DCEC12S, DCEC24S, DCEC12D, DCEC24D (Obsolete)
Direct Current Electronic Clutch 12 or 24V Single / Double Motor

Features • 4 Versions: 12V / 24V Single / Double Motor Application • Control an automatic door or gate DCEC12D DCEC24D

Click image to enlarge Download DCECxxS Datasheet DCECxxD Datasheet Description Installation Block Diagram Changing Speed Comparison Charging Circuit

Description

The DCECS comes in four versions: for 12V single motor, 12V double motor, 24V single motor and 24V double motor. It is designed to control an automatic door or gate that uses a single DC motor and no limit switches. Not using any limit switches to stop the motor is what makes the DCEC controller unique. This is made possible with an electronic clutch built into the controller.

The DCEC has a built-in push button, photocell control and lock control. Optional wireless operation is available with a plug in receiver.

The DCEC12S is also available with a C220 plastic case. This is called a DCEC12SE, DCEC12DE, DCEC24SE or DCEC24DE.

Options, Auto Closing, Open Only and Security Closing are user selectable using the on board 2-way dip switch. See table below:

Auto Closing
Enabled when switch 1 is on. The Auto Close timer can be adjusted from 6 to approximately 30 seconds by the on board trimpot called AC. Auto Close timer starts when the door/gate is opened and stopped. Input from the Photo Cell will hold-off the closing cycle, i.e. auto close timer is reset on a photo cell input.

Open Only
Enabled when switch 2 is on. This feature enables the user to open the door/gate but when the door/gate is opening the remote control is disabled and the door will fully open. Door closes when auto close timer expires.
Security Closing
Enabled when switch 1 and 2 are on. The door/gate immediately closes after the photo beam is broken and the vehicle moves away from the photo beam, even if the door/gate is not fully open.

If the door/gate is opening and no vehicle passes through the door/gate then Auto Close will close the door/gate. An Auto Close time of 1 to 30 seconds can be set on the DCEC board using the trimpot marked AC.

Other Features
M1 Overload Trimpot
The trimpot labeled M1 sets the amount of overload. Turn clockwise for more overload power, anti-clockwise is less overload power.

Red LEDs
Red LED O/L indicates that an overload has been detected. DCEC card will stop motor after 1.5 seconds of overloading.

Red LED OLR indicates the door/gate travel distance in which reversal of motor will occur if an overload condition results. This condition is indicated when the LED is “on”. When LED flashes and an overload condition occurs the door /gate will stop.

Overload Travel Range (OLR) Trimpot
The overload travel range of 3 to 55 seconds is adjusted by the on board trimpot called OLR. The overload travel range sets the travel distance where the door/gate will overload and reverse. The user should set the travel range to approximately 3 seconds before the door/gate is fully opened or closed.

Slow Speed
The DCEC will slow down before the fully opened or closed position is reached. This position is indicated with the OLR LED blinking.

Replaceable Fuse
Replaceable 240VAC 10 Amp fuse.

Safety Feature
The DCEC has a built-in switch off protection. The motor will switch-off after 60 seconds of continuous running. This is called the maximum run timer.

Installation Instructions

Care should be taken not to cross printed circuit board with 240V wires over or under the board. This would induce spikes onto the sensitive circuitry of the printed circuit board.

The transformer and rectifier used to power the DCEC board should be large enough to power the motor (check motor rating). If an electronic lock is used a larger transformer and rectifier should be used to power both the motor and lock. Note some locks draw as much as 6 amps.

Antenna
The antenna connection is used to connect an antenna for the plug in FMR-201, GLR2701SS or GLR43301SS. The antenna can be a 50 ohms Antenna or piece of approximately 1 metre of wire.

Push Button Input
Push button is a normally open contact. When pressed it will start the opening or closing cycle. This push button should be waterproof for internal and external use. Waterproofing will prevent false activations, which normally occurs due to moisture inside the button. Door or gate can be held open permanently when push button is pressed continuously.

Photo Cell Input
Photo Cell input is normally closed contact. The photocell is used as a safety feature. If the motor is closing and the photo beam is broken, motor will stop instantly and then open fully again. Should an object be blocking the motor (i.e. photo cell is broken), closing cycle or auto closing is disabled.
Power + -
Connect 12VDC (24 VDC for DCEC24S) to the terminal block marked - +.

Motor
Motor should be rated for 12VDC (24 VDC for DCEC24S).

LOCK Output
This terminal block outputs a short pulse of approximately 3 seconds on opening and closing cycle. This is used for a standard 12V lock.

Remote Control
Remote control is achieved by inserting Elsema’s FMR-201, GLR2701SS or GLR43301SS. Power to the DCEC printed circuit board should be switched off during the installation of a receiver. The transmitter can be an FMT-301 GLT2701 or GLR43301SS respectively.

Changing Slow Speed

DCEC12S, DCEC24S	DCEC12D, DCEC24D
The slow speed is factory set to 25 percent of the fast speed. The user can change resistors on the DCECS printed circuit board to change the slow speed to a different speed. For example, slowing the factory setting would require the user to increase the resistor value. Hence, increasing the factory setting to a faster speed would require the user to decrease the resistor value. The resistor value is calculated as two resistors in parallel . The factory values are 10 Kilohms and 4.7 Kilohms. Since they are in parallel the total value is 3.2 Kilohms that is the factory setting of 25 percent slow speed. These two resistors are shown in the diagram above.

Comparison

Block Diagram

DCEC12S, DCEC24S

DCEC12D, DCEC24D

Charging and Battery backup Circuit

This diagram shows how to connect a battery and the BACH Elsema charger to the control card. This gives the added option of battery backup.