Procurement managers rarely finalize PLC-RPT-24DC-21AU without reviewing Phoenix SMPS, Phoenix 2966207 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches, ensuring that the chosen component meets budget, compliance, and delivery conditions.
Phoenix PLC-RPT- 24DC/21AU Relay Module
The Phoenix PLC-RPT- 24DC/21AU Relay Module (Part No: 2900306 ) offers a 24 V DC nominal input voltage UN, 18.5 V DC ... 33.6 V DC (20 °C) input voltage range, polarized Drive, 5 ms typical response time. Manufactured by Phoenix under the Phoenix Relay Module category, this model belongs to the Phoenix PLC Series.
| Brand | Phoenix Contact |
| Product Type | Relay Module |
| Model Number | PLC-RPT- 24DC/21AU |
Phoenix PLC-RPT- 24DC/21AU Relay Module – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Relay Module |
| Product family | PLC-INTERFACE |
| Application | Universal |
| Mechanical service life | 2x 107 cycles |
| Insulation | - |
| Overvoltage category | III |
| Pollution degree | - |
| Maximum power dissipation for nominal condition | 0.22 W |
| Test voltage (Winding/contact) | 4 kV AC (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | - |
| Rated surge voltage | - |
| Nominal input voltage UN | 24 V DC |
| Input voltage range | 18.5 V DC ... 33.6 V DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 9 mA |
| Typical response time | 5 ms |
| Typical release time | 8 ms |
| Protective circuit | Reverse polarity protection; Polarity protection diode |
| Operating voltage display | Yellow LED |
| Contact switching type | 1 changeover contact |
| Type of switch contact | Single contact |
| Contact material | AgSnO, hard gold-plated |
| Maximum switching voltage | 250 V AC/DC |
| Limiting continuous current | 6 A |
| Maximum inrush current | 50 mA |
| Min. switching current | 10 mA (at 12 V) |
| Interrupting rating (ohmic load) max. | 140 W (at 24 V DC) |
| Switching capacity | 2 A (at 24 V, DC13) |
| Connection method | Push-in connection |
| Stripping length | 10 mm |
| Conductor cross section rigid | 0.14 mm² ... 2.5 mm² |
| Conductor cross section flexible | 0.14 mm² ... 2.5 mm² |
| Conductor cross section AWG | 26 ... 14 |
| Tightening torque | - |
| Width | 6.2 mm |
| Height | 80 mm |
| depth | 94 mm |
| Color | gray (RAL 7042) |
| Flammability rating according to UL 94 | V0 (Housing) |
| 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 |
| Temperature | D |
| Humidity | A |
| Vibration | B/C |
| EMC | B |
| Enclosure | Required protection according to the Rules shall be provided upon installation on board |
| Low Voltage Directive | Conformance with Low Voltage Directive |
| Electromagnetic compatibility | Conformance with EMC directive |
| Standards/regulations | IEC 60947-5-1 |
| Mounting Type | DIN rail mounting |
| Mounting position | any |
| Contact Connection type | Signal contact |
| Output fuse | 4 A gL/gG NEOZED |
| Degree of protection (Installation location) | - |
Engineered with precision, the Phoenix Contact PLC-RPT-24DC/21AU is part of the trusted PLC-INTERFACE family, known for efficiency and long service life. It operates on a nominal input voltage of 24 V DC with an input range between 18.5 V DC and 33.6 V DC, ensuring consistent performance in diverse electrical conditions. The module consumes a typical input current of 9 mA at UN, supported by a fast response time of 5 ms and a release time of 8 ms—key parameters for precise industrial switching.
Built for durability, the mechanical service life of 2×10⁷ cycles ensures reliability over extended operation. Its push-in connection system simplifies wiring, while reverse polarity protection and polarity protection diode safeguard sensitive circuits. The relay features one changeover contact with AgSnO hard gold-plated contacts, capable of handling up to 6 A continuous current and a maximum switching voltage of 250 V AC/DC. Its slim 6.2 mm width and DIN rail mounting design make it easy to integrate into control panels while maintaining safe operation with IP20 protection at the relay base. The Phoenix Contact 2900306 adheres to IEC 60947-5-1 standards, ensuring conformance with Low Voltage and EMC directives, making it a dependable choice for control and signal switching applications.
In industrial automation, the PLC-RPT-24DC/21AU is widely used for isolating, amplifying, and switching signals between PLCs and field devices. Engineers value this Phoenix Universal Relay Module for its stability under vibration, extended operating temperature range from -40°C to 70°C, and low power dissipation of just 0.22 W. It performs reliably in control cabinets, machinery automation panels, and signal interface systems where compactness and safety are essential. The module’s monostable drive function, together with LED status indication, helps maintenance teams identify system status quickly, improving productivity in field operations.
Industrial users across manufacturing, process control, and electrical distribution applications depend on the PLC-RPT-24DC/21AU for efficient performance and long-term stability. Whether used in automated production lines or electrical safety systems, this Relay Module consistently maintains operational integrity under challenging environmental conditions, aligning with global quality standards expected from Phoenix Contact.
