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CLI-AUX3-00  |  009-1799-00  |  190613 

Copyright 2019 Savant Systems, LLC

45 Perseverance Way, Hyannis, MA 02601 

Savant.com

  |  508.683.2500

1     of     2

Top Panel

Left Side Panel

A

Blinking Green

Communications with thermostat is not 

established (RS-485). Once power is 

applied, it can take up to 20 seconds to 

establish communications.

HELPFUL!

 If communications was es-

tablished and subsequently lost, 

the LED will stay solid for about 1 

minute before it starts blinking.

.5s

1s

1s

Repeat

.5s

Solid Green

RS-485 communication is established 

and the module is communicating with 

thermostat.

B

Aux 1-3 Relay Inputs

 - Each Auxiliary port (Aux 1, Aux 2, Aux 

3) contains a relay that can toggle between a normally open 

and normally closed terminal. These relays can be used to 

control external equipment such as a vent damper, humidifier, 

or dehumidifier. See the 

Auxiliary Relay Connections

 section 

on next page for wiring examples.

C

24V AC input

 - Connect 24V AC from HVAC transformer or 

similar to power the module. Input power is an AC signal so 

polarity is not observed.

A

RS-485 port

 - As shown in the image above, the right three 

pins connect to the RS-485 ports in thermostat. No connec-

tions are made to the leftmost 3 pins. Refer to the 

RS-485 

Connections

 diagram for more information on wiring.

(1)  HVAC Auxiliary Relay Module - (CLI-AUX3)
(2)  3 Position Screw Down Plug-In Terminal Block (028-0736)
(1)  6 Position Screw Down Plug-In Terminal Block (028-0737)
(1)  6 Position Screw Down Plug-In Terminal Block (028-9352)
(1)  Product and Regulatory Insert (009-1705)

Box Contents

Specifications

Environmental

Temperature

32° to 104° F (0° to 40° C)

Humidity

10% to 90% Relative Humidity (non-condensing)

Power

Input Power

24V AC (19.2 - 28.8V AC)

Max Current Draw

.1 amps (rms)

Maximum Wiring Distances

RS-485

Up to 1000 feet (304.8 meters) cumulative.

Power

#24 AWG - 20 feet (6.10 meters)
#20 AWG - 57 feet (17.37 meters)
#18 AWG - 90 feet (27.43 meters)
#16 AWG - 143 feet (43.59 meters)
#14 AWG - 228 feet (69.49 meters)

Minimum Supported Release

Climate Config App

Version 1.1.2

Regulatory

Safety and 
Emissions

FCC Part 15

Contains FCC ID:

2AEHU-MESHTEK-H52

Contains IC:

20059-MESHTEK52

RoHS

Compliant

Dimensions and Weights

Height

Width

Depth

Weight

CLI-AUX3

3.77 inch 

(9.58 cm)

3.16 inch 

(8.03 cm)

.91 inch 

(2.3114 cm)

< 1 lbs 

(< .5 kg)

Shipping

6.25 inch 

(15.88 cm)

4.8 inch 

(12.19 cm)

1.25 inch 

(3.18 cm)

< 1 lbs 

(< .5 kg)

A

B

C

Aux Relay

Status

24VAC

Aux 1

Com

NO
NC

CLI-AUX3-00

S/N:

UID:

SHA180201332

001AAE09442D0000

Aux 2

Com

NO
NC

Aux 3

Com

NO
NC

~
~

A

Gnd

N/C

N/C

N/C

B

A

Relay Module with Three Aux Relays

Quick Reference Guide

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