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By Phoenix Contact


PLC-RPT- 24DC/21 - Relay Module

PLC-INTERFACE, consisting of PLC-BPT.../21 basic terminal block with Push-in connection and plug-in miniature relay with power contact, for mounting on NS 35/7,5 DIN rail, 1 changeover contact, input voltage 24 V DC

  • Slim design
  • Efficient connection to system cabling using V8 adapter
  • RT III sealed relay
  • Safe isolation between coil and contact side
  • Functional plug-in bridges
  • Integrated input circuit and interference suppression circuit
Technical Specifications


Notes on operationSeparating plate PLC-ATP must be installed for voltages larger than 250 V (L1, L2, L3) between identical terminal blocks in adjacent modules. Potential bridging is then carried out with FBST 8-PLC... or FBST 500....

Product properties

Product familyPLC-INTERFACE
Operating mode100% operating factor
Mechanical service life2x 107 cycles

Electrical properties

Maximum power dissipation for nominal condition0.22 W
Test voltage (Winding/contact)4 kV AC (50 Hz, 1 min., winding/contact)

Insulation characteristics: Coil/contact

Rated Insulation Voltage250 V
Rated impulse withstand voltage6 kV
Overvoltage categoryIII
Degree of pollution3

Coil side

Nominal input voltage UN24 V DC
Input voltage range18.5 V DC ... 33.6 V DC (20 °C)
Drive and functionmonostable
Drive (polarity)polarized
Typical input current at UN9 mA
Typical response time5 ms
Typical release time8 ms
Protective circuitReverse polarity protection; Polarity protection diode
Protective circuitSurge protection; Freewheeling diode
Operating voltage displayYellow LED


Contact switching type1 changeover contact
Type of switch contactSingle contact
Contact connection typePower contact
Contact MaterialAgSnO
Maximum Switching Voltage250 V AC/DC (The separating plate PLC-ATP should be installed for voltages larger than 250 V (L1, L2, L3) between identical terminal blocks in adjacent modules. Potential bridging is then carried out with FBST 8-PLC... or ...FBST 500...)
Minimum Switching Voltage5 V (100 mA)
Limiting Continuous Current6 A
Maximum Inrush Current10 A (4 s)
Min. switching current10 mA (12 V)
Short-circuit current200 A (conditional short-circuit current)
Interrupting rating (ohmic load) max.140 W (at 24 V DC)
Interrupting rating (ohmic load) max.20 W (at 48 V DC)
Interrupting rating (ohmic load) max.18 W (at 60 V DC)
Interrupting rating (ohmic load) max.23 W (at 110 V DC)
Interrupting rating (ohmic load) max.40 W (at 220 V DC)
Interrupting rating (ohmic load) max.1500 VA (for 250 V AC)
Output fuse4 A gL/gG NEOZED
Switching capacity2 A (at 24 V, DC13)
Switching capacity0.2 A (at 110 V, DC13)
Switching capacity0.1 A (at 220 V, DC13)
Switching capacity3 A (at 24 V, AC15)
Switching capacity3 A (at 120 V, AC15)
Switching capacity3 A (at 230 V, AC15)

Connection data

Connection MethodPush-in connection
Stripping length10 mm
Conductor cross section rigid0.14 mm² ... 2.5 mm²
Conductor cross section flexible0.14 mm² ... 2.5 mm²
Conductor cross section flexible0.2 mm² ... 2.5 mm² (Single ferrule)
Conductor cross section flexible2x 0.5 mm² ... 1 mm² (TWIN ferrule)
Conductor cross section AWG26 ... 14


Width6.2 mm
Height80 mm
Depth94 mm

Material specifications

Colorgray (RAL 7042)
Flammability rating according to UL 94V0 (Housing)

Ambient conditions

Degree of protection (Relay)RT III (Relay)
Degree of protection (Relay base)IP20 (Relay base)
Ambient Temperature (Operation)-40 °C ... 70 °C (see to derating)
Ambient temperature (storage/transport)-40 °C ... 85 °C





Shipbuilding approval


Corrosive gas test

IdentificationISA-S71.04. G3 Harsh Group
IdentificationEN 60068-2-60

DNV GL data

EnclosureRequired protection according to the Rules shall be provided upon installation on board

EMC data

Low Voltage DirectiveConformance with Low Voltage Directive
Electromagnetic compatibilityConformance with EMC directive

Standards and Regulations

Standards/regulationsIEC 60947-5-1


Mounting TypeDIN rail mounting
Assembly instructionsin rows with zero spacing
Mounting Positionany

Why Proax for Phoenix Contact PLC-RPT- 24DC/21?

Proax is an authorized distributor of Phoenix Contact PLC-RPT- 24DC/21 and one of Phoenix Contact's largest distributors in North America. Our highly skilled in-house technical team is ready to assist with any technical needs.

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Additional Information

Alternate NamesPLCRPT24DC21
Pack Size1

Available for order