Phoenix PLC-RSC-24UC/21-21 2 Changeover Relay
Phoenix PLC-RSC-24UC/21-21 is a relay module with 24 V AC/DC nominal input and 2 changeover contacts for control circuits. This Phoenix Phoenix 2 Changeover Relay 2967073 belongs to the PLC Series and features 4 kV AC test voltage, 6 kV rated surge voltage, safe isolation between control and contact sides, monostable polarized drive, bridge rectifier protective circuit, yellow LED operating display, AgNi contact material, screw connection, 8 ms response time, 10 ms release time, and 0.42 W maximum power dissipation.
| Brand | Phoenix Contact |
| Product Type | Relay Module |
| Model Number | PLC-RSC- 24UC/21-21 |
Phoenix PLC-RSC-24UC/21-21 2 Changeover Relay - Technical Specifications
| Specification | Value |
|---|---|
| Product type | Relay Module |
| Product family | PLC-INTERFACE |
| Application | Universal |
| Mechanical service life | 3x 107 cycles |
| Insulation | Safe isolation: Control side / contact side |
| Overvoltage category | III |
| Pollution degree | 3 |
| Maximum power dissipation for nominal condition | 0.42 W |
| Test voltage (Winding/contact) | 4 kV AC (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | 2.5 kV AC (50 Hz, 1 min., changeover contact/changeover contact) |
| Rated surge voltage | 6 kV |
| Nominal input voltage UN | 24 V AC/DC |
| Input voltage range | 20.6 V AC/DC ... 33.6 V AC/DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 17.5 mA (at UN = 24 V AC) |
| Typical response time | 8 ms |
| Typical release time | 10 ms |
| Protective circuit | Bridge rectifier; Bridge rectifier |
| 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 | 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 | 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 PLC-RSC-24UC/21-21 Phoenix 2 Changeover Relay 2967073 is designed for universal switching tasks in industrial automation panels. It operates at 24 V AC/DC with 2 changeover contacts and supports 4 kV AC insulation with a 6 kV surge voltage rating. With safe isolation and polarized monostable drive, it ensures controlled switching performance. As part of the PLC Series, this Phoenix relay module is used in industrial automation systems across India.
In conveyors, packaging machines, assembly stations, and distributed control cabinets, the PLC-RSC-24UC/21-21 enables stable signal and load switching between PLC outputs and field devices. The screw connection method ensures secure panel wiring, while the bridge rectifier protective circuit supports reliable AC/DC input handling. Its 8 ms response time and 3x 10⁷ mechanical service life provide consistent operation in repetitive industrial processes.
The PLC-RSC-24UC/21-21 Phoenix 2 Changeover Relay 2967073 combines electrical insulation, defined switching, and compact integration for control panels. With 24 V AC/DC input, two changeover contacts, 4 kV AC test voltage, and 0.42 W power dissipation, it meets structured automation requirements. Manufactured by Phoenix under the PLC Series, this relay module supports dependable performance in industrial automation environments.
