DS7400Xi-AT (Ver. 3+) Reference Guide Copyright © 1995-2000 Detection Systems, Inc. Page 5
1.15
Max. Load Currents
1.16
Backup Battery Calculation
• The following table is used to calculate the standby battery capacity required by NFPA when using the DS7400Xi:
1.17
Standby Current Load
• Battery AH - (20% S 0.375 AH’s Alarm)
• The following table is the derated battery divided by hours minus the control standby (175 mA):
Device
Quantity
Standby Current
Per Device
Total Standby Current
(Quantity x Standby
Current Per Device)
Alarm Current
Per Device
Total Alarm Current
(Quantity x Alarm
Current Per Device)
10 mA + 40 mA*
10 mA + 40 mA*
7 mA
1 mA
1 mA
350 µA
50 mA
1 mA
1 mA
350 µA
20 mA
20 mA
75 mA
100 mA
75 mA
100 mA
DS7460 - Dual Zone
DS7465 - Input/Output
DS7480 - Bell Supervision
DS7481 - Single Line Monitor
MX540 (DS7473) PIR Detector
MX835 TriTech Microwave/PIR Detector
MX775 (DS7470)PIR Detector
DS7457 - Single Zone Multiplex Input
MX794 (DS7474) PIR Detector
DS7445 Keypad
DS7447 Keypad
MX950 (DS7476)TriTech Microwave/PIR
2-Wire Smoke Detectors
Bells, Horns, etc.
Other sensors
Other
MX934 (DS7471) PIR Detector
MX938 (DS7472) Ceiling Mount PIR
DS7488 - Octal Relay*
DS7489 - Solid State Output Module
MX280 Series Multiplex Smoke Detectors
4-Wire Smoke Detectors
10 mA
750 mA max**
500 µA
560 µA
800 µA
800 µA
6 mA
35 mA
200 µA
200 µA
800 µA
800 µA
200 µA
200 µA
200 µA
200 µA
6 mA
35 mA
* = When calculating Standby and Alarm Current for the Octal-Relay Module, use 10 mA plus 40 mA for each activated relay.
Grand Total
Grand Total
** = Maximum current draw if using DS7400Xi panel power supply. Total of all outputs cannot exceed 750 mA.
65 mA
10 mA
50 mA
127 mA
20 mA
65 mA
10 mA
65 mA
127 mA
140mA
DS7433 - 8 Input Direct
ARDIS Communications Module
DS7430 - Multiplex Expansion
DS7432 - 8 Input Remote
DS7420i - Dual Line/Bell Supervision
DS7436 - Dual Multiplex Module
130 mA
130 mA
DS7450, DS7452, DS7455 Contact Points
350 µA
350 µA
Summary of Contents for DS7400Xi-AT
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