S2000 15017 Rev H 10/08/96 P/N 15017:H
24
Figure 4-4: Connecting the EIA-485 Interface
EIA-485 Interface
Supervised and Power-limited
EIA-485 (+)
EIA-485 (-)
D
UMMY
-L
OADING
UNUSED
CIRCUITS
ON
THE
CPU
An unused notification circuit must be terminated with
one dummy load resistor.
If the Municipal Box Output is not to be used,
it must be terminated with a dummy load re-
sistor.
4.7K, 1/2-watt Resistor
Part # 71245
4.7K, 1/2-watt Resistor
Part # 71245
T
HE
EIA-485 I
NTERFACE
The Sensiscan 2000 communicates with the AFM serial annunciators through the EIA-485 interface on the CPU. Maximum
distance is 6000 feet and maximum resistance is 100 ohms.
TB2