TAC Pneumatic Products Catalog

R540 (2376-501)
TAC PNEUMODULAR � Averaging Relay
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.
Features:
• 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.
Model Chart
Model No.
Wholesale
Model No.
R540 2376-501 a
a Includes plastic mounting strap and adhesive backed mounting plate.
Port Connections
Port Connected to
M Main air
B Branch output
S1 Input signal no. 1
S2 Input signal no. 2
Specifications
Action Proportional.
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
S2 M B S1
Output may be advanced or retarded �10 psig (69 kPa) by means of TOOL-082 (5/64 in. hexhead
wrench).
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).
108 © Copyright 2006 TAC. All Rights Reserved. F-27383-1
R540
(2376-501