Transmitters Field Mount Transmitters Temperature RTD FDT5400 (Platinum, Copper, Nickel)
Monday, 20 June 2011 00:34 Last Updated on Sunday, 21 August 2011 21:29 Written by Administrator

FDT5400 FIELD MOUNT TRANSMITTER RTD INPUT

 
FDT5400: 100 ohm Platinum RTD 
FDT54x0: reserved for other RTD styles. Contact factory with your requirements.

  • NEMA 4X Splashproof Enclosure 
  • 3-1/2 Digit Display 
  • Available for all RTD Types 
  • Linearizes Platinum RTDs 
  • 3-Wire Lead Compensation Standard 
  • Urethane-Coated Circuit Boards 
  • AC or DC Power Options

 

FDT5400
PDF
DATA SHEET

FDT5400 Series RTD Input Transmitters provide an isolated DC output proportional to temperature as measured by a resistance thermometer (RTD). Model FDT5400 specifically designates 100 ohm platinum RTD input: additional model numbers are reserved for other RTD types.

Standard three-wire input circuitry compensates for lead wire resistance: a 4-wire input option is available. Platinum RTDs are linearized to provide true temperature indication. (Other types may or may not be: contact us to discuss your specific requirements.) A low-drift input amplifier helps assure accurate readings under varying ambient conditions.

A rugged NEMA 4X splashproof, corrosion-resistant housing protects the transmitter in outdoor and industrial environments. The circuit boards are urethane coated for protection against condensation and contaminants. FDT5400 Series transmitters include a 3-1/2 digit user-rangeable display to provide local process indication in degrees or other engineering units.

Available options include AC and DC power choices and reverse-acting transmitter (decreasing output with increasing input).

For field mount transmitters without a display, select any plug-in transmitter module plus our ENCL-1 NEMA-4X enclosure. (see Accessories page)

ORDERING INFORMATION

Model Number: 

Specify Model FDT5400 for use with 100 ohm platinum RTDs. Other model numbers will be assigned upon request for other RTD types. Contact factory for non-RTD resistance inputs.

Display: 

If not otherwise specified, the display will be calibrated in degrees per your input range. Other calibrations are possible: see "Display Capabilities" specification, below.

Power: 

Add suffix A (for example, FDT5400A) for AC power, D for DC power. Specify 115Vac, 230Vac, 12Vdc or 24Vdc.

RTD Type:

 Model FDT5400: 100 ohm platinum. Others as determined by assigned model number.

Input Range: 

Specify any input range allowed by the "Input Capabilities" spec, below.

Output Range: 

Specify any DC voltage or current range allowed by the "Output Capabilities" spec, below.

4-Wire RTD Input: 

Specify Option 4W.

Reverse-Acting Transmitter (decreasing output with increasing input): 

Change last digit of the model number to 1 (for example, FDT5401A).

Loop-Powered Output: 

 4/20mA "current sink" output stage for connection to devices whose inputs provide 24Vdc loop excitation. Change last digit of the model number to 2 (for example, FDT5402A).

Urethane Coating: 

Specify Option U.

Conduit Opening: 

Standard: None. The enclosure has knockouts. Option NPT: Single 1/2 inch NPT fitting (glass-fiber reinforced nylon) at the bottom of the housing.

ELECTRICAL CONNECTIONS

Connections are made to 8 terminals within the enclosure:

1: RTD. 
2: RTD (same end of RTD as terminal 1). When connecting to 2-wire RTD, jumper terminals 1 and 2. 3: RTD (opposite end) 
4: Standard - no connection. Option 4W - 4th wire of RTD (same end as terminal 3). 
5: Output plus. 
6: Output minus. 
7: Power (AC or, if DC power option, DC plus). 
8: Power (AC or, if DC power option, DC minus).

DETAILED SPECIFICATIONS

RTD Type: 

Any RTD from 10 to 2,000 ohms. (Model FDT5400 for 100 ohm platinum, other models FDT54x0 for other types. Contact factory. Specify RTD type, resistance & slope.)

Input Connection: 

3-wire connection is standard. Specify Option 4W for 4-wire RTD.

Input Capabilities: 

Minimum span 10 deg. C (18 deg. F) or 1 ohm, whichever is greater. Any range up to maximum covered by RTD. Offset ranges are allowed.

Voltage Output Capabilities: 

1 volt minimum output span, -10 to +15V absolute limit. Offset ranges are allowed. Maximum output load, 10mA (1Kohm at 10V output).

Current Output Capabilities: 

1mA minimum output span, 0 to +25mA absolute limit. Positive offsets are allowed, negative outputs are not. Output drive capability, 24V (1,200 ohms max. at 20mA output).

Display Capabilities: 

Low end and full scale readings may be anywhere between -1999 and +1999 counts. A fixed decimal point may be added in any position. Minimum span (full scale minus low end) is 10 counts. Reverse-acting display is possible (full scale reading downscale from low end). Display may be re-ranged by user. (Display is normally calibrated in degrees per the input range. If other settings are desired, please specify on your order.)

Endpoint Accuracy (factory calibration): 

+/-0.1% of span or 0.02 ohms, whichever is greater.

Adjustability: 

Zero and span each are adjustable approx. +/-15% of span.

Linearity: 

Platinum RTDs are linearized. Copper is inherently linear. Contact factory for information on others.

Response Time: 

Under 100 milliseconds.

Isolation: 

3-way (Power/Input/Output) 1,500Vac rms (2,100V peak).

Guaranteed Operating Temperature: 

-10 to +60˚C (14 to 140˚F).

Temperature Stability: 

+/-(0.02% of span plus 0.002˚C) per ˚C, or better.

Power Requirements: 

AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W.