PHOENIX CONTACT PLC-BSC-12DC/21 2966896 / 2961150

Phoenix Contact 12V DC DIN-Rail Relay Module

Description

This is a PLC-INTERFACE module from Phoenix Contact, combining the PLC-BSC-12DC/21 basic terminal block with a plug-in miniature relay (REL-MR-12DC/21). This compact unit is ideal for galvanic isolation and signal amplification in industrial control cabinets. Its slim 6.2 mm design allows for space-saving installation on a standard DIN rail.

Specifications

• Manufacturer: Phoenix Contact
• Base Model (Socket): PLC-BSC-12DC/21
• Relay Model (Plug-in): REL-MR-12DC/21
• Nominal Input Voltage: 12V DC
• Contact Type: 1 N/O (Normally Open)
• Maximum Switching Voltage: 250V AC/DC
• Limiting Continuous Current: 6 A
• Connection Method: Screw connection
• Mounting Type: DIN rail: NS 35/7,5

Label Info

• Base Order Number: 29 66 896
• Relay Order Number: 2961150

Application

Designed for universal use in automation, machine building, and process control. It serves as a reliable interface between PLC outputs and field actuators, or for coupling signals between different voltage levels.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this reused component, you are helping to avoid approximately 0.9 kg of CO2 emissions associated with the production of a new one.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?

What is the advantage of using a plug-in relay like the one in the PLC-BSC-12DC/21 module?

The primary advantage is ease of maintenance. If the relay fails, you can quickly replace just the plug-in component (REL-MR-12DC/21) without having to unwire the entire base from the DIN rail, minimizing downtime.

Question?

Is this module suitable for switching inductive loads like small motors or solenoids?

Yes, the AgSnO (Silver Tin Oxide) contacts are designed for good performance with both resistive and moderately inductive loads. However, for highly inductive loads, it’s always recommended to use an additional protective circuit like a freewheeling diode or RC snubber to protect the contacts and extend their lifespan.

Question?

Can I use a different 12V DC relay in this PLC-BSC-12DC/21 base?

It is strongly recommended to only use the specified Phoenix Contact REL-MR series relays. While other relays might physically fit, using a non-specified relay can lead to improper connection, overheating, or failure, and would void any certifications or warranties.

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Last Update: Friday, March 13, 2026