Hochiki YBN-R/3(WHT)-SCI User Manual
Hochiki Audio accessories

2-3-0-1499/ISS2/JAN13
HOCHIKI YBN-R/3(SCI) SHORT-CIRCUIT ISOLATOR
BASE INSTALLATION INSTRUCTIONS
General Description
The YBN-R/3(SCI) is a sensor mounting base featuring an integral short-circuit isolator which
will detect and isolate short-circuits on the loop. When a short-circuit is detected during power up the unit will drop
the power to the rest of the loop.
The YBN-R/3(SCI) is compatible with the ESP range of sensors (see compatibility chart below). The unit does not
require a loop address. A remote fire LED facility is provided when a sensor is attached to the base.
Note:- A fitted sensor will still be powered when this device is isolating.
Specifications
Ordering code
YBN-R/3(SCI)
Protocol ESP
Operating Voltage
17 - 41 V dc (24 V dc nominal)
Standby current
60 µA
Current drawn by isolator during fault condition
< 4 mA
Maximum current consumption from remote LED
10 mA (limited by attached sensor)
Maximum continuous current
1 A
Maximum quantity per loop
127*
1
Ambient temperature range
-10
C to +50 C
Relative humidity
10% to 95% RH (at 40
C)
Colour and case material
Ivory or White ABS
Fixing centres
48 mm through to 74 mm
Maximum wire thickness
2.5 mm²/terminal
Weight 79
g
*
1
Check with Fire alarm control panel manufacturer for
maximum loop quantities
See AP0127 for short-circuit isolator specifications
Compatibility
The YBN-R/3(SCI) isolator base has been designed to work with the sensors listed below. All sensors are
compatible with Hochiki ESP (Enhanced System Protocol).
Sensor Type
Ordering Code
Photoelectric (smoke) sensor
ALG-E, ALG-EN, ALK-E, ALN-E (and all variants)
Ionisation (smoke) sensor
AIE-E (and all variants)
Temperature (heat) sensor
ATG-E, ACB-E, ATJ-E (and all variants)
Multi (smoke and/or heat) sensor
ACA-E, ACC-E (and all variants)
Precautions
Ensure that this device is installed in accordance with local standards or regulations.
Only install in suitable environments, the following should be avoided : -
Excessive ambient temperature.
Where excessive condensation or moisture is present.
Hazardous areas.
Do not use a high voltage tester on these devices.
Ensure that the YBN-R/3(SCI) base isolator is securely fixed to the ceiling or other suitable surface.
Ensure that the terminals on the unit are securely fastened.
When fitting the YBN-R/3(SCI) isolator base, for proper wiring supervision, ensure that the cables are routed
through the base terminals and not spurred off a main wiring route.