KEPCO TMA 4882-27 - Manual (Page 13)

TMA4882-27 SVC 021910
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 TMA 4882-27 Power Module Controller (Figure 1-1), manufactured by Kepco, Inc., Flush-
ing, N.Y. U.S.A. Parts lists and schematic diagrams are included in Section 4.
1.2 GENERAL DESCRIPTION
The Kepco model TMA 4882-27 is a Power Module Controller which consists of a Single-Board
Computer (SBC) and interface card housed in a 1-23/32” high by 19” wide by 15” deep case; it
has the capability to program, control and monitor the outputs of up to 27 Kepco MAT, MBT,
MST or BOP power supplies (power modules). The TMA 4882-27 communicates with its Host
computer over the IEEE 488 bus (GPIB) using either CIIL (Control Interface Intermediate Lan-
guage) or SCPI (Standard Commands for Programmable Instruments) Languages. An auxiliary
input port allows for communication via the RS 232-C (EIA 232) standard serial communications
bus. The TMA 4882-27 communicates with the MAT, MBT, MST or BOP 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 controller are defined by the IEEE
488 Standard, and described in Table 3-1.
Connection to the power module is done through the control bus, which is accessible via a 9 pin
D type connector, provided on the rear panel. The interconnection to the Host Computer on the
GPIB is made via an IEEE 488 standard cable. If the serial port is used for communications
between the controller and a computer terminal, a 9 pin null-modem RS 232-C connector/cable
is required.
An opto-isolated, active high or non-isolated, active low, emergency output shut-down input is
provided on the 15 pin D type female connector located on the rear panel. On the same connec-
tor, two additional lines provide a normally open contact indicating the proper functioning of the
internal microsystem (Discrete Fault Line). If either a serious malfunction or catastrophic error in
the TMA 4882-27 occurs, the contacts will close (see PAR. 3.2). A Status Monitor Reset connec-
tor, available as an accessory (see Table 1-2), allows the Discrete Fault line to reset all units
connected to the Control Bus (see PAR. 3.2.2).
1.3 SPECIFICATIONS (REFER TO FIGURE 1-3 AND TABLE 1-1)
The Host Computer can set the output voltage with current limit, or the output current with volt-
age limit. The Host Computer can then have the TMA 4882-27 read back the actual output volt-
age and current delivered by each of the power modules to their respective loads. The TMA
4882-27 is continually polling all of the power modules on the Control Bus for flags of cata-
strophic and noncatastrophic errors. All data transmissions over the GPIB are ASCII encoded.
The values for the command parameters can be written in integer, decimal or scientific notation.
The responses from the TMA 4882-27 are detailed in Section 3 of this manual.
FIGURE 0-1.