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Section E: 2300-A8II Wiring & Installation.
The 2300-A8II is to be Installed and Serviced by Service Personnel Only. No Operator / User
Serviceable Parts.
All power and signals must be de-energised before connecting any wiring, or altering any Jumpers or Dip Switch-
es. Do not start the MicroScan before programming in a unique station number. Refer 'Station Number
Programming and Serial Number'.
Mounting.
* Also refer to Connection Diagrams and Notes.
(1)
Mount in a clean environment in an electrical cabinet on 35mm Symmetrical mounting rail.
(2)
Draft holes must have minimum free air space of 20mm. Foreign matter must not enter or block draft
holes.
(3)
Do not subject to vibration or excess temperature or humidity variations.
(4)
Do not mount in cabinets with power control equipment.
(5)
To maintain compliance with the EMC Directives the 2300-A8II is to be mounted in a fully enclosed steel
fire cabinet. The cabinet must be properly earthed, with appropriate input / output entry points and cabling.
Power Supply Wiring.
* Also refer to Connection Diagrams and Notes - 'Power and RS485 Comms Wiring' on page 14.22-6.
RS485 Comms Signal Cabling.
(1)
Use only low capacitance, twisted pair, overall screened data cable. The cable must equal or better the
following specifications.
Conductor Resistance @ 20C.
Capacitance between wires of a pair.
Capacitance between each wire to all others bunched together.
NOTE:
All cables are to be subject during manufacture to in-process spark testing @ 4kVrms.
All cables are to be tested between conductors and conductors to screen for 1min @ 1500Vrms.
(2)
Minimum cable pairs:
(3)
Take care not to stress or damage cables during installation.
(4)
Total length of trunk line, including spurs, is not to exceed 1200m without isolating boosters.
(5)
Terminating resistors -1k.
(6)
Cabling paths should avoid sources of radio frequency interferences such as fluorescent lights, variable
speed motor drives, welding equipment, radio transmitters, etc.
(7)
There should be a minimum of 200mm physical separation between power cables and data cables.
(8)
Data cables should not be exposed to excessive heat or moisture, and should not be buried directly in the
ground without protection.
(9)
Avoid powering a remote station or controller from the same power supply as a variable speed drive.
(10)
All unused twisted pairs should be terminated at both ends with 1k resistors. DO NOT ground unused
pairs.
Commissioning.
(1)
Check that all the above conditions have been met, and the wiring
checked, before applying power to the 2300-A8II.
Conductor Size.
Max. Working Voltage.
Cross-talk between pairs:
Characteristic Impedance .
Attenuation of a pair:
RS485 = 1. (Plus overall screen.)
Cable Specifications.
@ 1kHz
@ 100kHz
@ 100kHz
@ 1kHz
@ 10kHz
@ 100kHz
@ 50kHz
@ 1MHz
@ 1.5MHz
14.22-8
7/0.20mm, 24AWG
8.9/100m
300Vrms
50F/m
95F/m
>-90dB/100m
>-50dB/100m
135
0.15dB/100m
0.42dB/100m
0.8dB/100m
0.9dB/100m
1.9dB/100m
2.4dB/100m
www.intech.co.nz
Christchurch Ph: +64 3 343 0646
Auckland Ph: 09 827 1930
Email:
sales@intech.co.nz
2300-A8II 080411
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