Johnson Controls A350AA-2 System 350 Temperature Control [Refurbished]

The Johnson Controls A350AA-2 is a System 350 on/off electronic temperature control. It provides an SPDT relay output with an LED relay status indicator, runs from a 24 VAC supply, and takes its temperature reading from an A99B series PTC silicon sensor mounted remotely from the control.

System 350 is a modular platform: the A350 control carries the setpoint and sensor input, and S350 stage modules, D350 digital setpoint displays and a Y350R power module plug together with it on 35 mm DIN rail to build multi-stage assemblies without additional wiring between devices. Heating or cooling operation is selected with jumper blocks inside the cover - vertical for heating, horizontal for cooling - and the differential is adjustable so the cycle rate can be matched to the equipment. The A350AA models are supplied complete with an A99B series sensor; the -2 covers the high temperature range.

* Brand / Manufacturer: Johnson Controls (PENN)
* Model Number: A350AA-2
* Series: System 350 A350A/B Electronic Temperature Control
* Output: SPDT relay with LED status indicator
* Supply Voltage: 24 VAC
* Modes: Heating or cooling (jumper selectable)
* Setpoint Range: 90 to 250°F
* Adjustable Differential: 1 to 30 F°
* Sensor Included: A99BC-25C, range -40 to 248°F (-40 to 120°C)
* Mounting: 35 mm DIN rail or surface, plug-together connectors

Typical applications include frozen and refrigerated food cases, cooling tower control, beverage and milk coolers, chiller staging and space temperature control, and any multi-stage assembly built from System 350 modules.. Johnson Controls. Johnson Controls. A350AA-2.