Johnson Controls A350A Series, A350B Series Catalog Page
Code No. LIT-1922360
Issued February 1, 2009
A350A/B Series
Electronic On/Off Temperature Control
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 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
The base silicon sensor (A99BC-25C, not immersible) is included with each A350A/B Control.
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
Applications
•frozen/refrigerated food cases
•space temperature control
•cooling tower control
•beverage coolers
•chiller staging
A350
.
Selection Chart
Code |
Output |
Range |
Adj. Diff. |
Offset |
Sensor |
Number |
|
|
|
|
(Included) |
A350AA-1C |
SPDT |
-30 to 130°F |
1 to 30F° |
1 to 30F° |
A99BC-25C |
|
Relay |
|
|
|
|
A350AA-2C |
90 to 250°F |
|
|
|
|
|
|
|
|
||
A350AA-3C1 |
|
-30 to 130°F |
|
|
|
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.
2 4 V |
|
COM |
Setpoint |
VDC |
|
S E N |
Dial |
|
|
Module |
|
|
Connector |
Differential |
|
Jumper Block |
Potentiometer |
|
|
Relay |
|
Position |
Energized |
Relay |
Heating |
LED Indicator |
|
|
|
|
Cooling |
N.C. |
COM |
N.O. |
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Interior of A350A/B
Technical Specifications
A350 Series ON/OFF Temperature Control
Product |
A350AA |
On/Off Temperature Control with Fahrenheit scale |
|
A350BA |
On/Off Temperature Control with Celsius scale |
Temperature |
Range |
-30 to 130°F (-35 to 55°C); |
|
|
90 to 250°F (30 to 121°C) |
Differential Range |
1 to 30F° (0.5 to 17C°) |
|
Supply |
Transformer |
20 to 30 VAC, 50/60 Hz, Class 2 |
Voltage 1 |
|
|
Y350R |
120/240 VAC, 50/60 Hz |
|
Relays |
|
SPDT enclosed relays, contacts rated at 10 amp, |
|
|
non-inductive (resistive), 1/2 hp 120/240 VAC |
Power Consumption |
1.4 VA Maximum |
|
Ambient |
Operating |
-30 to 150°F (-34 to 66°C) |
Temperature |
|
|
Shipping |
-40 to 185°F (-40 to 85°C) |
|
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 VA at 24/240 VAC |
|
|
|
|
0.145 Mounting Slot |
|
|
|
|
3.68 For #6 Screws |
|
|
|
|
0.5 |
|
|
|
|
13 |
|
|
|
|
2.94 |
|
|
|
|
75 |
DIN |
5.00 |
A350 |
|
|
|||
|
|
Rail |
127 |
ON |
|
|
|
||
|
|
|
4.00 |
|
|
|
|
102 |
|
1.56 |
0.42 |
|
|
2.40 |
40 |
11 |
|
|
61 |
|
|
|
|
1.20 |
|
|
|
|
31 |
3.002.40
7661
0.850.85
22 22
0.875 Conduit
22 Hole
A350A/B Dimensions, in. (mm)
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The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2009 Johnson Controls, Inc. www.johnsoncontrols.com
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