Rs-485 Multi-Drop Commands; Introduction; Configure The Lan Supply; To Set Up The Master Power Supply - TDK-Lambda Z+ series User Manual

11.1 Introduction

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The Z power supply LAN option allows you to control up to 30 other supplies which do not have
the LAN option installed. All are controlled through one IP address from the supply with the LAN
option.
This is called the Multi-drop configuration. The Ethernet cable goes to the LAN supply. All the
other supplies are connected using a RS-485 Serial Link Cable between J4-OUT to J4-IN sockets.
The multi-drop feature adds the ability to operate all the linked power supplies with one global
command.
When using multiple LAN controllers with Multi-drop, only one power supply may be
"selected" at a time. One controller may change the selected address however the others
may not be aware that a new address is active.

11.2 Configure the LAN Supply

The LAN power supply, at the head of the multi-drop chain, is called the Master supply.

11.2.1 To Set Up the Master Power Supply:

A. Connect the LAN to a computer as described in section 4
B. Enable the LAN option as described in Section 3.1.3
C. Connect a RS-485 Link cable from the rear J4-OUT jack to the next supply's J4-IN
D. Switch AC power on the supply
E. Set the supply's RS-485 address as described below

11.2.2 To Set the RS-485 Address:

In addition to the supply's IP address, the multi-drop requires setting an RS-485 address. It is
viewed on the front panel of the power supply by setting it to local mode
1. Press REM button on the front panel.
2. "Adr "will be seen on the current display. Press the current encoder.
3. Move the current encoder to select the address and then press current encoder again.
The default RS-485 address is 6. It may be set to any value from 1 to 31. The RS-485 address
is not related to the IP address. However, it is required that no other power supply on the multi-
drop chain will have the same RS-485 address.

11 RS-485 MULTI-DROP COMMANDS

CAUTION:
Fig.10-1: Configuring a Multi-drop System of Supplies
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