FANs 121, 125
Relays and Contactors Section
R
Technical Bulletin
R45
Issue Date
0882
© 1982 Johnson Controls, Inc.
1
Part No. 24-4229-5, Rev. —
Code No. LIT-121565
R45 Series
Electronic Interface
Application
These electronic interfaces are
for installations where a mixture
of Johnson Controls
CYBERTRONIC
®
and R41 or
R48 economizer equipment is
required.
Features
•
provides flexibility
•
adds new capability
•
easy to wire and install
•
simple to adjust
General Description
The R45AA and R45AB interfaces
allow the economizer control
signal to control one or more
CYBERTRONIC controlled
devices.
They convert the R41 or R48
economizer's +2 to +18 V.D.C.
signal into the 0 to -16 V.D.C.
signal needed to operate the
CYBERTRONIC products.
The R45GA and R45GB
interfaces allow the
CYBERTRONIC control signal to
control one or more economizer
devices. They convert the
CYBERTRONIC 0 to -16 V.D.C.
signal into the +2 to +18 V.D.C.
signal needed to operate
economizer products.
The electronic interfaces also
match the impedances to the
two product lines.
Installation
These interfaces have two holes
for mounting in a standard 2 in. x
4 in. switch box. Prior to final
mounting, the calibration
procedure should be performed.
Fig. 1 -- R45 Electronic Interface.
They mount with transformer,
adjustment potentiometer, and
wire leads inside the switch box.
An insulating shield covers the
board to prevent shorting when
the cover is screwed down on
the box. (See Fig. 2.)
Wiring
!
CAUTION: Disconnect
power supply before wiring
and mounting connections
are made to prevent
electrical shock and
possible damage to the
equipment.
All wiring must be in accordance
with local regulations and
Electrical Codes.
The interfaces are supplied with
color coded wire leads. See
Figs. 3 and 4 for wiring
diagrams.
Specifications
