Hochiki YBO-R/SCIM - Manual

2-3-0-367/ISS6/OCT13
HOCHIKI YBO-R/SCI & YBO-R/SCIM SHORT CIRCUIT
ISOLATOR BASES & CHQ-SCI/DIN SHORT CIRCUIT
ISOLATOR MODULE
INSTALLATION INSTRUCTIONS
General Description
These devices detect and isolate short-circuits on the loop. When a short-circuit is detected during power up these
isolators will illuminate their integral LED (yellow) and drop the power to the rest of the loop.
YBO-R/SCI & YBO-R/SCIM Isolator Base
The YBO-R/SCI (and the marine-approved equivalent YBO-R/SCIM) is a short-circuit isolator combined in a base
compatible with the ESP range of sensors (see compatibility chart below). The Isolator can also be used as a stand
alone unit with the addition of a simple clip on cover (SI/CAP), in either configuration the unit does not require a loop
address. A remote fire LED facility is provided when a sensor is attached to the base.
Note:- If a sensor is fitted this will still be powered when the device is isolating (yellow LED illuminated).
Specifications
Base Isolator
Ordering codes YBO-R/SCI * 1
YBO-R/SCIM (Marine-Approved)
Protocols ESP/HRE #
Operating Voltage 19-41 Vdc (24 Vdc nominal)
Standby current 60 µA
Current drawn by isolator during fault condition < 10 mA
Maximum current consumption from remote LED N/A
Maximum continuous current 1 A
Maximum quantity per loop 127* 2
LED colour Yellow
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 92g
Optional cover for stand alone use SI/CAP
NOTE: See AP0127 for short-circuit isolator specifications
# The YBO-R/SCI can be used on the HRE protocol as a replacement for the SCI/2a, but as a stand alone isolator only, in other words, with
no sensor fitted.
* 1 Fire alarm control panel compatibility is required for this product.
* 2 Check with Fire alarm control panel manufacturer for maximum loop quantities
Compatibility
The YBO-R/SCI base isolator 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 sensor ALG-E, ALG-EN, ALK-E (and all variants)
Ionisation sensor AIE-E (and all variants)
Temperature sensor ATG-E, ACB-E, ACB-EW (and all variants)
Multi-Sensor ACA-E