Eaton MPAD-C-A Product Manual

Overview

Features

Back features

Ceiling Microwave presence/absence detector 12-24V AC/DC

MPAD-C-A 12-24V

Microwave Sensor

Detects movement within the unit’s detection range,
allowing load control in response to changes in occupancy.

IR Receiver

Receives control and programming commands from an
IR (infrared) handset.

Light Level Sensor

Measures the overall light level in the detection area

Status LEDs
The LED flashes Red to indicate the following:

Power Input & Output Connector

Used to connect power to the unit and to connect a
switched load.

Switch Input Connector

Two input terminals can be used to manually override the
lights on or off.

Walk Test LED active

when movement is detected

Valid setting received

Retaining Spring

Retaining Spring

Power Input &
Output
Connector

Switch Input

Connector

Front features

The MPAD-C-A 12-24V Microwave presence detector
provides automatic control of low voltage loads including
lighting and BMS systems with optional manual control. The
MPAD-C-A 12-24V detects movement using a highly
sensitive microwave detector. This works by emitting low
power microwave signals and measuring the reflections as
the signals bounce off moving objects.
Functioning as a presence detector, the unit can turn lights
on when a room is occupied and off when the room is
empty. Optional settings allow lights to be turned off in
response to ambient daylight.
The MPAD-C-A 12-24V has a unique adjustable sensor
head that allows the area of detection to be optimised for
the application.
All functionality is fully programmable using an IR handset.

Sensor Lens

which covers...

Microwave Sensor

IR Receiver

Light Level Sensor

Status LEDs

Mounting Bezel

Product Guide

2

Detection diagram

Detection Mode

The Detection Mode can be set to behave in Presence or Absence mode:
 Presence When movement is detected the load will automatically turn on. When the ar ea is no longer

occupied the load will automatically switch off after an adjustable time period.

 Absence The load is manually switched on. When t he area is no l onger occupied the load w ill automat ical ly

switch off after the adjustable time period has elapsed.

In either case, sensitivity to movement of the Microwave sensor can be adjusted using the Sensitivity parameter.

HINT: To assist in setting the Sensitivity, turn on the Walk Test LED which will flash red when movement is detected.

Switch Level On/Off

Occupancy detection can be made dependant on the ambient light level using the Lux On Level and Lux Off Level
parameters.

Sensor functionality

Ideal for large office or classroom

Ideal for corridor or aisle applications

Ideal for open plan areas and offices

Note. If the range is compromised by the ceiling construction /
material. Add the supplied 20mm spacer ring. See page 4 for
fitting details.

3

Installation

Absence detection

 To use absence detection a retractive (momentary) switch must be connected between the 2 terminals on the

diagram.

 The unit ships with presence detection as default. To change to absence detection, press and release the external

switch 5 times within the first minute of power up. The LED will turn on solid for 30 seconds to indicate absence
mode has been selected.

 To change back to presence detection, repeat the above procedure—the LED will flash for 30 seconds to indicate

presence mode has been selected.

Note: th e above adjus tment s can also be made using the HHIR-PROG or HHIR-LCD-PROG handsets. See

When power is applied to the unit, the load will turn on immediately.

Set the timeout to 10 seconds, vacate the room or remain very still and wait for the load to switch off .

Check that the load switches on when movement is detected.

The unit is now ready for programming.

Power-up test procedure

Choosing a Suitable Location

The detector should be sited so that the occupants of the room fall inside the detection pattern shown opposite).

 Avoid positioning the unit where direct sunlight may enter the sensor element.

 Do not site the sensor within 1m of any lighting, forced air heating or ventilation.

 Do not fix the sensor to an unstable or vibrating surface.

 Avoid metallic objects directly in front of the sensor head.

Input and switch connections

OUT

+

COM

MOMENTARY PUSH TO

MAKE SWITCH

Optional for presence,

mandatory for absence detection

OUT

+

COM

INTERNAL OPEN

COLLECTOR

TRANSISTOR

LOAD

OUT

+

COM

AC Supply

10VAC - 26.5VAC

MOMENTARY PUSH TO

MAKE SWITCH

Optional for presence,

mandatory for absence detection

DC Supply

11.5VDC - 36VDC

OR

-

+

INPUT & SWITCH
CONNECTIONS

Load connections