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Installation Note: IN0055 - Rev 03




Section 4

Introduction

This instruction will show how to install the Wireless RS485 link Kit (Order code 005326).

This details the additional steps needed to install a Wireless RS485 link into a SP PRO SelectSun Managed AC Coupled system.


Important information

  • This document needs to be read in conjunction with:
    • SP PRO AU Instruction Manual
    • Relevant SelectSun Installation Manual
  • SD1100 RS485 Wireless adaptors are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected SelectSun inverters. This is normally the AC load side of the SP PRO.
  • To extend the range of the wireless devices, please order the Patch Antenna (Order code 004810).


Additional information
For more installation information go to: Knowledge Base - Manuals


Legend to diagrams in this document

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Overview
The diagrams below illustrate the options for three phase managed AC coupled system with SelectSun inverters.

NOTE: When using multiple Wireless RS485 device pairs use Patch Antennas on each of the devices at the local end of the system (SP PRO end). This will reduce the interference between devices. Keep patch antennas separated by a minimum of 300mm.

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Figure 1: Three phase system with one wireless SelectSun


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Figure 2: Three phase system with one wireless SelectSun using Patch Antenna


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Figure 3: Three phase system with multiple wireless SelectSun’s


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Figure 4: Three phase system with multiple wireless SelectSun’s using Patch Antenna


Wireless Link Restrictions
The wireless link uses the same frequency band as Wi-Fi and Bluetooth (2.4GHz). Any obstructions between the two devices or interference from other devices using the same frequency band (other blue tooth or Wi-Fi devices) will have a significant impact on their range.

To achieve the maximum range of 200m there must be line of sight between the two devices and no interference. As a rule of thumb each obstruction that is equivalent to a stud wall will reduce the distance by about 20%. Mud brick walls, double brick or concrete walls will have a much larger impact on the range.

Any obstruction from the landscape such as levy banks, hills or undulation land will totally block the signal and the wireless link will not work.

If more than one wireless link is required within the same installation (such as a three phase system or multiple remote sites) then the interference between the devices will further reduce the distance. In this case it is recommended that a patch antenna be used on all local Wireless devices.

Extending the Wireless Range

If the required distance is longer than the specified 200m clear line of site, or there is multiple devices being used then the range of the devices can be extended by replacing the dipole antenna with a “patch” antenna. The table 1 below gives an indication of the expected range when using a combination of dipole and patch antennas:

Table 1: Maximum “Line of site” distance between Wireless RS485 device pairs.
Local Wireless device antenna
Remote wireless device antenna
Max distance, one pair of devices (line of sight)
Max. distance, multiple pair of devices (line of sight)
Dipole (supplied)
Dipole (supplied)
200m
Not recommended.
Patch  Optional (stock code 004810)
Dipole (supplied)
300m
150m
Patch  Optional (stock code 004810)
Patch  Optional (stock code 004810)
500m
250m

Optional Patch Antenna to extend the range of the wireless devices (Selectronic Order Code 004810)

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NOTE: Patch Antenna is directional and must be mounted in a fixed position that is directly facing the antenna of the other wireless device.



Wireless RS485 Installation

Wireless connection to SP PRO
Connect one end of supplied ‘CAT5’ network cable to the SP PRO Serial Communication PCA RS485 Port 2.


Connect the other end of the ‘CAT5’ network cable to the MASTER SD1100 RS485 Wireless adaptor.

NOTE: SD1100 RS485 Wireless adaptors are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected SelectSun inverters.

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SP PRO Connections (inside unit)  RS485 Port 2 RJ45 connector to AC Coupled Interface PCA and to MASTER SD1100 RS485 Wireless adaptor

Wireless Connection to SelectSun

Using the supplied CAT5 network cable connect one end to the SLAVE SD1100 RS485 Wireless adaptor and the other end to SelectSun RS485 IN.

NOTE: SD1100 RS485 Wireless adaptors are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected SelectSun inverters. This is normally the AC load side of the SP PRO.

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The last SelectSun inverter of the daisy chain must be terminated. Connect the supplied RJ45 termination connector to SelectSun RS485 OUT.

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Power For The Wireless RS485 Devices

The RS485 devices are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected SelectSun inverters. This is normally the AC load side of the SP PRO.

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