Wiring To Keypads - ADEMCO VISTA-20P Installation And Setup Manual

Wiring to Keypads

1. Connect keypads to the control's keypad terminals as
shown on the Summary of Connections diagram.
Determine wire gauge using the Wiring Run Chart
below.
2. Set keypad addresses. Refer to the address setting
instructions included with the keypads and set each
keypad device address according to the chart at right.
3. Program the keypad addresses, partition
assignments and sound options in data fields *190-
*196.
NOTE: Each keypad must be assigned a unique
address, starting at address 16. Keypads
programmed with the same address will give
unpredictable results.
Supplementary Power (optional)
1. Connect as shown. Be sure to connect the negative (–)
terminal on the power supply unit to terminal 4
(AUX –) on the control.
SUPPLEMENTARY
POWER SUPPLY
+
–
IMPORTANT:
MAKE THESE
CONNECTIONS
DIRECTLY TO
SCREW
TERMINALS AS
SHOWN.
Figure 4. Using a Supplementary Power Supply
Wiring Run Chart For Devices* Drawing Aux Power From The Control (12V+ & 12V–)
TOTAL CURRENT DRAWN BY ALL DEVICES CONNECTED TO A SINGLE WIRE RUN
Wire
Size 50 mA or less
#22 500 ft (152m)
#20 750 ft (228.6m)
#18 1300 ft (396m)
#16 1500 ft (457m)
* Includes Keypads, RF Receivers, Zone Expander/Relay Units, or 4285/4286 Phone Module.
Maximum wire lengths for any device that is homerun to the control can also be determined from the Wiring Run Chart,
based on the current draw of that device alone.
The length of all wire runs for both partitions combined 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.
CONTROL TERMINAL STRIP
AUX. AUX. DATA DATA
–
+
IN OUT
4 5 6 7
100 mA
250 ft (76m)
380 ft (116m)
650 ft (198m)
1000 ft (305m)
Mounting and Wiring the Control
Notes
• Typical Fixed-Word Display: 6150
• Typical Alpha Display: 6160
• The system supports up to 8 keypads, which can
be assigned to partitions in any combination
(see program fields *190-*196).
• For single 4-wire runs, determine the current
drawn by all units, then refer to the Wiring Run
chart to determine the maximum length that can
be safely used for each wire size.
• Use supplementary power if the control's aux.
power load for all devices exceeds 600mA.
Suggested power supply: AD12612
Keypad Addresses
Keypad Address
no. 1 16**
no. 2 17
no. 3 18
no. 4 19
** The first keypad is address 16, which is always
enabled and set for partition 1 with all sounds on.
U L
Use a UL Listed, battery-backed supply for
UL installations. The battery supplies power to
these keypads in case of AC power loss.
The battery-backed power supply should have
enough power to supply the keypads with the UL
required minimum standby power time.
Keypads powered from supplies that do not have a
backup battery will not function if AC power is lost.
Make sure to power at least one keypad in each
partition from the control's auxiliary power output.
300 mA 500 mA
80 ft (24m) 50 ft (15m)
130 ft (39.6m) 80 ft (24m)
220 ft (67m) 130 ft (39.6m)
330 ft (100.5m) 200 ft (70m)
Keypad Address
no. 5 20
no. 6 21
no. 7 22
no. 8 23
600 mA
42 ft (13m)
67 ft (20.4m)
115 ft (35m)
170 ft (52m)
2-3