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Johnson Controls S350A Series Temperature Stage Module

Temperature Stage Module
S350A Series

The S350 Stage Module is used in conjunction with the A350, A350E, A350P, and A350R series temperature controls to add multiple stage capability. The S350 module has an SPDT output relay and three adjustments including offset (de-energize stage action from setpoint), heating or cooling mode, and differential. Using a Y350R, up to nine S350As can be added to the A350, A350E, and A350R via the 5-pin, plug-together connector. Using a Y350R with an A350P, up to four S350As can be added. Using a 40 VA or greater external transformer with an A350P, up to nine S350As can be added.



• heating or cooling mode, field-selectable jumper
• adjustable differential and offset
• 5-pin connector eliminates wiring between modules




Select a link under the "item" tab below to order.

Cat #OutputDifferential AdjustmentOffset Adjustment
S350AA-1CSPDT Relay1 to 30F°1 to 30°F
S350AB-1CSPDT Relay0.5 to 17C°0.5 to 17°C
Product: D350AA Temperature module with Fahrenheit scale
D350BA Temperature module with Celsius scale
Case and Cover Material: NEMA 1, high-impact thermoplastic
Supply Voltage: 24 volt power supply provided by A350 or Y350R
Power Consumption: 1 VA Maximum
Ambient Temperature: Operating -30 to 140°F (-34 to 60°C)
Shipping -40 to 167°F (-40 to 75°C)
Humidity: 0 to 95% RH non-condensing
Relay: SPDT enclosed relays. Contacts rated at 10 amp non-inductive, 1/2 hp, 120/240 VAC
Mounting: Surface or DIN rail

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