Phoenix Contact PLC-BPT-24DC/21 Relay Base, Push-in

Technical Overview

24 V DC relay base with 1 changeover contact, featuring Push-in connection for 26-14 AWG conductors. Mounts on DIN rail, 6.2 mm wide. Operates -40 °C to 60 °C.

Key Features

Push-in connection technology for rapid and secure wiring
Space-saving 6.2 mm housing design for high-density applications
Designed for DIN rail mounting (NS 35/7,5)
Accommodates plug-in electromechanical or solid-state relays
Features 1 changeover contact (SPDT) configuration
Nominal input voltage of 24 V DC
100% touch-proof design for enhanced safety
Compatible with plug-in bus bridges for potential distribution

Technical Specification Matrix

Parameter	Value
Nominal Input Voltage	24 V DC
Mounting Type	DIN Rail NS 35/7,5
Connection Method	Push-in connection
Contact Type	1 changeover contact (SPDT)
Conductor Cross Section Rigid (min)	0.14 mm²
Conductor Cross Section Rigid (max)	2.5 mm²
Conductor Cross Section Flexible (min)	0.14 mm²
Conductor Cross Section Flexible (max)	2.5 mm²
Conductor Cross Section AWG	26 ... 14
Stripping Length	10 mm
Operating Temperature	-40 °C ... 60 °C
Storage/Transport Temperature	-40 °C ... 85 °C
Protective Circuit	Damping diode, polarity protection diode
Status Display	LED
Physical Weight (kg)	0.03
Dimensions L x W x H (cm)	9.4 x 0.62 x 8

Industrial Applications

1. Industrial Control Panel Interfacing

This relay base serves as an interface between a Programmable Logic Controller (PLC) with 24V DC outputs and various loads (e.g., contactors, pilot lights, small motors) within an industrial control panel. It ensures reliable signal isolation and power amplification.

Problem Solved

Provides robust signal isolation and power amplification for sensitive PLC outputs, protecting the PLC from load-side disturbances and enabling control of higher current loads. Its 6.2 mm width optimizes space in crowded control cabinets, while push-in terminals streamline wiring, reducing installation time and potential errors.

PLC interfacingsignal isolationpower amplification24 V DCDIN rail mountingspace-savingpush-in connection

2. Building Automation Systems (BAS) for HVAC Control

Integrates low-voltage 24V DC control signals from Building Automation Systems (BAS) to switch higher AC or DC loads in HVAC systems, such as fan relays, damper actuators, or pump contacters.

Problem Solved

Offers essential voltage and current translation, allowing the 24V DC BAS logic to safely control higher power HVAC loads indirectly. Its compact design facilitates installation in crowded electrical enclosures, and push-in technology ensures quick, secure connections during system setup and maintenance in commercial buildings.

Building automationHVAC control24 V DCsignal translationcompact designpush-in terminalsload switching

3. Machine Safety Circuit Expansion

Utilized in machine safety applications to expand 24V DC safety relay outputs for controlling multiple safety-related devices, such as enabling contactors for several motor drives, while maintaining a compact footprint.

Problem Solved

The narrow 6.2 mm width enables high-density installation within safety control cabinets, critical for complex machinery. It provides a reliable DIN rail mountable platform for plugging in safety-rated relays, extending the output capabilities of safety PLCs or safety relays, and simplifies wiring with push-in technology, ensuring reliable and maintainable safety circuits.

Machine safetysafety circuit expansion24 V DCDIN rail mountinghigh-densitypush-in connectionrelay interface