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Johnson Controls R353/S353 Modular Electronic Sequencer

Modular Electronic Sequencer

The System 350™ R353/S353 Modular Electronic Sequencer is designed to provide multi-stage control in HVAC and refrigeration applications. The R353 Signal Input Module accepts input signals of 0 to 10 VDC, 0 to 20 mA, or 135 to 10k ohm slidewire potentiometer to drive up to ten S353 modules. The S353 Stage Modules contain a SPDT relay with an LED indicator of relay status. The sequencer’s modular design provides easy, plug-together connections for quick installation and future expandability. The R353/S353 may be used as a replacement for the Penn R23 Actrol™ Sequencer.

• electronic accuracy and repeatability
• field selectable direct, reverse-acting, or mixing applications
• field selectable time delay
• up to ten S353 stage modules
• wall or DIN rail mounting
• plug-together connection

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

Cat #Descriptions
R353AA-1CElectronic Sequencer Signal Input Module
S353AA-1CElectronic Sequencer Stage Module
Case and Cover Material: NEMA 1, high-impact thermoplastic
Supply Voltage: Transformer 20 to 30 VAC, 50/60 Hz, Class 2
Y350R Input Voltage: 120/240 VAC, 50/60 HZ
Output Power: 24 VDC unfiltered, 10 VA maximum
Power Consumption: R353 1 VA maximum
S353 1.25 VA maximum
Input Impedance: 27K ohms (voltage mode with Resistor R27 clipped); 500 ohms (milliamp mode with Resistor R27 left in place)
Ambient Temp.
(Both Modules)
-30 to 150°F (-34 to 66°C)
-40 to 185°F (-40 to 85°C)
Humidity: Both Modules 0 to 95% RH non-condensing, 85°F maximum dew point
Time Delay: <1, 40, 70, 110 second time constant
Relay: S353AA SPDT enclosed relay. Contacts rated at 10 amp non-inductive, 1/2 hp 120/240 VAC.
Differential: S353AA 1 to 7% of the maximum input signal
Offset Range: S353AA 0 to 75% of the maximum input signal

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