Electrical Connections - Honeywell AQS51 Installation Instructions Manual

Co2 / temperature sensor with built-in controller for wall mounting

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Table Of Contents

Table of Contents

Removing System Unit from Wall Plate

Fig. 4. Removing the wiring terminal cover and the

sensor/controller

Loosen the screw on top of the wiring terminal cover and

remove the wiring terminal cover from the wall plate (see

Fig. 4).

Pull out first the bottom of the sensor/controller, then

disengage the top tabs and remove the top.

Wiring

G+ G0 OUT1 OUT2

R/T

GND

+5 V

RXD

TXD

startpoint

selection

jumper

digital input

Fig. 5. Connections and jumpers on AQS51/61. The

shaded positions represent the default settings

CAUTION

Check that all wiring is correctly completed before

turning the power on! Do not connect wires when the

unit is powered. Do not detach the sensor/controller

from the wall plate when the power is on!

The AQS51/61 signal ground (M) is not galvanically

separated from the power supply G0 terminal. If the analog

output signals are connected to controllers or DDC systems,

these units must have the same ground. If necessary, use

AQS 51/61 CO2 / TEMPERATURE SENSOR WITH BUILT-IN CONTROLLER

normally-open

relay

OUT4

OUT1 OUT2 OUT4

separate floating transformers for sensor and controller /

DDC system.

Connect the correct wires to the terminals and securely

tighten each terminal screw. Follow the actual job wiring

diagrams if available or refer to Table 2 for terminal

designations. A sticker is located on the inside of the

terminal cover that identifies the terminals (see Fig. 5).

All wiring must comply with local electrical codes,

ordinances and regulations.

Place the wiring terminal cover by fitting the notches of

the cover into the hooks of the wall plate. Tighten the

locking screw (see Fig. 6).

Fig. 6. Installing the wiring terminal cover