Intermediate Relay

INTERMEDIATE RELAY

Introduction

An intermediate relay is an electromagnetic switch that acts as a buffer between a low-power control circuit and a high-power load circuit. It is used to amplify signals, isolate circuits, and split control signals into multiple outputs.

Main Functions:

Signal amplification: Allows small current/voltage signals (e.g., from PLCs or sensors) to directly control heavy load devices like motors or lighting systems.
Electrical isolation: Ensures safety by protecting the central controller from overcurrent and overvoltage issues in the load circuit.
Contact multiplication: From a single input signal, the relay can activate multiple contacts (usually 4 to 8) to control several components simultaneously.

Structure & Classification:

Structure: Consists of an electromagnetic coil, a contact system (Normally Closed NC / Normally Open NO), a spring, and a protective housing.
Classification: Categorized by specifications such as voltage (5V, 12V, 24V DC, 220V AC...) or the number of pins (5 pins, 8 pins, 11 pins, 14 pins).

iLEC Intermediate Relay – Model MR

Features

Compact and durable construction with high dielectric strength.
Transparent cover for clear visibility of internal operations.
Manual test button with locking clip for convenient maintenance (Green: DC, Orange: AC).
Clear mechanical and LED status indicators.
Terminal layout printed directly on the case for easy wiring.
DIN rail or panel mounting options.

Applications

Industrial control panels.
PLC intermediate control & status monitoring circuits.
Control of lights, fans, motors, contactors, and solenoid valves.

General Characteristics
Type	Electromagnetic intermediate relay
Terminal type	Contact meterial
Contact resister	< 50mΩ
Operate/Release time	< 20ms
Insulation resister	≥ 500mΩ (500VDC)
Electrical/Mechanical life	≥ 100.000 times / 10.000.000 times
Operating temperature	-25ºC ~ 55ºC
Humidity	35~85% RH
Atmospheric pressure	86~106 KPa
Dimension (WxHXD)	21 x 42.5 x 27 (mm)
Weight	32~3g
Suitable socket	Model PYF

Technical Data
Model	MR-2-A230	MR-4-A230	MR-2-D24	MR-4-D24
Number of pins	8 pins	14 pins	8 pins	14 pins
Coil voltage	230VAC	230VAC	24VDC	24VDC
Contact configuration	2NO+2NC	4NO+4NC	2NO+2NC	4NO+4NC
Contact rating	10A	5A	10A	5A

DC Coil Data
Rated Voltage VDC	Pickup Voltage VDC	Dropout Voltage VDC	Coil Resistance Ω±10%
5	4.0	0.5	0.5
6	4.8	0.6	0.6
12	9.6	1.2	1.2
24	19.2	2.4	2.4
48	38.4	4.8	4.8
110	88.0	11.0	11.0

AC Coil Data
Rated Voltage VDC	Pickup Voltage VDC	Dropout Voltage VDC	Coil Resistance Ω±10%
6	4.80	1.80	10.5
12	9.60	3.60	46.5
24	19.2	7.20	192
48	38.4	14.4	783
110 / 120	88.0	38.0	4000
220 / 240	176.0	66.0	15000

Dimensions

Wiring diagrams

Product marking

iLEC PYF Series Sockets

Product Appearance

Compact design with high-strength, insulated, and flame-retardant engineering plastic.
Dual-side screw terminal wiring for effortless relay replacement.
DIN rail and screw mounting support for convenient wiring and panel maintenance.
Terminal layout printed directly on the housing for fast and accurate wiring.
PYF08A-E is compatible with MR-2 and standard 8-pin intermediate relays.
PYF14A-E is compatible with MR-4 and standard 14-pin intermediate relays.

Model	PYF08A-E	PYF14A-E
Number of Positions	8 pins	14 pins
Load Current/Voltage	12A 300VAC	7A 300VAC
Dielectric Strength Voltage	2kV	2kV
Wire size (AWG/mm²)	20-16/0.5-1.5	20-16/0.5-1.5
Tightening Torque (Nn)	0.7	0.7
Terminal Ingress Protection	IP20	IP20
Compatible Relay	MR-2 series relays	MR-4 series relays
Product size	22 x 75.5 x 31 (mm)	29 x 75.5 x 31 (mm)
Mounting hole pitch	15 x 59 (mm)	22 x 59 (mm)
Screw Size	2 x M4~M10	2 x M4~M10
Weight	33g	52g