Entes MCB-20 - Time Relay Manual

Table of Contents

Contents

1 Overview
2 Technical Data
3 Precautions for Installation and Safe Use
4 Documents / Resources
- 4.1 References
- 4.2 Download manual

Overview

MCB-20 time relay uses in industrial and domestic applications with 12-240 VAC/DC wide operating range, adjustable time range from 0.1 seconds to 100 hours and 7 different timing functions.

Device Overview

Time Multiplier Adjustment: It is the time multiplier that the selected time range is multiplied. It is set from 0.1 to 1 with the adjustment trimpot on the device.
Time Range Adjustment: It shows the maximum value of the selected time range. One of 8 different time range is selected according to the operation time to be set.

Operation time = Time range x Time multiplier

Example: If it is wanted to be set operation time to 30 seconds,
T = 100 x 0.3
T = 30 seconds

Function Adjustment: It shows the function of the device.
1. ON Delay: When the supply voltage is applied, the adjusted time t is started to count. After the adjusted t has expired, the output relay switches into ON position. This status remains until the supply voltage is interrupted. If the supply voltage is interrupted before the expiry of the adjusted time, the time already expired is erased and is restarted when the supply voltage is applied again.
2. OFF Delay with Control Input: When the supply voltage and the triggering signal are applied, the output relay switches into ON position. When the triggering signal is interrupted, the time t is started to count and the output relay switches into OFF position at the end of the time. If the triggering signal is applied again before the time t has expired, the time already expired is erased. The time restarts again when the triggering signal is interrupted.
3. Single Shot Leading Edge with Control Input: When the supply voltage and the triggering signal are applied, the output relay switches into ON position and the adjusted time t is started to count. The output relay switches into OFF position at the end of the adjusted time t. During the adjusted time, the triggering signal is not affected the working of the device. At the end of the time t, the triggering signal starts the next cycle.
4. Single Shot Trailing Edge with Control Input: When the supply voltage is applied, applying the triggering signal has no influence on the condition of the output relay. When the triggering signal is interrupted, the output relay swithed into ON position and the adjusted time t is started to count. The output relay switches into OFF position at the end of the time. During the adjusted time, the triggering signal has not affected the working of the device. At the end of the time t, the triggering signal starts the next cycle.
5. ON Delay with Control Input: When the supply voltage and the triggering signal are applied, the adjusted time t is started to count. The output relay switches into ON position at the end of the adjusted time and this status remains until the supply voltage or the triggering signal is interrupted. If the triggering signal is interrupted before the adjusted time t, the counted time is erased. The time is restarted when the triggering signal is applied again.
6. OFF Delay: When the supply voltage is applied, the output relay switches into ON position and the adjusted time t is started to count. The output relay switches into OFF position at the end of the time t. This status remains until the supply voltage is interrupted. If the supply voltage is interrupted before the expiry of the adjusted time, the time already expired is erased and is restarted when the supply voltage is applied again.
7. Symmetric Flasher: When the supply voltage is applied, the adjusted time t is started to count. The output relay switches into ON position at the end of the time t and the adjusted time counts again. The output relay switches into OFF position at the end of the time t. This cycle countinues till the supply voltage is interrupted.
Supply LED: When the supply voltage is applied, ON LED on the device illuminates. When the supply voltage is interrupted, ON LED extinguishes.
1. Function
2. Function
3. Function
4. Function
5. Function
6. Function
7. Function
Relay LED: When the output relay is ON position, OUT LED on the device illuminates. When the output relay is OFF position, OUT LED extinguishes.

Technical Data

Rated Voltage (Un)	12 – 240 VAC/DC
Rated Frequency	50/60 Hz
Output Contacts	1 CO, 8 A, 2000 VA (cosϕ=1)
Terminals	A1(+), A2(-)
Delay Time	0.1 sec – 100 hours
Ambient Temperature	-5°C / + 50°C
Protection Class	IP20
Mechanical Life	1 x 10⁷ OPS
Electrical Life	1 x 10⁵ OPS (8A 250VAC, 85°C resistive load)
Dimensions	Type PK 22
Installation	Surface mounting or on the mounting rails
Weight	57 gr

Dimensions

Connection Diagram

Precautions for Installation and Safe Use

Failure to follow those instructions will result in death or serious injury.

Disconnect all power before working on equipment.
When the device is connected to the network, do not remove the front panel.
Do not clean the device with solvent or the like. Only clean the device with a dried cloth.
Verify correct terminal connection when wiring.
Electrical equipment should be serviced only by your competent seller.
Mount device to panel.

warning
No responsibility is assured by the manufacturer or any its subsidiaries for any consequences arising out the use of this material.

Note: The contact resistance at ohmic load (e.g.: Incandescent bulb, Resistance devices) is 8A. It is recommended to use a contactor if the inductive load (e.g.: AC motor, fluorescent, etc.) or capacitive load (e.g. : Led Drivers, UPS, Fluorescent(Electronic Ballast), etc.) switch. Otherwise adhesion may occur in relay contacts.

ENTES Elektronik Cihazlar Imalat ve Ticaret A.S.
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