72.42.0.230.0000 Finder Priority change relay 2p 12A DC 110/240V

Why Choose the Finder 72.42.0.230.0000 Priority Change Relay

The Finder 72.42.0.230.0000 is a compact, DIN rail mounted priority change relay designed to alternate the duty of two loads so that wear is distributed evenly. Supplied from 110 to 240 V AC or DC, it provides two independent normally open outputs rated 12 A at 250 V AC, with selectable functions to suit alternating duty or single channel service modes. Typical uses include duty share of twin pumps, compressors, refrigeration units and HVAC fans where reliable, simple sequencing is required.

With clearly labelled terminals, status LEDs per channel and a built in start interval to avoid simultaneous starts, panel builders can implement tidy, robust control for alternating loads with minimal wiring.

Key Features

• Two independent NO outputs, 12 A at 250 V AC, DPST NO configuration.
• Wide supply range 110 to 240 V AC or DC for flexible installation.
• Four selectable functions: MI, ME, M1, M2 for alternating and single output modes.
• Built in start interval T to prevent simultaneous motor starting.
• Status indication with separate LEDs for each output.
• 35 mm DIN rail mounting, 35 mm wide housing with IP20 terminations.

Technical Specifications

• Manufacturer: Finder
• Series: 72 Series Monitoring Relays
• Model: 72.42.0.230.0000
• Function set: MI alternating on successive supply applications, ME alternating on control signal, M1 output 1 only, M2 output 2 only
• Supply voltage: 110 to 240 V AC or DC
• Outputs: 2 x NO contacts, terminals 11-14 and 21-24
• Contact rating: 12 A at 250 V AC (AC1), max switching voltage 400 V AC typical
• Control inputs: S1 and S2, independent control signals insulated from supply
• Indication: LED 1 for output 1, LED 2 for output 2
• Start interval: Adjustable or preset delay T to stagger starts between outputs
• Mounting: 35 mm DIN rail, EN 60715
• Housing width: 35 mm
• Protection: IP20 terminals
• Terminals: A1, A2 supply. S1, S2 control. 11-14 and 21-24 outputs.
• Operating temperature: Refer to Finder datasheet for full range and derating guidance
• Accessories: Marker tags 060.48, identification tag 019.01, panel adaptors 011.01 and 020.01
• Notes: For motor loads use appropriate contactor where required. Observe inrush and AC3 duties per application.

Certifications

CE and UKCA compliant. Conforms to relevant low voltage and EMC requirements. Refer to Finder documentation for full declarations and environmental statements.

Comparison and Selection Notes

Choose 72.42.0.230.0000 for applications requiring alternating duty from a universal 110 to 240 V AC or DC supply. Where the control source is 24 V, select 72.42.0.024.0000. For single level control or window functions on conductive liquids, use related 72.01, 72.11 or 72.51 relays alongside the 72.42 for pump sequencing.

Frequently Asked Questions

• What does a priority change relay do
• How do MI and ME functions differ
• Can both outputs run at the same time
• What are the contact ratings
• What are typical applications

Applications

• Duty share of twin pumps in water and wastewater systems.
• Alternating compressors in refrigeration and compressed air systems.
• HVAC fan sets and condensate pumps.
• General alternating duty where even wear and redundancy are required.

Trusted By Customers Worldwide

"Simple to wire and dependable in service. Alternates our twin pump sets cleanly without nuisance starts." - Martin K, Maintenance Supervisor

Customer Reviews

Overall rating: 5 Star Product

"Clear LEDs and sensible terminal layout. Does exactly what is needed for pump alternation." - Amira L, Panel Builder, 5 Star Product