Wiring Specifications; 1: Length Limitations; 2: Calculating Wiring Distance For Sbus Modules - Honeywell Farenhyt RPS-1000HV Manual

Wiring Specifications

B Auxiliary Devices Current
Notification Devices
5495/5499 Power Supply
C Notification Appliances Current
D Total current ratings of all devices in system (line A + line B + C)
E Total current ratings converted to amperes (line D x 0.001):
F Number of standby hours
G Multiply lines E and F.
H Alarm sounding period in hours. (For example, 5 minutes = 0.0833 hours)
I Multiply lines E and H.
J Add lines G and I.
1 The FACP can only support 2 devices with LEDs on. The current draw has been added to the panels alarm current.
2 If using 24 VDC aux power only. No standby or alarm current is needed for battery calculation if using 24 VAC, 120 VAC, or 240 VAC.
3 Maximum SBUS address capacity is determined by the amount of SBUS bandwidth consumed by each SBUS module. Refer to the
FACP manual for SBUS limitations.
4 If there are door holders in the system, there is no need to consider door holder current for alarm/battery standby, because power is
removed during that time. However, during normal operation, door holders draw current and must be included in the 1.8 A total current
that can be drawn from the panel.
5 Use next size battery with capacity greater than required.
2.6 Wiring Specifications
2.6.1 Length Limitations
This section contains information on calculating SBUS wire distances and the types of wiring configurations (Class A and B).
2.6.2 Calculating Wiring Distance for SBUS Modules
The following instructions will guide you in determining the type of wire and the maximum wiring distance that can be used with SBUS
accessory modules.
To calculate the wire gauge that must be used to connect SBUS modules to the panel, it is necessary to calculate the total worst case current
draw for all modules on a single 4-conductor bus. The total worst case current draw is calculated by adding the individual worst case currents
for each module. The individual worst case values are shown in the table below.
NOTE: Total worst case current draw on a single SBUS cannot exceed 1 amp. If a large number of accessory modules are required and the
worst case current draw will exceed the 1 amp limit, then the current draw must be distributed using RPS-1000 Power Expanders. Each RPS-
1000 Power Expander provides an additional SBUS, with an additional 1 amp of SBUS current. Wiring distance calculations are done separately
for each RPS-1000, and separately for the panel itself.
RA-2000, RA-1000, RA-100 Fire Annunciators
6815 SLC Loop Expander
5815XL SLC Loop Expander
5824 Serial/Parallel Printer Interface Module
5880 LED I/O Module
5865 LED Annunciator
RPS-1000 Intelligent Power Supply
5496 NAC Expander
ECS-50W
ECS-125W
ECS-DUAL50W
ECS-DUAL50W with ECS-50WBU
RPS-1000 Manual — P/N 151153:R 2/15/2022
Device # of Devices
4
Refer to device manual for current rating
Table 2.6 Current Draw Worksheet for SD SLC Devices
Model Number
Current per Device
Alarm/Standby:
Standby:
Alarm:
Alarm:
Alarm:
Alarm:
Total standby AH
Total alarm AH
Total ampere hours required
Worst Case Current Draw
Before You Begin Installing
Standby
Current
mA mA
75 mA
205 mA
mA
mA
mA
mA
A
H
AH
5
AH
0.120 amps
0.078 amps
0.150 amps
0.040 amps
0.250 amps
0.200 amps
0.010 amps
0.010 amps
0.010 amps
0.010 amps
0.010 amps
0.010 amps
Alarm Current
mA
mA
mA
mA
mA
mA
mA
mA
A
H
AH
23