Phoenix PLC-RSC- 12DC/21-21 Relay Module
The Phoenix PLC-RSC- 12DC/21-21 Relay Module (Part No: 2967235 ) offers a 12 V DC nominal input voltage UN, 10.3 V DC ... 16.8 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-RSC- 12DC/21-21 |
Phoenix PLC-RSC- 12DC/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: Control side / contact side |
| Overvoltage category | III |
| Pollution degree | 3 |
| Maximum power dissipation for nominal condition | 0.4 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 | 12 V DC |
| Input voltage range | 10.3 V DC ... 16.8 V DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 33 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 | 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 | - |
| 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-RSC-12DC/21-21 (Part No: 2967235) Relay Module delivers exceptional control accuracy, long operational life, and reliable switching performance in demanding industrial automation environments. Operating at a nominal input voltage of 12V DC and within a range of 10.3V DC to 16.8V DC, this model features two changeover contacts made of high-quality AgNi material, providing superior conductivity and mechanical strength. With a mechanical service life of 3×10⁷ cycles and a low power dissipation of 0.4 W, it ensures energy-efficient operation and minimal wear during continuous switching. Built with reverse polarity protection, safe isolation between control and contact sides, and a yellow LED indicator for real-time monitoring, it provides superior electrical protection and ease of diagnostics. Measuring 14 mm wide, 80 mm high, and 94 mm deep, this Relay Module is designed for compact DIN rail mounting with secure screw connection terminals. Its 4 kV AC test voltage and compliance with IEC 60947-5-1 standards make it suitable for universal industrial and automation applications where durability, safety, and precision are essential.
The Phoenix Contact Relay Module PLC-RSC-12DC/21-21 (2967235) is widely used in PLC systems, industrial control cabinets, and automation lines where 12V DC switching accuracy and electrical isolation are critical. This Phoenix Contact 12V Relay Module provides dependable performance in power control, process management, and signal switching applications. Its compact design and DIN rail mounting make it suitable for high-density electrical installations, offering quick maintenance and easy replacement. Maintenance engineers value the PLC-RSC-12DC/21-21 for its long mechanical life, fast switching times, and stable operation under variable voltage conditions. Built for universal use, it supports automation processes in manufacturing, utilities, and control system engineering.
The Phoenix Contact PLC-RSC-12DC/21-21 (2967235) is a robust relay module trusted for precision, reliability, and longevity in industrial control systems. Engineered for efficient 12V DC switching, the plc-rsc-12dc-21-21-2967235 ensures stable performance, low energy consumption, and seamless integration into PLC and automation setups. Compact and dependable, the Phoenix Contact PLC-RSC-12DC/21-21 offers safe isolation, superior contact reliability, and proven durability, making it the preferred choice for engineers seeking long-term performance in electrical and automation environments.
