Rs-485 Multi-Drop Commands; Introduction; Figure 8. Configuring A Multi-Drop System Of Supplies - TDK-Lambda GENESYS Series User Manual

12.

RS-485 MULTI-DROP COMMANDS

12.1. Introduction

The Genesys™ power supply LAN option allows you to control up to 29 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 the J3-OUT to
J3-IN sockets. The multi-drop feature adds the ability to operate all the linked power
supplies with one global command.
Ethernet
Hub
CAT-5
Cables
Network
Server
8303460000 Rev A
When using multiple LAN controllers with Multi-drop.
Only one power supply may be "selected" at a time because
one controller may change the selected address and
the other may not be aware that a new address is active.
The RS-485 power supplies must be Multi-drop enabled.
See section 12.3.1 below
LAN
J3-OUT
LAN Option
RS-485 Addresses
must be different
IP Addresses
must be different
LAN
J3-OUT
LAN Option

Figure 8. Configuring a Multi-drop System of Supplies

CAUTION
NOTE
RS-485
RS-485
Link Cable
Link Cable
J3-IN J3-OUT
MD Option
RS-485 Addresses
may be the same
J3-IN J3-OUT
MD Option Up to 30 supplies
in one chain
56
Optional RS-485
terminators
J3-IN
Up to 30 supplies MD Option
in one chain
J3-IN
MD Option
IA672-04-01-Rev. I
J3-OUT
J3-OUT