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Schneider Electric R540 (2376-501) TAC Pneumodular® Averaging Relay

TAC Pneumodular® Averaging Relay
R540 (2376-501)

The averaging relay is a proportional device designed for use in pneumatic control systems where the application requires operation of a final control device, or some other control action such as resetting a receiver controller, by the average of the signals from two pneumatic devices. The relay also amplifies the volume of air available to the control device, thereby minimizing system lag.

• Averaging relay (with adjustable bias, factory set to zero). Output equals the sum of the two inputs (S-1 and S-2), divided by two.
• Unlike some competitive bleed-type “averaging relays” (accurate only when the two inputs are equal, and whose accuracy decreases as the square of the signal difference), the R540 is a true averaging relay.
• All ports are clearly labeled. Ports align with MCS-S terminals.
• TAC PNEUMODULAR: Mounts on MCS-Socket or K503 Mounting Bracket.

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Cat #Descriptions
R540TAC PNEUMODULAR® Averaging Relay
Action: Proportion
Construction: Glass-filled nylon
Maximum ambient temperature: 140°F (60°C)
Supply air pressure: Clean, dry, oil free air required (Ref. EN-123)
Nominal: 20 psig (138 kPa)
Maximum: 30 psig (207 kPa)
Connections: Barbed fittings for 1/4 in. O.D. polyethylene or 5/32 in. I.D. polyurethane tubing
Air consumption: 28.8 scim (7.9 mL/s)
Air flow capacity: 230.4 scim (62.9 mL/s)
Adjustments: Output may be advanced or retarded ±10 psig (69 kPa) by means of TOOL-082 (5/64 in. hexhead
Mounting: Designed for use on MCS-S manifold socket. This device can also be mounted by using the optional K502 mounting bracket
Dimensions: 2-1/16 H x 1-7/8 W x 2-33/64 D in. (52 x 48 x 64 mm)

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