SITRANS RD300 Siemens

Область применения



The RD300 is a remote display for level, flow, pressure, weighing, and other process instruments. This display also acts as a multi-purpose, easy to use rate/totalizer ideal for flow rate, total, and control applications.

Data can be remotely collected, logged and presented on your local computer using the free downloadable RD Software.

The display accepts a single or dual input of current and voltage. This makes the RD300 an ideal fit for use with most field instruments.

The RD300 can be set up as a standard panel mount, or combined with optional enclosures to allow it to house up to 6 displays.

  • Key Applications: tank farms, pump alternation control, local or remote display of level, flow, pressure and weighing instrument
    values, PC monitoring and data logging with RD Software.

Обзор



The SITRANS RD300 is a panel mount remote digital display for process instrumentation and acts as a multi-purpose, easy to use, rate/totalizer ideal for flow rate, total, and control applications.

Чертеж



 

SITRANS RD300 dimensions, in mm (inch)

Особенности


  • Easy setup and programming via front panel buttons or remotely using RD software
  • Display readable in sunlight
  • Input: accepts current and voltage
  • Single or dual 24 V DC transmitter power supply
  • Serial communication using built in protocol or Modbus RTU
  • Supports up to 8 relays and 8 digital I/O for process control and alarming
  • 32-Point linearization, square root or exponential linearization
  • Multi-pump alternation control
  • Supports total, grand total or non-resettable grand total
  • 9-digit totalizer with total overflow feature
  • Large dual-line, 6-digit display
  • Configure, monitor, and datalog from a PC
  • Dual-input option with math functions: addition, difference, average, multiplication, division, minimum, maximum, weighted average, ratio, concentration

Схема подключения



 

SITRANS RD300 connections

Технические данные



 

Mode of operation

 

Measuring principle

Analog to digital conversion

Measuring points

  • 1 or 2 instruments

Input

 

Measuring range

 

• Current

  • 4 ... 20 mA, 0 ... 20 mA

• Voltage

  • 0 V DC ... +10 V DC, 1 ... 5 V,
    0 ... 5 V

Output signal

 

Output

  • 4 ... 20 mA (optional)

 

  • Modbus RTU

Relays

2 or 4 SPDT (Form C) internal
and/or 4 SPST (Form A) external;
rated 3 A at 30 VDC and 125/250
VAC resistive load; 1/14 HP
(50 W) at 125/250 V AC for inductive
loads (optional)

Communications

  • RS 232 with Modbus RTU

 

  • RS 422/485 with Modbus RTU

Accuracy

 

4 ... 20 mA optional output

± 0.1 % FS ± 0.004 mA

Process input

± 0.05 % of span ± 1 count,
square root: 10 ... 100 % FS

Rated operating conditions

 

Ambient conditions

 

Storage temperature range

-40 ... +85 °C (-40 ... +185 °F)

Operating temperature range

0 ... 65 °C (32 ... 149 ºF)

Design

 

Weight

269 g (9.5 oz) (including options)

Material (enclosure)

  • 1/8 DIN, high impact plastic,
    UL94V-0, color: gray

 

  • Optional plastic, steel and stainless
    steel (Type 304, EN 1.4301)
    NEMA 4 enclosures

Degree of protection

Type 4X, NEMA 4X, IP65 (front
cover); panel gasket provided

Electrical connection

 

mA output signal

2-core copper conductor, twisted,
shielded, 0.82 ... 3.30 mm² (18 ...
12 AWG), Belden 8 760 or equivalent
is acceptable

Electrical connection and relay connection

Copper conductor according to
local requirements,
rated 3A at 250 V AC

Power supply

 

Input voltage option

85 ... 265 V AC, 50/60 Hz;
90 ... 265 V DC, 20 W max. or
jumper selectable 12/24 V DC
± 10 %, 15 W max

Transmitter power supply

Terminals P+ & P-: 24 V DC
± 10 %, 12/24 V DC powered
models selectable for 24, 10, or 5 V DC supply (internal jumper J4),
85 ... 265 V AC models rated at
200 mA max, 12/24 V DC powered
models rated at 100 mA max,
at 50 mA max for 5 or 10 VDC
supply.

External loop power supply

35 V DC max.

Output loop resistance

  • 24 V DC, 10 ... 700 Ω max.

 

  • 35 V DC (external), 100 ... 1 200 Ω max.

Displays and controls

 

Main display

0.6 inch (15 mm) high, red LEDs

Second display

0.46 inch (12 mm) high, red
LEDs, 6-digits: each (-99 999 ...
999 999)

Memory

  • Non-volatile

 

  • Stores settings for minimum of
    10 years if power is lost

Programming

  • Primary: front panel

 

  • Secondary: Meter Copy or PC
    with SITRANS RD Software

Certificates and approvals

CE, UL, CUL

Options

 

Enclosures

Plastic, steel and stainless steel
(Type 304, EN 1.4301) NEMA 4
and 4X enclosures