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Black Box LD485A
17
VAC
BIAS
S3
J11
J13
J10
J12
4W 2W
J14
J9
485 232
Intelligent System Controller
2-wire RS-485
S1
A B C D
E
A B C
TERM.
S2
XW1B
XW1A
25-Pin Serial Connector
7
3
2
J6
J4
J2
J3
Hardware Installation Guide
Black Box LD485A
17
17VAC
BIAS
VAC
S3
ISC panels can be multidropped
on the RS-485 line using this
configuration. Follow typical EOL
termination
5
DB 9 Pin
9 or 25 Pin Connector
S1
A
C
E
B
D
A
B C
TERM.
S2
XW1B
XW1A
25-Pin Serial Connector
7
3
2
2
3
7
3
2
DB 25 Pin
Male
Female
Workstation (PC)
245
revision 7 —
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