Johnson Controls A350A Series, A350B Series Catalog Page

A350A/B Series

Setpoint

Dial

Module

Connector

Relay

Differential

Potentiometer

Relay

Energized

LED Indicator

COM N.O.N.C.

Jumper Block

Position

Heating

Cool ing

24V

COM VDC

SEN

Mounting S lot

For #6 Screws

1.20 31

2.40 61

0.42 11

1.56 40

0.145

3.68

4.00 102

A350

Conduit

Hole

0.85 22

5.00 127

2.40 61

2.94 75

0.5 13

DIN Rail

0.875 22

0.85 22

3.00 76

Electronic On/Off Temperature Control

Code No. LIT-1922360 Issued February 1, 2009

Description

The A350A/B Series are On/Off temperature controls with a SPDT relay output and LED indication. These controls are used in conjunction with the A99B Series (PTC silicon) Temperature Sensors.

Two basic models cover a temperature range

Features

• field selectable heat/cool mode

• adjustable setpoint and differential

• surface or DIN rail mounting

• LED indication of relay status

• 5-pin connectors eliminate wiring between modules

of -30 to 250°F with an adjustable differential of 1 to 30F°. A350A controls incorporate Fahrenheit scales; the A350B models have Celsius scales. The S350 Stage, D350 Display, and Y350R Power Modules can be used with the A350A/B.

Accessories

Applications

• frozen/refrigerated food cases

• space temperature control

• cooling tower control

• beverage coolers

• chiller staging

The base silicon sensor (A99BC-25C, not immersible) is included with each A350A/B Control.

Selection Chart

Code Number

A350AA-1C SPDT A350AA-2C 90 to 250°F

A350AA-3C A350BA-1C -35 to 55°C 0.5 to 17C° 0.5 to 17C° A350BA-2C 30 to 121°C

1. Concealed setpoint, only adjustable by removing cover.

Note: Specify code number from this selection chart, along with additional staging, display, and power modules, and temperature sensing enclosures, if required.

Output Range Adj. Diff. Offset Sensor

(Included)

Relay

-30 to 130°F 1 to 30F° 1 to 30F° A99BC-25C

-30 to 130°F

A350

a350bd.eps.eps

Interior of A350A/B

Technical Specifications

A350 Series ON/OFF Temperature Control

Product A350AA

Temperature Range -30 to 130°F (-35 to 55°C);

Differential Range 1 to 30F° (0.5 to 17C°) Supply

Voltage Relays SPDT enclosed relays, contacts rated at 10 amp,

Power Consumption 1.4 VA Maximum Ambient

Temperature Humidity 0 to 95% RH non-condensing

Case and Cover Material NEMA 1, high-impact thermoplastic

1. Only one voltage source may be used.

Relay Ratings

Voltage AC 120 208/240

Full Load Amp 9.8 4.9 Locked Rotor Amp 58.8 29.4 Non-Inductive Amp 10 at 24/240 VAC Pilot Duty --125 V A at 24/240 VAC

The performance specifications are nomina l and con form to accep table ind ustry stand ards. For applicati ons at con ditions be yond these specification s, consult the local Jo hnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2009 Johnson Controls, Inc.

A350BA

Transformer 20 to 30 VAC, 50/60 Hz, Class 2

Y350R 120/240 VAC, 50/60 Hz

Operating -30 to 150°F (-34 to 66°C) Shipping -40 to 185°F (-40 to 85°C)

On/Off Temperature Control with Fahrenheit scale On/Off Temperature Control with Celsius scale

90 to 250°F (30 to 121°C)

non-inductive (resistive), 1/2 hp 120/240 VAC

A350A/B Dimensions, in. (mm)

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a350a2.eps