Calculating Current Draw And Standby Battery; 1: Worksheet Requirements; Maximum Battery Standby Load; 2: Current Draw Worksheet For Idp Slc Devices - Honeywell Farenhyt RPS-1000 Installation And Operation Manual

Calculating Current Draw and Standby Battery

Function
Used for Class A
Installations
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.
* 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).
*Use a separate worksheet for each RPS-1000
NOTE: 33AH max battery size for Fm (Factory Mutual) installations
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.
For each device use this formula:
RPS-1000 Intelligent Power Module
(Current draw from battery)
Additional RPS-1000
(Daisy-chained to this module)
RPS-1000 / RPS-1000B Manual - P/N 151153:N 08/09/2017
Table 2.2 Earth Fault Resistance Values by Terminal
Terminal Label
Terminal
(Values in kohms)
Number
20 B
21 A
22 +
23 -
Table 2.3 Maximum Battery Standby Load
Rechargeable
Battery Size
7 AH
12 AH
17 AH
33 AH
Table 2.4 Current Draw Worksheet for IDP SLC Devices
Device # of Devices
This column
1*
(7 max.)
Low Biased
High
Trip
SBUS IN -
-
0
-
Max. Load for 24 hrs. Standby,
5 mins. Alarm
270 mA
475 mA
685 mA
1370 mA
Current per Device
X This column
Standby
Alarm:
Standby
Alarm:
Before You Begin Installing
High Biased
High Low
Restore Trip
- 0
- 0
0 -
- 0
*Max. Load for 60 hrs. Standby,
5 mins. Alarm
105 mA
190 mA
270 mA
540 mA
Standby
Current
= Current per number of devices.
40 mA 40 mA
mA
160
10 mA
mA
10
Low
Restore
0
0
-
0
Alarm
Current
160 mA
mA
mA
8