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JA-110T Bus short circuit isolator module
The JA-110T is a component of the JABLOTRON JA-100
system. It is used to increase the safety of bus cables in a house. It
separates the outer bus branch from the inner branch. If the outer
branch is damaged (e.g. a burglar short-circuits the cable), the
inner branch of the system remains fully functioning.
It is recommended to use the isolator namely in cases when the
bus cable leads outside the guarded area. The isolator can also be
used to separate individual floors (or wings) in a house.
The isolator can also be used to extend cable length – it
improves signal transmission when long cables are used. The
module should be installed by a trained technician with a valid
certificate issued by an authorized distributor.
Installation
The module can be installed into a JA-190PL mounting box
(supplied by Jablotron), into a control panel housing or into a
standard mounting box. It should always be installed inside the
guarded area.
It is possible to install an unlimited number of isolators into
the system. However, they should only be used to split the cables
of the inner bus branch. It is forbidden to connect multiple
isolators in a row.
When connecting the module to the
system bus, always switch the power off.
Figure: 1 – outer bus branch terminals (O); 2 – indication of fault in the
outer bus branch; 3 – inner bus branch terminals (I from the cont rol
panel)
The isolator becomes functional when the cables are
connected and the system is switched on. It does not have to
be enrolled into the system (it does not occupy an address).
Function
The isolator disconnects the output (O) bus for 5 seconds if:
1. the electrical current drawn from the isolator increases above
250mA (+U and GND terminals in the OUTSIDE part)
2. the bus input voltage drops below 9V (+U and GND terminals
in the INSIDE part)
If there is a permanently over-high current drawn from the output
(O) or a low voltage, on the intput, the outer bus remains
permanently disconnected, or the voltage could cycle in 5 s
intervals. Disconnection of the output terminal is indicated with a
permanently lit yellow LED (2).
If it is necessary to connect a remote bus-powered detector and
utilize the module’s function for improving signal quality, sufficient
voltage on the bus input must be ensured (by using a sufficiently
thick cable) in order to prevent disconnection of the output (O) part
of the bus if the input voltage drops below 9V.
Figure: Example of installation into a JA-190PL mounting box
Technical specifications
Power from control panel digital bus 12 V (9…15 V)
Current consumption in standby mode 5 mA
Current consumption for cable selection 5 mA
Maximum allowed current in the outer bus branch max 250 mA
Classification Grade II
according to EN 50131-1, EN 50131-3,
Operational environment according to EN 50131-1
II.Indoor general
Operating temperature range -10°C to 40°C
Also complies with EN 50130-4, EN 55022
JABLOTRON ALARMS a.s. hereby declares that the JA-11 0 T Bus
short circuit isolator module is in compliance with the essential
requirements and other relevant provisions of Directive 1999/5/EC.
The original of the conformity assessment can be found at
www.jablotron.com - Technical Su pport section
Note: Although this product does not contain any harmful materials
we suggest you return the product to the dealer or directly to the
producer after use. For more detailed information visit
www.jablotron.com.
Fig: (I) inner (guarded) area; (O) outer (unguarded) area; (1) separation of the outer bus branch; (2) bus length extension over 500 m (see Function)
JA-110T Bus short circuit isolator module 1 / 1 MLJ51101
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