TWINFLEX
®
SRP Remote Status Indicator Engineering and Commissioning Manual
13
Power Supply & Connections
24V DC Power is provided to the RSI from the Control Panel via the AUX PWR 1 or AUX PWR 2
connectors on the SRP Control Panel connector board. The preferred cable to carry the 24V from the
Control Panel to the RSI is 2-core 1.5mm
2
screened fire resistant cable (i.e. MICC, FP200, Firetuff,
Firecell, Lifeline or equivalent).
The maximum total
cable length from the SRP Control Panel to an RSI is 500 metres
.
Up to 8 RSIs can be connected but they must all be within the maximum 500 metres cable length and
must be wired +24V to +24V, 0V to 0V, Screen to Screen and so on.
Power Connection Table
SRP Control Panel
First RSI
Second RSI
AUX PWR +
+24V
+24V
AUX PWR -
0V
0V
SCRN
Screen
Screen
When powering an RSI from the panel, the extra current will reduce the battery backup run time and
has to be allowed for in the battery calculations.
NOTE
: A jumper wire MUST be installed between the Screen of the Power and the Screen of the
Peripheral Bus if power is provided by the SRP Control Panel.
Current Drawn by Single Remote Status Indicator @ 24.0V DC
Quiescent (default screen, back light off) 15.0mA
Controls enabled (back light on)
35.0mA
Separate Power Supply Requirements
The RSI can be powered by a separate 24V power supply if required. The RSI working voltage range is
between 21V DC to 32V DC with a maximum current of 50.0mA.
NOTE
: If an RSI is powered from something other than the SRP Control Panel, the screen of the cable
MUST be connected to the Screen of the back board but no jumper from Power Screen MUST be
connected to the Screen of the Peripheral Bus.
Remote Status Indicator Back Board Power Supply Connections
