Chapter 2: Connection; Point To Point; Multi Drop; Selecting One Power Supply In A Multi Drop Chain - TDK-Lambda Z+ Series User Manual

This section provides information on variable IEEE (GPIB) connection modes, communication
cables and selecting communication parameters for operation via IEEE (GPIB) interface.
It is possible connect to IEEE (GPIB) interface in two ways.

2.1 Point to Point

One IEEE Interface can control only one Z
be configured for IEEE communication interface. Each unit must have a unique address, ranging
from 01 to 31. Baud rate and address are automatically fixed to "57600" and "SCPI".

2.2 Multi Drop

One IEEE Interface can control more than one Z
connected via RS485 interface to a Power Supply with the installed IEEE option. Refer to Fig.2-2.The
Power Supply connected to a PC via the GPIB cable must be configured for an IEEE communication
interface, the other must be configured for a RS485 interface. Each unit must have a unique address,
ranging from 01 to 31. IEEE module gets the address of the unit into which it is installed. For RS485
interface set Baud rate at "57600" bps and Communication Language to "SCPI".

2.2.1 Selecting One Power Supply in a Multi Drop Chain

All the SCPI commands may be sent to any one of the Power Supplies in an RS-485 chain by first
sending the INST:nSEL address command. All commands and queries will then apply only to
the selected Power Supply, until a new INST:nSEL is sent.
At power-up, the IEEE master Power Supply is automatically the one selected.
After sending INST:nSEL, it is recommended that you verify the command by sending INST:nSEL?,
otherwise the following commands may be sent to the wrong Power Supply.
Fig.2-1: Point To Point Connection

2.3 Communication Cables

GPIB cable - Use standard IEEE-488, 26 AWG GPIB cable up to 3 meters in length.
•
• RS485 link cable - Use serial link cable with RJ-45 shielded connectors (P/N: GEN/RJ45). Refer
+
to Z Series User Manual Fig.7-8.

CHAPTER 2: CONNECTION

+
Power Supply. Refer to Fig.2-1. Each Power Supply must
+
Power Supply. A maximum of 30 Z
4
Fig.2-2: Multi Drop Connection
+
units can be