During technical comparisons, PLC-RPT-24DC-21-21 appears alongside SMPS Phoenix, Phoenix 2966207 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Phoenix PLC-RPT- 24DC/21-21 Relay Module
The Phoenix PLC-RPT- 24DC/21-21 Relay Module (Part No: 2900330 ) offers a 24 V DC nominal input voltage UN, 20.2 V DC ... 33.6 V DC (20 °C) input voltage range, polarized Drive, 8 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/21-21 |
Phoenix PLC-RPT- 24DC/21-21 Relay Module – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Relay Module |
| Product family | PLC-INTERFACE |
| Application | Universal |
| Mechanical service life | 3x 107 cycles |
| Insulation | Safe isolation of input/output |
| Overvoltage category | III |
| Pollution degree | 3 |
| Maximum power dissipation for nominal condition | 0.43 W |
| Test voltage (Winding/contact) | - |
| Test voltage (Changeover contact/changeover contact) | - |
| Rated surge voltage | 6 kV |
| Nominal input voltage UN | 24 V DC |
| Input voltage range | 20.2 V DC ... 33.6 V DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 18 mA |
| Typical response time | 8 ms |
| Typical release time | 10 ms |
| Protective circuit | Reverse polarity protection; Polarity protection diode |
| Operating voltage display | Yellow LED |
| Contact switching type | 2 changeover contacts |
| Type of switch contact | Single contact |
| Contact material | AgNi |
| Maximum switching voltage | 250 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...) |
| Limiting continuous current | 6 A |
| Maximum inrush current | 15 A (300 ms) |
| Min. switching current | 10 mA (5 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 | 14 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 ... 60 °C |
| 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 | - |
| Output fuse | - |
| Degree of protection (Installation location) | - |
The Phoenix Contact PLC-RPT-24DC/21-21 (Part No: 2900330) Relay Module belongs to the trusted PLC-INTERFACE product family, providing dependable performance in universal automation systems. This Phoenix Input Voltage 24 V DC Relay is engineered for durability with a mechanical service life of 3×10⁷ cycles. It operates at a nominal input voltage of 24 V DC and supports a wide input range of 20.2 V DC to 33.6 V DC, making it ideal for voltage-sensitive applications. The relay features two changeover contacts with AgNi contact material, ensuring high conductivity and low contact wear. Equipped with reverse polarity protection and a polarity protection diode, it safeguards electrical components from voltage spikes. With a typical input current of 18 mA, response time of 8 ms, and release time of 10 ms, this relay ensures precise and reliable operation. Its push-in connection simplifies wiring, while DIN rail mounting enhances installation flexibility for industrial panels.
The Phoenix Contact Relay Module PLC-RPT-24DC/21-21 (2900330) is used extensively in machine control, power distribution, and automation systems requiring stable 24 V DC relay operations. Maintenance engineers rely on it for smooth switching of electrical signals, safety interlocks, and process control circuits. Its compact 14 mm width allows for high-density installation within PLC cabinets, and the yellow LED indicator provides instant visual feedback of operational status. This Phoenix Input Voltage 24 V DC Relay performs efficiently across temperatures ranging from -40°C to 60°C, making it suitable for diverse industrial environments. Designed for long service life and high reliability, it delivers consistent performance in both automation and process control setups.
The Phoenix Contact PLC-RPT-24DC/21-21 (2900330) is engineered to ensure superior electrical reliability, quick response, and enhanced durability in industrial operations. The PLC-RPT-24DC/21-21 model supports efficient 24 V DC control, making it ideal for automation panels and PLC relay interfaces. With proven performance, compact design, and robust build, the phoenix contact 2900330 relay module stands as a trusted choice among automation engineers. Industrial professionals consistently prefer the Phoenix Contact PLC-RPT-24DC/21-21 for its stability, long operational life, and energy-efficient switching across critical control systems.
