Max. Load Currents; Backup Battery Calculation; Standby Current Load - Bosch DS7400Xi Reference Manual

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:
Device
DS7400Xi (4+) Control Panel
DS7416i Advanced Radio Communications Module
DS7412 - RS232 Serial Interface Module
DS7420i -Dual Phone Line/Bell Supervision Module
DS7430 – Multiplex Expansion Module
DS7432 – 8-Input Remote Module
DS7433 – 8-Input Direct Module
DS7436 – Dual Multiplex Expansion Module
DS7445/DS7445i Keypad
DS7447/ DS7447E Keypad
DS7448 Keypad
DS7450, DS7452, DS7455 Contact Points
DS7457 – Single Zone Multiplex Input Module
DS7460 – Dual Zone Module
DS7465 – Input/Output Module
DS7480 – Bell Supervision Module
DS7481 – Single Phone Line Monitor
DS7488 – Octal Relay Module**
DS7489 – Solid State Output Module
MX280 Series Multiplex Smoke Detectors
MX540 (DS7473) PIR Detector
®
MX835 TriTech PIR/Microwave Detector
MX775 (DS7470) PIR Detector
MX794 (DS7474) PIR Detector
MX934 (DS7471) PIR Detector
MX938 (DS7472) PIR Detector
®
MX950 (DS7476) TriTech PIR/Microwave Detector
RF3222 Wireless Receivers
2-Wire Smoke Detectors
4-Wire Smoke Detectors
Bells, Horns, etc.
Other Sensors
Other
* = Add 15 mA for each additional zone in alarm.
** = When calculating Standby and Alarm Current for the Octal Relay Module, use 10 mA plus 40 mA for each activated relay.
*** = Maximum current draw if using the DS7400Xi Panel power supply. Total of all outputs cannot exceed 750 mA.
1.17

Standby Current Load

• Battery Ah - (20% Storage + 0.375 Ah Alarm)
• The following table is the derated battery divided by hours minus the control standby (175 mA):
Rechargeable Max. Standby
Battery Size for 4 hours
7 Ah 1.0 A
8 Ah 1.2 A
14 Ah 1.5 A
15 Ah 1.5 A
17.2 Ah 1.5 A
21 Ah 1.5 A
28 Ah 1.5 A
30 Ah 1.5 A
35 Ah 1.5 A
DS7400Xi ( 4+) Reference Guide
Quantity Standby Current
per Device
1
35 mA max.
10 mA + 40 mA**
Max. Standby Max. Standby
for 8 hours for 24 hours
470 mA X
580 mA X
1.1 A 270 mA
1.2 A 300 mA
1.5 A 380 mA
1.5 A 500 mA
1.5 A 740 mA
1.5 A 800 mA
1.5 A 970 mA
Copyright © 2007 Bosch Security Systems, Inc.
Max. Load Currents
UL Installations
Maximum Current By Output:
Not to exceed the maximum load currents listed above in Standby or Alarm
Aux. Power & Keypad (Combined)
Option Power
Bell Output
Programmable Output 2
Loop Power +
Total Standby
Current
(Quantity x Standby
Current per Device)
175 mA 175 mA
127 mA
20 mA
65 mA
10 mA
65 mA
130 mA
75 mA
100 mA
80 mA
350 A
350 A
1 mA
1 mA
7 mA
20 mA
10 mA
500 A
800 A
6 mA
200 A
800 A
200 A
200 A
6 mA
30 mA
Grand Total
Max. Standby Max. Standby
for 48 hours for 60 hours
X
X
X
X
100 mA
160 mA 100 mA
280 mA 190 mA
310 mA 210 mA
400 mA 280 mA
Standby
1.5 A
1.0 A
1.0 A
X
500 mA
500 mA
Alarm Current
per Device
250 mA
127 mA
35 mA max.
140 mA
65 mA
10 mA
80 mA*
130 mA
75 mA
100 mA
100 mA
350 A
350 A
1 mA
1 mA
50 mA
20 mA
10 mA + 40 mA**
750 mA max.***
560 A
800 A
35 mA
200 A
800 A
200 A
200 A
35 mA
30 mA
Grand Total
Max. Standby
for 72 hours
X X
X X
X X
X X
X X
X
130 mA
150 mA
200 mA
P/N: F01U035325-01
Alarm
2.5 A
1.0 A
1.0 A
1.75 A
500 mA
500 mA
Total Alarm
Current
(Quantity x Alarm
Current per Device)
250 mA
Max. Standby
for 80 hours
X
X
X
X
X
X
100 mA
120 mA
170 mA
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