EMC EMC-DMA-2.0 Installation & Operating Instructions Manual

43273_ins_DMA_2.0

Product Identication and Overview

The DMA-2.0 is a door monitor assembly that monitors a
door switch. Green, amber, and red LEDS on the face of
the unit indicate whether the door is closed, open, or has
exceeded its user-selectable open time period.

Leaving the door open for more than the user-selected time
will also energize a buzzer to alert personnel nearby that the
door should be closed immediately. The unit also contains
two auxiliary relays that will energize whenever the door is
opened to alert other user-supplied warning devices or a
building automation system.

A green LED inside the unit illuminates whenever power is
present and red LEDs illuminate when the auxiliary relays
are energized to assist with installation and troubleshooting.

The unit is powered by 24 VAC or 24 VDC.

Mounting

EMC-DMA-2.0

Installation & Operating Instructions

rev. 04/15/19

Fig. 1: DMA-2.0 Unit

Fig. 2: DMA-2.0

Mounting Diagram

Specications

Supply Power: 24 VAC or 24 VDC (UL Listed Class 2 Power Source only)

Power Consumption (max): 7.5 VA @ 24 VAC, 200 mA @ 24 VDC

Auxiliary Relay Contact Rating: 1.0 Amp @ 30V AC/DC

Wire Size: 14 to 22 AWG

Door Switch: Normally closed (NC)

Environmental Operation Range:

Temp: 0° to 60°C (32 to 140°F)
Humidity: 5% to 95% RH non-condensing

Specications subject to change without notice.

Energy Management Consultants, 1550 La Follette Street, Fennimore, WI 53809

Tel. [phone] • Fax [phone] • E-mail: [e-mail] • Web: www.emccontrols.com

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43273_ins_DMA_2.0

N/A None.

Termination

EMC-DMA-2.0

Installation & Operating Instructions

rev. 04/15/19

All terminal blocks are removable/
pluggable connectors.

14 to 22 AWG wire is required for all
connections.

Power: 24 VAC or 24 VDC
(UL Listed Class 2 Power Source only)

Door Switch: Connection is not
polarized.

Auxiliary Relays: Can be connected
as either normally open (NO) or
normally closed (NC).

Buzzer: Remove the cover sticker
prior to use.

Fig. 3: DMA -2.0

Circuit Board

Operation

Relay LEDs (red) Door Switch

Connection

Auxiliary Relay

Connections

Power Connection Power On

Remove

Sticker Prior

to Use!

LED (green)

Basic Operation:

When the door opens, the Door Switch input terminals create an open circuit. The Door Status LEDs on the face
of the unit will change color, both Auxiliary Relays will energize (providing dry contact outputs), and both Auxiliary
Relay LEDs will illuminate. If the door stays open longer than the Door Timer Interval setting, the buzzer will sound.

Closing the door will de-energize both of the Auxiliary Relays, silence the buzzer if it is on, and change the color of
the Door Status LEDs.

The Auxiliary Relays are energized whenever the door is open and de-energized whenever it is closed.

The Door Status LEDs on the face of the unit change colors depending on the conditions listed in the table below.

Door Status LEDs (located on the face of the unit)

Color

Green Solid Closed
Amber Flashing Open Door timer interval has not been exceeded. Close the door when completed with your work.
Amber Solid Closed 5 minute Buzzer Reset Interval has not expired. Avoid opening the door until the LEDs turn green.

Red Flashing Open Door timer interval exceeded. Close the door as soon as possible.

Door Internal Timer:

The user can select how long the door can be continuously open before the buzzer
sounds and the status LEDS turn red. Figure 4 shows the allowable settings. If the
switch is in one of the blank positions, it uses 1 min.

Door Status Additional Condition User Action

Fig. 4: Door Timer

Interval Rotary

Switch (S1)

Specications subject to change without notice.

Energy Management Consultants, 1550 La Follette Street, Fennimore, WI 53809

Tel. [phone] • Fax [phone] • E-mail: [e-mail] • Web: www.emccontrols.com

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