Intermatic EMPS3IN Installation Manual

The EMPS3IN is an input card for the EMOPS1 photosen-

sor.  There are inputs for up to three photosensors with 

local adjustment for sensitivity. The EMPS3IN should be 

considered as a switch that sits on the Data bus. Instead 

of switching with button pushes however it switches at spe-

cific light levels which can be programmed. 

Hook-Up

Connect the EMPS3IN to the data bus using Cat. 5 

cable with RJ45 connectors. Note all items on the bus 

must be “daisy chained” and the beginning and end 

items on the bus must have a terminator. If this is being 

added to the bus in the middle this is not a problem. If 

added at the end of the bus make sure the terminator 

is removed from the previously last item to the new last 

item on the bus. 

If the ON LINE LED is not flashing re-check connections 

and crimps. 

Address and define per instructions in the EM1400 

Quick Hook-Up Guide and System and Software Start-

Up Manual.

Connect up to three EMOPS1 photosensors to the 

EMPS3IN inputs using two #18 wires. Note that these 

connections are polarized and must be correctly con-

nected. One may run two #18 wires for a distance of 

up to 1000ft. The wires must never be run in the same 

conduit as high voltage wires. They must also be kept at 

least 12” away from any parallel running conduit except 

when crossing the conduit at right angles. 

1.

2.

3.

4.

Program the EMPS3IN to control the appropriate 

loads. It will show up in the PROGRAM SWITCH Menu 

with the Buttons replaced by TRIGGERs. The loads 

should be programmed as MAINTAIN. Press ENTER 

with MAINTAIN highlighted to get to the trigger setting 

menu. For more complete details see the EM1400 O&M 

Manual.

5.

EMPS3IN

PHOTOSENSOR CARD

INSTALLATION

GUIDE

LIGHTING CONTROL EQUIPMENT

INSTALLING THE EMPS3IN

INTERMATIC INCORPORATED • http://www.intermatic.com

EMPS3IN 

3 input digital photosensor card