Pittway Notifier ACM-8R, Manual, Page: 19 / 40

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Document 15342 Rev D1 07/24/97 P/N 15342:D1
Figure 3-5: Connecting the EIA-485 Loop
Supervised and Power-Limited
AM2020/AFP1010 (SIB-2048)
EIA-485 Common
Earth Ground (chassis)
EIA-485 Loop 1 (+)
EIA-485 Loop 1 (-)
EIA-485 Loop 2 (+)
EIA-485 Loop 2 (-)
EIA-485 (
-
)
to ACM-8R TB2-3
(+) EIA-485
to ACM-8R TB2-2
CPU-500
EIA-485 (
-
)
to ACM-8R TB2-3
(+) EIA-485
to ACM-8R TB2-2
CPU-5000
EIA-485 Connection
The EIA-485 circuit that drives the ACM-8R must be power-limited and connected as
illustrated below.
All connections above must
be power-limited.
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