RIY
The Interface Solution Experts 1
Introduction
Moore Industries’ Programmable Isolated RTD
Transmitter (RIY) is a 2-wire, microprocessor-based
instrument that converts an RTD or ohms input into a
4-20 mA output. The output is field-configurable to be
linear with temperature or linear with an ohms input.
The highly accurate RIY
features easy-to-use push
buttons, a rotary switch, and a SIP switch for field
calibration and configuration.
This manual contains descriptive, calibration, installa-
tion, and operation information for the RIY. Also
included in this manual is a quick reference page
containing often referred to setup and hookup infor-
mation (see appendix A).
Notes and cautions are provided throughout this
manual to help you avoid minor inconveniences
(NOTES) and equipment damage (CAUTIONS).
Description
The RIY is a loop-powered, RTD transmitter that
accepts an input from 2-, 3-, or 4-wire RTD’s, or a
resistance source. The RIY processes the input
signal using digital technology and produces a
proportional 4-20 mA output.
Tactile push buttons, located on the front panel, are
used to set the zero and span (full-scale). The values
entered are stored in an EEPROM and remain, even
when power is removed, until the values are changed
by the user. The push buttons provide greater
calibration accuracy and stability than do potentiom-
eter adjustments of non-microprocessor-based
instruments.
A 4-digit, liquid crystal display (LCD) is standard on
the RIY. (The RIY is available without the LCD.) This
display provides readouts of the applied input (either
in temperature or ohms), and it displays problem
codes. (The LCD is required for
quick ranging.)
Switches are used to configure several functional
characteristics of the RIY. Each of these switches is
accessible without disassembling the unit. The
switch-selectable features include:
• Readouts in degrees Celsius or Fahrenheit, or
ohms (only on units with LCD’s)
• Sensor type and number to be input to the RIY
• Upscale/downscale drive
• Quick/standard ranging
• Keyboard lockout/enable
The RIY is available in two housing styles; a hockey-
puck (HP) housing and a DIN-style housing. Both
housing styles have the same operational features
and offer the same options. The intended application
of the RIY must be clearly identified to determine
which housing style is most suitable.
The standard HP-style housing is equipped with
spring clips for mounting in explosionproof enclo-
sures. An RIY packaged in an HP-style housing and
equipped with flange plates (FL Housing option) is
designed to mount on a flat surface or on relay tracks.
The configuration switches for HP-style units are
accessible through a removable panel at the rear of
each unit.
The all-aluminum DIN-style housing snaps directly
onto standard G-type or Top-hat DIN rails. The
configuration switches for DIN-style units are acces-
sible through a removable panel on the upper right-
side panel of the unit. The physical layout of the
configuration switches in DIN-style units is identical to
that of HP-style units.
Table 1 contains the operational and performance
specifications for the RIY.
Options
The RIY is available with several optional features.
The following is a brief description of the most
popular options:
DD Option
— Downscale drive on loss of input
(upscale drive is standard)
ND Option
— No display (LCD)
For availability of other options, including intrinsic
safety approvals, contact your local Sales Represen-
tative or Moore Industries’ directly.
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