.5 W.
-
Isolation Voltage: 1500 V AC (input to output).
-
Dimensions: 22.5 mm × 99 mm × 115 mm (W × H × D).
-
Weight: Approx. 200 g.
Yokogawa|ALR121-S53|Loop-Powered Alarm Relay Module



Yokogawa|ALR121-S53|Loop-Powered Alarm Relay Module
Description
The YOKOGAWA ALR121-S53 is a loop-powered alarm relay module designed for process monitoring and safety applications.
Features
-
Loop-powered operation (4–20 mA).
-
Dual alarm setpoints with relay outputs.
-
Compact and easy-to-install design.
-
LED indicators for status monitoring.
Technical Specifications
-
Input Signal: 4–20 mA DC (loop-powered).
-
Alarm Setpoints: 2 independently configurable setpoints.
-
Relay Outputs: 2 SPDT relays (1 per alarm).
-
Relay Contact Rating: 250 V AC, 3 A (resistive load).
-
Accuracy: ±0.5% of span.
-
Response Time: ≤ 1 sec.
-
Operating Temperature: -20 to +60 °C.
-
Storage Temperature: -40 to +85 °C.
-
Humidity Range: 10 to 90% RH (non-condensing).
-
Power Consumption: Max 1.5 W.
-
Isolation Voltage: 1500 V AC (input to output).
-
Dimensions: 22.5 mm × 99 mm × 115 mm (W × H × D).
-
Weight: Approx. 200 g.