IST
Page 1
The Interface Solution Experts
Introduction
Moore Industries’ Isolating Signal Transmitter, the
IST, is used to provide isolation between the input
and output in an instrumentation loop. A wide range
of input/output configurations are available.
This manual contains the information necessary to
calibrate, install, operate, maintain, and troubleshoot
the IST. It includes a brief unit description, a table
of performance and operational specifications, and
an explanation of Moore Industries’ model/serial num-
ber-based product data tracking system.
The following guidelines are used throughout the
manual:
WARNING
– Hazardous procedure or condition that
could injure the operator.
Caution
– Hazardous procedure or condition that could
damage or destroy the unit.
Note
– Information that is helpful for a procedure, con-
dition, or operation of the unit.
Description
The IST is configured at the factory to accept either
current or voltage, non-isolated input, and to provide
proportional, isolated output; breaking the galvanic
path between a transmitted signal source and the re-
ceiving/recording device.
The IST is a 4-wire transmitter powered by 117, 230,
or 240 Vac, according to customer requirement. AC
power can be set or changed in the field by moving
jumpers on the unit’s internal printed circuit (PC) board.
24Vdc is also available upon request, but it is not
jumper selectable.
The unit is packaged in a compact, DIN-style hous-
ing, designed for use with either G-type DIN rail (DIN
EN50035) or Top-hat DIN rail (DIN EN50022), mak-
ing it ideal for installations where space is at a pre-
mium.
Controls
The IST has two, labeled, multiturn potentiometers
(pots) located on its front panel. These control the
unit’s zero and span settings. The Calibration Sec-
tion of this manual contains the instructions for set-
ting the pots.
Internally, the IST has three jumpers located on a PC
board. The setting of these jumpers determines which
of the IST’s rated power inputs, 117, 230, or 240 Vac,
is operational in the unit. Typically, the jumpers are
positioned according to customer order specification
before shipment, but they can be reset at any time.
Jumpers are not available on 24dc powered units.
