RPS-1000 / RPS-1000B Manual - P/N 151153:N 08/09/2017
8
Calculating Current Draw and Standby Battery
Before You Begin Installing
2.6 Calculating Current Draw and Standby Battery
This section is for helping you determine the current draw and standby battery needs for your installation.
2.6.1 Worksheet Requirements
The following steps must be taken when determining RPS-1000 current draw and standby battery requirements.
Filling in the Current Draw Worksheet, Table 2.4,Table 2.5 or Table 2.6
1.
For the RPS-1000, the worst case current draw is listed for the panel, addressable devices, and SLC expanders. Fill in the number of
addressable devices and expanders that will be used in the system and compute the current draw requirements for alarm and
standby.
2.
Add up the current draw for all auxiliary devices and record in the table at Line B.
3.
Add up all notification appliance loads and record in the table at Line C.
4.
For notification appliances and auxiliary devices not mentioned in the manual, refer to the device manual for the current ratings.
5.
Make sure that the total alarm current you calculated, including current for the panel itself, does not exceed 6.0 A. This is the
maximum alarm current allowable.
6.
Complete the remaining instructions in the table for determining battery size requirements.
Maximum Battery Standby Load
Table 2.3 shows the maximum battery standby load for the RPS-1000 based on 24 and 60 hours of standby. The standby load calcula-
tions of line G in the Current Draw Calculation Worksheet must be less than the number shown in Table 2.3 for the battery size used and
standby hours required.
*
Use a separate worksheet for each RPS-1000
2.6.2 Current Draw Worksheet for IDP SLC Devices
For each RPS-1000* in the installation, use this worksheet to determine current requirements during alarm/battery standby operation.
See individual FACP manual for maximum number of devices.
Used for Class A
Installations
20
B
SBUS IN
-
-
0
0
21
A
-
-
0
0
22
+
0
0
-
-
23
-
-
-
0
0
Table 2.2 Earth Fault Resistance Values by Terminal
Function
Terminal
Number
Terminal Label
Low Biased
High Biased
(Values in kohms)
High
Trip
High
Restore
Low
Trip
Low
Restore
Table 2.3 Maximum Battery Standby Load
Rechargeable
Battery Size
Max. Load for 24 hrs. Standby,
5 mins. Alarm
*Max. Load for 60 hrs. Standby,
5 mins. Alarm
7 AH
270 mA
105 mA
12 AH
475 mA
190 mA
17 AH
685 mA
270 mA
33 AH
1370 mA
540 mA
* Required for NFPA 72 Auxiliary Protected Fire Alarm systems for Fire Alarm Service (City Box) and
Remote Station Protected Fire Alarm systems (Polarity Reversal) and Digital Alarm
Communicator/Transmitter (DACT).
NOTE:
33AH max battery size for Fm (Factory Mutual) installations
Table 2.4 Current Draw Worksheet for IDP SLC Devices
Device
# of Devices
Current per Device
Standby
Current
Alarm
Current
For each device use this formula: This column X This column = Current per number of devices.
RPS-1000 Intelligent Power Module
(Current draw from battery)
1*
Standby 40 mA
40 mA
Alarm: 160
mA
160 mA
Additional RPS-1000
(Daisy-chained to this module)
(7 max.)
Standby 10 mA
mA
Alarm: 10
mA
mA
Summary of Contents for Farenhyt RPS-1000
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