Product Overview

Pneumatic Control Manual 717.1
Comparators, Cumulators, and Relays Section
Product Bulletin R-2080
Issue Date 0377
© 1977 Johnson Controls, Inc.
1
Part No. 24-4698-9, Rev. —
Code No. LIT-7171460
R-2080
1:1 Booster Relay
The R-2080 operates as a
pneumatic repeater and volume
amplifier. The pilot signal
received by the R-2080 is
repeated at its output at a
1:1 ratio. The pilot signal,
usually from a non-relay (low
volume) controller, is amplified
to a large volume output signal
to either improve the response
time of a controlled device or to
operate additional controlled
devices. The R-2080 develops
an accurate, direct acting 1:1
relationship between pilot and
output pressures over its
operating range.
Operation
Pilot and output air chambers, of
equal diameter, are on opposite
sides of a single diaphragm
resulting in an accurate 1:1 ratio
of input to output pressure. An
increase of pressure to the pilot
chamber will cause the supply
air valve to open. This will allow
supply air to the output air
chamber and the output
connection. When the output
pressure is equal to the pilot
pressure, equilibrium is reached
in the two chambers and the
output pressure will be
maintained until the pilot
pressure changes. If the pilot
pressure decreases, an exhaust
port in the output chamber will
be opened to exhaust the output
air until both chambers again
have equal pressure.
Installation
R-2080 1:1 Booster Relays are
intended primarily for in-line
mounting with provisions for a
panel mounting bracket. Supply,
output and pilot connections are
marked on the instrument and
are designed to accept 5/32 in.
O.D. or 1/4 in. O.D. polyethylene
tubing. Both output and pilot
pressures can be tested with the
standard (X-200-140)
hypodermic needle test probe.
The R-2080 should be installed
in a position so that test points
are easily accessible for testing
of chamber pressures.
R-2080 1:1 Booster Relay
(Shown Actual Size)
Specifications