MST 488-27HT 051120 1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains the specifications and instructions for the installation and operation of the
Model MST 488-27HT Power Module Controller (Figure 1-1), part of the Kepco Model 27553
Mainframe manufactured by Kepco, Inc., Flushing, N.Y. U.S.A.
This controller is designed to control and communicate with Kepco’s MST-MHT Series of Power
Modules. Information regarding the MST-MHT Power modules can be found in the MST-MHT
Series Operator Manual which can be downloaded from the Kepco web site at
www.kepcopower.com/support/opmanls.htm#mst
1.2 GENERAL DESCRIPTION
The Kepco Model 27553 Mainframe is a modular power system that is a functional replacement
for a Keysight 66000© Mainframe. Model 27553 is comprised an RA 55H Rack adapter which
has nine slots and the MST 488-27HT Controller which is installed in one of the RA 55H slots.
The MST 488-27HT Controller is designed to program, control and monitor Kepco MST-MHT
Series power modules installed in the remaining slots of the RA 55H which are functional
replacements for Keysight 61000© Series power modules,.
The MST 488-27HT Controller power up state is to allow Kepco’s MST-MHT power modules to
emulate the Keysight 61000© Series power modules with existing test programs and test
requirement documents. The MST 488-27HT Controller can be controlled as a MST 488-27 by
sending a command (see PAR. B.6) during software initialization to allow the MST 488-27HT
controller and the MST-MHT power modules to operate as defined in the MST 488-27 (non HT
suffix) Programmer Operator Manual which can be downloaded from the Kepco web site at
www.kepcopower.com/support/opmanls.htm#mst
The MST 488-27 drivers ( Labview and IVI ) automatically perform this configuration during the
KpDCpwrInitalizewithOptions function.
The MST 488-27HT has the capability to program, control and monitor the outputs of up to 27
specialized Kepco MST-MHT power supplies (power modules) by adding additional RA 55H
Rack Adapters to the bus. The MST 488-27HT communicates with its Host computer over the
IEEE 488 bus (GPIB) using SCPI (Standard Commands for Programmable Instruments) Lan-
guage. A remote terminal program can allow communication via the RS 232-C (EIA 232) stan-
dard serial communications bus. The MST 488-27HT communicates with the MST-MHT series
using the IEEE1118 two-wire serial bus, hereafter referred to as the Control Bus, which allows
control over distances up to a maximum of 1000 feet (300 meters) (see Figure 1-2).
The IEEE 488 GPIB interface functions implemented by the MST 488-27HT controller are
defined by the IEEE 488 Standard, and described in Table 3-1.
The MST 488-27HT Controller interfaces to an MST-MST power module via the RA 55H Rack
Adapter; (part of Kepco MSP 27553 mainframe). Interconnection to the Host Computer on the
GPIB is made via an IEEE 488 standard cable. If a remote terminal program is used for commu-
nications between the controller and a computer terminal, a 9 pin null-modem RS 232-C con-
nector/cable is required.
The MST 488-27HT Controller is comprised of a single-board computer (SBC) and power sup-
ply housed in a 1/9 Rack (7” high by 1-3/4” wide by 20-1/4” deep) case (see Figure 1-3).
