Product Overview
The Phoenix Contact PLC-RSC-24DC/21 is a slim DIN-rail interface-relay module used to isolate and switch signals between PLCs, alarm systems, control circuits and field equipment.
The complete assembly includes a PLC-BSC screw-terminal base, plug-in miniature power relay, LED indication and integrated coil-suppression circuitry.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Phoenix Contact |
| Product family | PLC-INTERFACE |
| Model | PLC-RSC-24DC/21 |
| Full part number | 2966171 |
| Input voltage | 24 VDC |
| Input-voltage range | 18.5–33.6 VDC |
| Typical input current | 9 mA |
| Contact arrangement | 1 changeover contact / SPDT |
| Continuous contact current | 6 A |
| Maximum switching voltage | 250 VAC/DC |
| Maximum AC resistive load | 1,500 VA at 250 VAC |
| Maximum inrush current | 10 A for four seconds |
| Typical operate time | 5 ms |
| Typical release time | 8 ms |
| Operating indicator | Yellow LED |
| Relay construction | RT III sealed |
| Contact material | AgSnO |
| Mechanical life | Approximately 20 million cycles |
| Mounting | NS 35/7.5 DIN rail |
| Connection | Screw terminals |
| Module width | 6.2 mm |
| Protection | IP20 |
| Operating temperature | −40°C to +60°C |
| Approximate net weight | 31 g |
Main Features
- Complete relay-and-terminal-base assembly
- Slim 6.2 mm panel width
- Replaceable plug-in relay
- Integrated yellow operating LED
- Reverse-polarity protection
- Integrated freewheeling diode
- Safe isolation between coil and contact sides
- Functional plug-in bridging
- Sealed RT III relay construction
- Suitable for continuous operation
Included Components
| Component | Part number |
|---|---|
| Basic screw-terminal relay base | PLC-BSC-24DC/21 — 2966016 |
| Replacement plug-in relay | REL-MR-24DC/21 — 2961105 |
| Complete assembled module | PLC-RSC-24DC/21 — 2966171 |
Marine and Industrial Applications
- Vessel alarm-monitoring systems
- PLC output isolation
- Machinery control panels
- Pump and fan controls
- Solenoid-valve switching
- Boiler and incinerator systems
- Generator auxiliary controls
- Interlocking and shutdown circuits
- Motor-control centres
- Retrofit automation panels
