-a
,Simplex
210012120
Multiplex Interface
Installation Instructions
DESCRIPTION
Printed Circuit Boards
A 2100/2120 interface Kit is required for each 2100 transponder which will be required to communicate with a
2120 BMUX. This kit consists of two printed circuit boards which will replace the 2100 Transmission and the
Controller boards in the 2100 transponder. The new Communications board can be identified by two yellow and
one red LED on the outside edge of the board. The new Controller board has a single green LED on it and also
contains an 87C51 microcontroller IC.
Transient Protection
A Simplex Model 2081-9027 Isolated Loop Circuit Protector is required on both sides of any communications line
that leaves the building.
Distance Restrktions
If the 2100 transponder is located more than 10,000 feet (1.9 miles) from the BMUX, a DC repeater or a modem
is required.
Related Documents
1. 2100 Multiplex Transponder Parts List MUX1 -81-002
2. 2100 Multiplex Installation Instructions 575-544
INSTALLATION PROCEDURES
Transponder Preparation
1.
2.
3.
4.
5.
Disconnect the AC power and batteries from all
transponders.
Remove the DC transmission board and the
controller board from each 2100 transponder.
l
See Figure 1 for board locations.
Disconnect all lines from the 2100 CPU and
connect them to the (replacement) 2120.
Install Model 2098-2097 Isolated Loop Circuit
Protectors on any DC communication lines that
leave the building.
(If called for) Install any repeaters or modems on
the communication line.
l
Be sure that the polarity of the communication
lines are correct. (The A and A’ lines are
positive and the B and B’ lines are negative. If
using McCulloh, the A’ and B’ terminals are the
primary connections.)
POWER SUPPLY
P.C. BD
TRANSMISSION
P.C. BD”
CONTROLLER
P.C. BD*
ENCODER
P.C. BD’S
l
THESE P.C. BOARDS TO BE REPLACED.
Figure 1
2100 Transponder
c 1999SimplexTime Recorder Co., Gardner. Mass. 01441-0001 U.S.A.
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