Tsuruga Electric t-531 Detect Relay 2421d-1-29-h0-t0-a

Description:

The Tsuruga Electric T-531 2421D-1-29-H0-T0-A Detect Relay is used in industrial monitoring and alarm control systems for detecting abnormal process conditions. Commonly installed in automation panels, control systems, and electrical monitoring equipment requiring high/low limit detection from analog signals. Maintenance teams and system integrators use this relay for repair, replacement, retrofit, and maintaining reliable alarm and protection functions.

Applications:

The Tsuruga Electric 2421D-1-29-H0-T0-A detect relay monitors a 4–20 mA DC input signal and provides relay outputs when preset high or low limits are reached. It is commonly used in industrial process control, instrumentation, motor protection, and automation systems where operators need alarm detection from analog transmitters and sensors. The 2421 series supports two alarm settings with relay contact outputs for monitoring applications.

Technical Specifications:

• Manufacturer: Tsuruga Electric Corporation
• Manufacturer Part Number (MPN): 2421D-1-29-H0-T0-A
• Model Series: T-531 / 2400 Series Detect Relay
• Product Type: Analog detect relay / alarm relay
• Input Signal: DC 4–20 mA
• Output Type: Relay contact output
• Alarm Configuration: High (H) and Low (L) limit detection
• Setting Method: Digital switch setting
• Hysteresis: H0 standard, less than 0.5%
• Action Delay: T0, no delay
• Power Supply: AC 85–264V, 50/60Hz
• Contact Rating: 250 VAC 0.5A / 30 VDC 2A (resistive load)
• Mounting Type: Panel mount with socket base
• Dimensions: Approx. 28.5 × 72 × 115 mm
• Function: Analog signal monitoring and alarm switching
• Application: Industrial automation, process control, instrumentation, and electrical monitoring systems
• Use: Replacement detect relay for existing Tsuruga control installations

Common Replacements:

• Tsuruga 2421D-1-29-H0-T0-A Detect Relay
• Tsuruga 2421 Series 4–20 mA Alarm Relay
• Tsuruga T-531 Analog Detection Relay