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Phoenix PLC-RSC-24DC/21/EX Relay Module
The Phoenix PLC-RSC-24DC/21/EX Relay Module (Part No: 2909524 ) 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-RSC-24DC/21/EX |
Phoenix PLC-RSC-24DC/21/EX Relay Module – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Relay Module |
| Product family | PLC-INTERFACE |
| Application | Class I, Division 2 |
| Mechanical service life | 2x 107 cycles |
| Insulation | - |
| Overvoltage category | III |
| Pollution degree | 3 |
| 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 |
| 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 | 10 A (4 s) |
| Min. switching current | 10 mA (12 V) |
| Interrupting rating (ohmic load) max. | 140 W (at 24 V DC) |
| Switching capacity | 2 A (at 24 V, DC13) |
| Connection method | Screw connection |
| Stripping length | 8 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 | 0.6 Nm ... 0.8 Nm |
| 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 (UL) |
| 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 | Power contact |
| Output fuse | - |
| Degree of protection (Installation location) | - |
The Phoenix Contact PLC-RSC-24DC/21/EX (Part No: 2909524) Relay Module is engineered for precise performance and durability in industrial and hazardous area applications. Part of the PLC-INTERFACE family, it operates at a nominal input voltage of 24V DC and supports an input range from 18.5V DC to 33.6V DC. Designed for long-term reliability, it offers a mechanical service life of 2×10⁷ cycles and features a single changeover contact made of AgSnO material for superior conductivity and wear resistance. Its built-in reverse polarity protection and polarity protection diode enhance circuit safety, while the yellow LED indicator provides quick visual feedback during operation. The compact structure (6.2 mm width, 80 mm height, and 94 mm depth) allows easy DIN rail mounting within tight panels. With a 4 kV AC test voltage between winding and contact and low power dissipation of 0.22 W, this Phoenix Contact Relay Module delivers high switching accuracy and electrical endurance. Compliant with IEC 60947-5-1 and designed for operation between -40°C and 70°C, it ensures stable, long-lasting control performance even under harsh industrial conditions.
The Phoenix Contact Relay Module PLC-RSC-24DC/21/EX (2909524) is widely used in automation cabinets, PLC outputs, and control circuits where 24VDC switching precision is crucial. This phoenix contact relay 24vdc provides safe isolation for input and output signals, ideal for industrial control, power distribution, and monitoring systems. Maintenance engineers prefer the phoenix contact plc-rsc-24dc-21-ex for its compact size, fast switching response, and reliable performance. Its screw connection terminals enable quick installation and maintenance, reducing downtime in high-volume production environments. With long mechanical endurance and consistent operational stability, this phoenix contact slim relay 24vdc delivers dependable control for automation and Class I, Division 2 applications.
The Phoenix Contact PLC-RSC-24DC/21/EX (2909524) is a reliable relay module designed for precision and longevity in industrial automation systems. Built to ensure stable 24VDC switching performance, the PLC-RSC-24DC-21-EX-2909524 model combines durability, efficiency, and compact design for seamless integration into PLC and control panels. Its low power dissipation, strong electrical isolation, and wide operating temperature range make it suitable for demanding industrial environments. Engineers value this model for its high switching reliability and consistent performance across long operational cycles. The Phoenix Contact PLC-RSC-24DC/21/EX is trusted by automation professionals for dependable, energy-efficient control in modern industrial applications.
