Installing The Keypads; Keypads That May Be Used; Wiring To The Keypads - ADEMCO VISTA-128B Installation And Setup Gude

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In This Section

Keypads That May Be Used

Wiring to the Keypads

Using a Supplementary Power Supply to Power
Additional Keypads
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Keypads That May Be Used
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ADEMCO 2-line alpha display keypads.
•
Up to 16 addressable keypads may be used in the system, independent of auxiliary power
considerations (you may need to use an auxiliary power supply if the 750mA aux. output
is exceeded)
Wiring to the Keypads
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The length of all wire runs combined must not exceed 2000 feet when unshielded quad
conductor cable is used (1000 feet if unshielded cable is run in conduit or if shielded cable is
used).
•
If more than one keypad is wired to a run, then the above maximum lengths must be divided
by the number of keypads on the run (e.g., the maximum length is 225 feet if two keypads are
wired on a #22 gauge run).
To wire the keypads to the control, perform the following steps:
Step
1
2
3
4
Action
Determine wire gauge by referring to the following wiring length/gauge table:
Wire keypads to a single wire run or connect individual keypads to separate wire
runs. The maximum wire run length from the control to a keypad, which is
homerun back to the control must not exceed the lengths listed in the table.
Run field wiring from the control to the keypads (using standard 4-conductor
cable of the wire gauge determined in step 1).
Connect the keypad(s) to terminals 6, 7, 8, & 9 on the control board, as shown in
Figure 5-1.

Installing The Keypads

Mounting the Keypads
Addressing the Keypads
Wire Run Length Table
Wire Gauge Length
#22 gauge 450 feet
#20 gauge 700 feet
#18 gauge 1100 feet
#16 gauge 1750 feet
S E C T I O N 5
5-1