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CLI-REL1AUX1-00  |  009-1805-00  |  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

RS-485 communications is not estab-

lished. Once power is applied, it can take 

up to 20 seconds to establish communi-

cations.

 

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. 

Module is communicating with thermo-

stat.

B

Climate Relays

 - The relay outputs on this module operate 

similar to the relays of the same name on the thermostat. 

Connect the relay outputs (W1, W2, Y1, etc) to the appropri-

ate connection on the HVAC system equipment. Refer to the 

Relay Connections

 section when making the connections.

Climate Relay LEDs

 - The LEDs associated with each relay 

will light when the relay is energized and be off when relay is 

in its idle state.

C

Auxiliary Relay

 - An additional relay is available for con-

trolling external HVAC equipment such as a vent damper, 

humidifier, or dehumidifier. Refer to the 

Auxiliary Relay Con-

nections

 section on the next page for wiring information.

D

24V AC input

 - To power the module as well as supply power 

to the W1, W2, and O relays, connect a 24V AC transformer 

between the C and RH terminal. To supply power to the Y1, 

Y2, and G relays, add a jumper between the RH and RC ter-

minals or connect a separate 24V AC source between the C 

and RC terminals. See the 

Power Connections 

section on next 

page for wiring information.

A

RS-485 Port

 - As shown above, the right three pins connect 

to the RS-485 terminals in thermostat. Refer to the 

RS-485 

Connections

 section on the next page for more information.

(1) 

HVAC Relay Module - (CLI-REL1AUX1)

(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 (009-1707)

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 

0.2 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-REL1AUX1

3.77 inch 

(9.58 cm)

3.16 inch 

(8.03 cm)

.91 inch 

(2.31 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

Relay

Status

W1

W2

Y1

CLI-REL1AUX1-00

S/N:

UID:

SHR180901332

001AAE09CA2D0065

Y2

G
O

Aux

Com

NO

NC

C

RH
RC

C

D

A

Gnd

N/C

N/C

N/C

B (TX-)

A (TX+)

Relay Module with One 6-Port Climate Relay and One Aux Relay

Quick Reference Guide

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