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Phoenix Contact 2903370
Product Name
RIF-0-RPT-24DC/21 preassembled electromechanical relay module, 24 VDC coil, one changeover contact.
Product Introduction
2903370 is a RIFLINE complete relay module consisting of a push-in base with ejector and a pluggable power contact relay. It isolates, multiplies, or amplifies control signals between PLC outputs and field loads, suitable for automation panels, machine control, and auxiliary switching.
Detailed content
Technical Specifications
Order code or article reference: 2903370.
Product family: RIFLINE complete.
Coil voltage: 24 VDC nominal.
Input voltage range: 19.2 VDC to 36 VDC at 20°C.
Typical coil current: 9 mA.
Response time: 5 ms typical.
Release time: 8 ms typical.
Contact type: one changeover contact, single contact.
Contact material: AgSnO.
Maximum switching voltage: 250 VAC and 250 VDC.
Minimum switching voltage: 5 V at 100 mA.
Limiting continuous current: 6 A.
Minimum switching current: 10 mA at 12 V.
Maximum inrush current: 10 A for 4 s.
Interruption rating ohmic: 140 W at 24 VDC, 1500 VA at 250 VAC, plus additional ratings at 48/60/110/220 VDC.
Utilization categories: AC15 3 A/250 V, DC13 1.5 A/24 V and lower ratings at higher DC voltage.
Protective circuit: freewheeling diode.
Status display: yellow LED.
Connection: push-in, 0.14 mm² to 1.5 mm² rigid or flexible, AWG 24 to 16, 8 mm stripping length.
Dimensions: 6.2 mm width, 93 mm height, 78 mm depth.
Housing color: gray RAL 7042.
Flammability: UL 94 V2 housing.
Insulation: safe isolation, overvoltage category III, pollution degree 2.
Test voltage winding/contact: 4 kVrms for 1 minute.
Rated insulation voltage: 250 VAC.
Rated surge voltage: 6 kV.
Mechanical service life: approximately 20 million operations.
Base protection: IP20.
Relay sealing: RT III.
Operating temperature: -40°C to 60°C.
Storage and transport temperature: -40°C to 85°C.
Mounting: DIN rail.
Approvals: UL 508 and relevant IEC/CE compliance for the relay system.
Functional Features
Monostable polarized 24 VDC coil with diode suppression.
Single changeover contact for NO or NC field wiring.
Push-in termination for fast wiring without tools beyond strip preparation.
Ejector base for relay removal and replacement.
LED coil-status indication for troubleshooting.
Universal application as signal isolator, contact multiplier, or small-load switch.
Material Composition and Structure
Gray self-extinguishing plastic base with push-in clamping elements, silver-tin-oxide relay contacts, copper alloy conductors, plug-in electromagnetic relay, and integrated status LED. The preassembled set includes base and power relay as one DIN-rail module.
Working Principle
A 24 VDC control signal energizes the coil through the freewheeling-diode protected input. The electromagnetic armature moves the AgSnO changeover contact, opening or closing the output circuit according to wiring. The yellow LED indicates coil energization, and the base ejector allows relay exchange without rewiring the fixed push-in terminals.
Installation Requirements
Mount on a standard DIN rail in the control cabinet. Strip 8 mm of conductor, insert solid or ferruled flexible wire into the push-in terminals, and tighten according to 0.14–1.5 mm² rating. Connect coil side to 24 VDC with correct polarity; connect load side to the changeover contacts. Leave clearance for heat dissipation and label coil versus contact terminals.
Usage Notes
Do not exceed 6 A continuous, 250 V switching, or the stated VA/W ratings for the load type. Use appropriate contact protection for inductive DC loads. Replace the plug-in relay if switching reliability degrades after prolonged high-cycle operation. Keep the base terminals clean and confirm IP20 enclosure conditions inside the cabinet.
