Siemens SITRANS RD300, Operating Instructions Manual, Page: 7 / 110

SITRANS RD300
A5E31917845 SITRANS RD300 – OPERATING INSTRUCTIONS Page 1
SITRANS RD300
The SITRANS RD300 is a panel mounted digital display for process
instrumentation and acts as a multi-purpose, easy to use rate/totalizer ideal for
flow rate, total, and control applications. It accepts current and voltage signals (e.g.
4-20 mA, 0-10 V). Three of the front panel buttons can be custom-programmed for
specific operation.
The basic model includes an isolated 24 VDC transmitter power supply that can
be used to power the input transmitter or other devices. An additional isolated
24 VDC power supply is included with the 4-20 mA output option. A digital input,
F4, is standard.
A fully loaded RD300 rate/totalizer meter has the following: four SPDT relays,
4-20 mA output, and two 24 VDC power supplies. The RD300 capabilities may be
enhanced by adding the following external expansion modules: four SPST relays
(creating an eight-relay rate/totalizer), two digital I/O modules with four inputs and
four outputs each, and USB, RS-232 or RS-485 communication adapters.
The eight relays can be used for alarm indication or process control applications. The
4-20 mA isolated output, Modbus RTU serial communications, and digital I/O options
make the RD300 an excellent addition to any system.
Benefits

0-20 mA, 4-20 mA, 0-5 V, 1-5 V,

10 V Inputs

NEMA 4X, IP65 Front

Input Power Options Include 85-265 VAC or 12-24 VDC

Large Dual-Line 6-Digit Display, 0.60" & 0.46"

Dual-Scale for some Level Applications – Single Input

Sunlight Readable Display Models

Isolated 24 VDC Transmitter Power Supply

Signal Input Conditioning for Flow

Programmable Displays & Function Keys

Rate Displayed as Units per Second, Minute, Hour, or Day

Total, Grand Total or Non-Resettable Grand Total

9-Digit Totalizer with Total Overflow Feature

32-Point Linearization, Square Root or Exponential Linearization

Multi-Pump Alternation Control

2 or 4 Isolated 4-20 mA Output for Rate/Total/Grand Total

External 4-Relay & Digital I/O Expansion Modules

USB, RS-232, & RS-485 Serial Communication Options

Modbus
®
RTU Communication Protocol Standard

Free USB Programming Software & Cable