ISC304-0-0-AC-04
November 2010
Page 5
General
Remember the following when installing the Nexus Lite Controller:
Communications Distance
RS485 Terminal Port
The RS485 communications distance between the Nexus Lite Controller and the LAST
Amano Terminal in a cable run, MUST NOT exceed 1 km (1 090 yd). Achieve this by
using good quality screened, twisted 2-pair cable, with the screen EARTHED at one
end.
Jumper Links
Long
transmission lines or multiple “star” connections, may cause communication
problems. Placing a Jumper Link across the jumper (See Figure 3 for position) in the
LAST UNIT AT THE END OF THE CABLE RUN should solve the problem.
Distance between the Controller and its Wiegand or Multi-Discipline
Readers
CAUTION:
When implementing the 150 m (164 yd) cable distances with Amano
Wiegand Readers use the 12 V power output option. Note, however,
that the Multi-discipline Readers only connect using the 12 V power
output option.
For maximum, data communications distance, install the Readers no further than
150 m (164 yd) from the Controller. The cable individual conductor cross-sectional
area should not be less than 0.2 mm
2
(0.0003 in
2
).
Distance between Amano Units
You can mount
Nexus Lite Controllers (ISC920)
directly next to each other. To avoid
mutual interference, install the
Touch Screen Nexus Lite Controllers (ISC921)
at
least 500 mm (20 in) apart.
To avoid mutual interference, install the
Wiegand Readers
or
Multi-discipline
Readers
at least 500 mm (20 in) apart.
EARTH Connection
Connect the Nexus Lite Controller to a good EARTH point. Using the RS485 Port,
connect the ETH Lead to the
„ETH‟ Terminal. Mains EARTH can be used, but electrical
noise may exist.
CAUTION:
When using the Nexus Lite Controller with FCC approved
accessories, ensure that the RS485 cable is routed through a
separate grommet to the power cable. Also ensure that you use a
CE approved Power Supply Unit.
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Summary of Contents for Nexus Lite ISC920-0-0-AC Series
Page 14: ...ISC304 0 0 AC 04 November 2010 Page 14 Figure 7 Motor Lock Connection Details ...
Page 15: ...ISC304 0 0 AC 04 November 2010 Page 15 Figure 8 Solenoid Lock Connection Details ...
Page 18: ...ISC304 0 0 AC 04 November 2010 Page 18 Fixed Address Label Unique Location Description ...
Page 19: ...ISC304 0 0 AC 04 November 2010 Page 19 Fixed Address Label Unique Location Description ...
Page 20: ...ISC304 0 0 AC 04 November 2010 Page 20 Fixed Address Label Unique Location Description ...
Page 22: ...ISC304 0 0 AC 04 November 2010 Page 22 USER NOTES ...
Page 23: ...ISC304 0 0 AC 04 November 2010 Page 23 USER NOTES ...
Page 51: ...ISC305 0 0 AC 02 October 2010 Page 27 User Notes ...