90 UDACT Instruction Manual — P/N 50050:M 12/18/2009
NFS2-640, NFS-320, (UL 9th) and NFS-640 (UL 8th) Wiring
Below is an internal installation of a UDACT with NFS2-640/NFS-320:
Figure F.2 UDACT and NFS2-640/NFS-320 in the Same Cabinet
Below is a remote installation of a UDACT with an NFS-640:
Figure F.3 UDACT and NFS-640 in Separate Cabinets
EARTH
Comm FAILUR
+24V
+24V
GND
RS+
RS–
SHIELD
RS+
Rs–
ACS/TERM
TERM
0
1
11
Ferrite Core
To Phone Lines
(supervised)
Solid Earth
Ground
Connection
DO NOT USE
CPU2-640/
CPU-320 TB11
CPU2-640/
CPU-320 TB10
24VDC
nonresettable
power
UDACT-24.cdr
EARTH
Comm FAILURE
+24V
+24V
GND
RS+
RS–
SHIELD
RS+
Rs–
ACS/TERM
TERM
To Phone Lines
(supervised)
Solid Earth
Ground
Connection
NFS-640 in
Separate Cabinet
CPU-640
TB13
UDACT-13a.cdr
DO NOT USE
Ferrite Cores
CPU-640 TB7
24VDC
nonresettable
power
+
-
UDACT
ABS-8RB or UBS-1
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