Section 3. Installing Remote Keypads; Keypads That May Be Used; Wiring To The Keypads; Wiring Run Chart For Devices Drawing Aux Power From The Control - ADEMCO N7227V5 Installation Instructions Manual

Section 3. INSTALLING REMOTE KEYPADS

This section lists the wired keypads that may be used and provides
instructions for wiring and mounting the keypads.
A preliminary check-out procedure is also provided to ensure that the
connected keypads are functioning properly in the system.

Keypads That May Be Used

• Fixed-Word Display: 4127, 4137AD, 6127, 6128, 6137
• Alpha Display: 5137AD, 6138, 6139
• Up to 4 keypads, independent of auxiliary power considerations (you may
If you are going to use a 4285 Phone module, you MUST use addressable
keypads (4137AD, 5137AD, 6128, 6137, 6138, 6139) in the system, but set to
the non-addressable mode (address 31).

Wiring To The Keypads

1. Determine wire gauge by referring to the wiring length/gauge chart below.
Maximum wire lengths for any device that is homerun to the control can also
be determined from the chart, based on the current draw of that device alone.
Wiring Run Chart For Devices* Drawing Aux Power From The Control (12V+ & 12V–)
Wire Size
#22
#20
#18
#16
*
The length of all wire runs must not exceed 1500 feet (457m) when
unshielded quad conductor cable is used (750 feet if shielded cable is used).
This restriction is due to the capacitive effect on the data lines when quad
cable is used.
2. Run field wiring from the control to the keypads (using standard 4-
3. Connect remote Keypads to terminals 4, 5, 6, and 7 on the control board,
need to use an auxiliary power supply if the 500mA aux. output is
exceeded)
For devices (Keypads, RF Receivers, etc.) connected to a single 4-wire
run, determine the current drawn by all units connected to the single wire
run, then refer to the Wiring Run chart to determine the maximum wire
length that can be safely used for each wire size. Current draw for all
devices can be found in the SPECIFICATIONS AND ACCESSORIES
section.
Note: Refer to "Auxiliary Device Current Draw Worksheet" in the FINAL
POWER UP section for current draw for all keypads.
TOTAL CURRENT DRAWN BY ALL DEVICES CONNECTED TO A SINGLE WIRE RUN
50mA or less
500 ft (152m)
750 ft (228.6m)
1300 ft (396m)
1500 ft (457m) 1000 ft (305m)
Includes Keypads, RF Receivers, Relay Units, or 4285 Phone module.
conductor twisted wire cable using the wire gauge determined in step 1).
as shown in Figure 5.
– 15 –
100mA 300mA
250 ft (76m) 80 ft (24m)
380 ft (116m) 130 ft (39.6m)
650 ft (198m) 220 ft (67m)
330 ft (100.5m)
500mA
50 ft (15m)
80 ft (24m)
130 ft (39.6m)
200 ft (70m)