Specifications
DS7400Xi Ver. 3+ Reference Guide Copyright © 1995-96 Detection Systems, Inc. Page 5
1.16 Backup Battery Calculation
• The following table is used to calculate the standby battery capacity required by NFPA when using the DS7400Xi:
Device Quantity
Standby Current
Per Device
Total Standby Current
(Quantity x Standby
Current Per Device)
65 mA
10 mA
50 mA
10 mA + 40 mA*
DS7433 - 8 Input Direct
DS7447 Keypad
DS7430 - Multiplex Expansion
DS7432 - 8 Input Remote
DS7488 - Octal Relay*
DS7445 Keypad
100 mA
75 mA
Alarm Current
Per Device
65 mA
10 mA
65 mA
10 mA + 40 mA*
100 mA
75 mA
Total Alarm Current
(Quantity x Alarm
Current Per Device)
20 mA
1 mA
1 mA
350 µA
* = When calculating Standby and Alarm Current for the Octal-Relay Module, use 10 mA plus 40 mA for each activated relay.
DS7450 & DS7452 - Contact Points
DS7416 - ARDIS Module
DS7460 - Dual Zone
DS7465 - Input/Output
DS7480 - Bell Supervision
DS7481 - Single Line Monitor
Smoke Detectors
Bells, Horns, etc.
Other sensors
DS7457 - Single Zone Multiplex Input
127 mA
350 µA
20 mA
1 mA
1 mA
350 µA
127 mA
350 µA
Grand Total Grand Total
DS7420i - Dual Line/Bell Supervision
20 mA 140 mA
Other
20 mA 20 mA
1.17 Standby Current Load
• Battery AH - (20% Storage + 0.375 AH’s Alarm)
• The following table is the derated battery divided by hours minus the control standby (175 mA):
15 AH
7 AH
8 AH
14 AH
17.2 AH
21 AH
28 AH
30 AH
35 AH
Rechargeable
Battery Size
Max. Standby
for 8 hours
Max. Standby
for 24 hours
Max. Standby
for 48 hours
Max. Standby
for 60 hours
Max. Standby
for 72 hours
Max. Standby
for 80 hours
Max. Standby
for 4 hours
1.0 A
1.2 A
1.5 A
1.5 A
1.5 A
1.5 A
1.5 A
1.5 A
1.5 A
X
X
X
X
X
X
100 mA
120 mA
170 mA
470 mA
580 mA
1.1 A
1.2 A
1.5 A
1.5 A
1.5 A
1.5 A
1.5 A
X
X
X
X
X
X
130 mA
150 mA
200 mA
X
X
X
X
X
100 mA
190 mA
210 mA
280 mA
X
X
X
X
100 mA
160 mA
280 mA
310 mA
400 mA
X
X
270 mA
300 mA
380 mA
500 mA
740 mA
800 mA
970 mA
1.18 Options
• DS7412: RS232 Serial Interface module. The DS7412 module
allows the panel to send event information, in an
ASCII format, directly to a serial printer or computer.
In addition, the interface allows the direct connection
of a computer to the panel for programming via the
WDSRP programming software.
• Current Draw= 25 mA, 35 mA with LEDs on.
• DS7420i: Dual Phone Line/Bell Supervision Module (1 per
system).
The DS7420i allows the control to be used in
NFPA 72 installations. It provides two supervised
12.0 VDC signaling outputs, one Class A (Style D)
input zone, and dual phone line transmission and
supervision.
• Current Draw = 20 mA, Standby. 140 mA, Alarm.
• DS7430: Multiplex Expansion Module (1 per system).
The DS7430 provides a two-wire multiplex bus for
the connection of additional remote zones. It also
supplies up to 250 mA for 4-wire multiplex devices
such as the DS7432.
• Current Draw = 65 mA, Standby. 65 mA, Alarm.
• DS7432: 8 Input Remote Module (up to 15 per system. Re-
quires a DS7430 Multiplex Expansion Module).
The DS7432 provides a means of monitoring
conventional Normally Open or Normally Closed
contacts. It reports their status to the control panel
as multiplex addresses. It occupies eight multiplex
zones on the system and can monitor up to eight
separate loops. It will support 4-wire smoke detec-
tors.
• Current Draw = 10 mA, Standby. 10 mA, Alarm.