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4-Wire Transmitters

Telmar 4 Wire
General Specification for 500 Series Non-Isolated Transmitters:
  • Power:117/230VAC+10% 50/60Hz 5Watts
  • Accuracy: ± 0.2% of Span @ 75ºF
  • Compensated Temp. Range: 0 to +140ºF
  • Stability: ± 0.02% / of Span
  • Output Ripple: 3.0mVRMS Max.

Standard Outputs:
  • 0-1mADC into 20KΩ Max. Lim. 5 mA
  • 1-5mADC into 4000Ω Max. Lim. 10 mA
  • 4-20mADC into 1200Ω Max. Lim. 25 mA
  • 10-50mADC into 400Ω Max. Lim. 60 mA
  • 1-5VDC @ 250Ω 0-1 VDC @ 50Ω
  • 0-5VDC @ 250Ω 0-10 VDC @ 500Ω

All 500 series transmitters available with no alarms, low alarm, high alarm and low/high alarms; unless indicated otherwise.

Model Specs Image (click for larger)
Model 501
Thermocouple, Non-Isolated
Calibrated Span 5VDC Min.
Thermocouple Types: J,K,T,R,S,E, & B
Impedance: 1 M Ohm Type.

The 501 series thermocouple transmitters are designed for general purpose instrumentation applications. The transmitter is housed in an all steel enclosure with front adjustable Zero and Span controls. All instruments are factory calibrated for specific input and output requirements. Excellent stability and repeatability are major features of these instruments. Options include low alarm and/or, high alarm.
  Telmar 501 & 514
Model 502
D.C. Millivolt, Non-Isolated
DC Millivolts
Impedance 1 Ohm Min.
Span 5mVDC Min. 100mVDC Max.
Zero Suppression –5% to 100% of Span

The 502 series millivolt transmitters converts the output of various millivolt sources such as analyzers and pyrometers to standard process voltage or current signals. It features high impedance input and excellent stability.
  Telmar 502 & 513
Model 503
D.C. Current, Non-Isolated
DC Current Span: 1mADC into 10Ohm
4-20mADC into 2 Ohm
10-50mADC into 1 Ohm
100mADC Max. into 1 Ohm

The 503 series DC current to current transmitters provides the instrument engineer with a means of expanding current loops and adding alarm functions to established loops with fixed resistances.
 Telmar 503
Model 504
D.C. Voltage, Non-Isolated
DC voltage
Span: 0.1VDC Min. to 600VDC Max.
Impedance: 1 Meg Ohm

The 504 series voltage transmitters will accept DC voltages from 0.1VDC to 600VDC and provide a 4-20, 10-50mADC or 1-5VDC output.
 Telmar 504
Model 505
Manual controller, Non-Isolated
Adjustable Calibrated Knob. (0 - 100%)
Alarms are not available on this model.

The 505000 is a manually operated transmitter producing a current or voltage output signal for manual loop control. The 505 features open and closed loop condition LED’s, and manual/auto transfer switch.
 Telmar 505
Model 506
D.C. Slidewire, Non-Isolated
Slidewire Resistance
Span: 100Ohm Min. 3000 Ohm Max.
Excitation: 0.5mA Typ. 1.0mA Max.

The 506 series transmitters convert the output of any 3 wire position, level or pressure potentiometer instrumentation to standard control loop signal levels. Span and zero are adjustable from the front panel.
 
Model 507 RTD
Non-Isolated
Nickel, Copper or Platinum 2 or 3 Wire with Lead Compensation 10 to 2200 Ohms @ 32ºF Nominal.
Minimum Span: Copper 235ºF
Nickel 15ºF, Platinum 30ºF
Excitation: 0.5mA Typ. 1.0mA Max.

The RTD to current transmitter converts the resistance change from any of the industry’s standard RTD’s into process control loop current or voltages. Front panel span and zero adjustments standard.
 Telmar 507
Model 508
Tachometer, Non-Isolated
Span 0-5Hz Min. 0-20,000Hz. Max
20MVRMS Min. @100Hz, Sine, Square or Pulsed Waveforms
Zero Suppression: -5% to 100% of Span Std.

The 508 frequency to current transmitter accepts input frequencies up to 20,000 Hz. Normal input signals are from electro-magnetic pick-ups, contact closures, or photocells to measure and control speed, flow, frequency or rate.
 Telmar 508
Model 509
Square Root Extractor, Non-Isolated
1-5mADC into 400 Ohm
4-20mADC into 100 Ohm
10-50mADC into 40 Ohm

The 509 square root transmitter is primarily used to convert the squared law signal received from differential pressure transmitters to standard mA DC loop currents.
 
Model 510
Strain Gauge, Non-Isolated
302 Pressure Transducer or any 4 wire Resistance Bridge. 100 Ohm Min. 1500 Ohm Max.
Span: 5mVDC Min.
Excitation: Regulated 5 to 15VDC

The 510 transmitter converts 4 wire bridge, load cells and pressure transducer inputs to standard current or voltage output signals. Transducer excitation voltage is standard on the 510 series.
 
Model 513
D.C. Millivolt, Isolated
DC Millivolts
Impedance: 1 M Ohm Typical
Span: 5mVDC Min. 100mVDC Max.
Zero Suppression ±100% Span. Std.
Excitation: Optional

The 513 millivolt to current transmitter converts various millivolt sources to standard current or voltage outputs. Input and output are transformer isolated.
 
Model 514
Thermocouple, Isolated
Thermocouple; All Std. I.S.A.
Calibrated Span 5mVDC Min.
Types: J,K,T,R,S,E, & B
Impedance: 1 M Ohm Typ.

This 514 thermocouple to current transmitter is a stable temperature compensated millivolt amplifier with 0.1% accuracy. Input and output are transformer isolated. Cold junction compensation is standard.
 
Model 515
D.C. Current, Isolated
DC Current
Span: 1mADC into 10 Ohm
4-20mADC into 2 Ohm
10-50mADC into 1 Ohm
100mADC Max. into 1 Ohm
Excitation: Optional

The 515 current transmitter provides the instrument engineer with a means of expanding current loops and adding alarm functions and guaranteed complete input to output isolation.
 
Model 516
RTD, Isolated
Nickel, Copper or Platinum
3 Wire with Lead Compensation 10 to 2200 Ohm @ 32ºF Nominal.
Minimum Span: Copper 235ºF
Nickel 15ºF, Platinum 30ºF
Excitation: 0.5mA Typ. 1.0mA Max.

The 516 is an isolated RTD to Current transmitter. Inputs are all standard RTD’s output is either a process control loop current or voltage. The 516 offers Input to output isolation, with multi-turn span and zero adjust located on the front panel.
 
Model 517
Slidewire, Isolated
Slidewire Resistance
Span: 100 Ohm Min. 3000 Ohm Max.
Excitation: 0.5mA Type. 1.0mA Max.

The 517 converts the output of any 3 wire position, level or pressure potentiometer instrumentation to standard control loop signal levels. The 517 has complete input to output isolation.
 
Model 518
Tachometer, Isolated
Span 0-5Hz Min. 0-20,000Hz. Max.
50mVRMS @100Hz, Sine, Square or Pulsed Waveforms.
Zero Suppression: ± 100% of Span Std.
Excitation: Optional

The 518 is a transformer isolated frequency to DC transmitter for use with AC tach-generators, magnetic pick-ups, photocells and line frequency measurements.
 
Model 520
A. C. Millivolt, Isolated
Span: 5mVRMS to 600VRMS Max.
Frequency Range: 5Hz to 2.5KHz ±0.25dB
Impedance: 1 M Ohm
Options: Excitation

Any AC signal span between 5 mV RMS and 600 VRMS can be converted to a standard loop current or voltage. The extended frequency range makes the 520 Series ideal for accelerometers and other AC signal transducer applications.
 Telmar 520
Model 521
Strain Gauge, Isolated
302 Pressure Transducer or any 4 wire Resistance Bridge
100Ohm Min. 1500 Ohm Max.
Span: 5mVDC Min.
Excitation: Regulated 5 to 24VDC

The 521 isolated strain gauge transmitter converts all pressure and load cell type signals into loop current or voltage output.
 
Model 522
D.C. Voltage,Isolated
DC voltage
Span: 0.1VDC Min. to 600VDC Max.
Impedance: 1 M Ohm
Excitation: Optional

The 522 isolated DC voltage to current transmitter will accept DC voltage from 0.1VDC to 600VDC and provide a 4-20, 10-50mADC or 1-5VDC output.
 Telmar 522
Model 523
A. C. Current, Isolated
0-5 amps: AC Standard
Accuracy: 0.2% of Span @ 75ºF
Frequency Range: 25 to 400Hz
Impedance: .05 Ohm shunt 0-5 amps AC

The 523 AC current transmitter provides complete isolation between input, output and ground. Standard input is 0-5 amps AC and by using an external current transformer, the input range may be extended to 1000 amps.
 Telmar 523

Model Specs Image (click for larger)
511xxx Pressure to Current Pneumatic Instrument
512xxx Current to Pressure Pneumatic Instrument
611000 Pressure to Voltage/Current DIN Rail Mount Pneumatic Instrument
612xxx Current to Pressure/Voltage Pneumatic Instrument
568xxx AC Voltage Two-wire Isolated Transmitter
571xxx Thermocouple Two-wire Isolated Transmitter
572xxx DC Millivolt Two-wire Isolated Transmitter
596xxx AC Current Two-wire Isolated Transmitter
573xxx DC Current Two-wire Isolated Transmitter
574xxx DC Voltage Two-wire Isolated Transmitter
576xxx Slide Wire Two-wire Isolated Transmitter
577xxx RTD Two-wire Isolated Transmitter
578xxx Tachometer Two-wire Isolated Transmitter
523000 AC Current Four-wire Isolated Transmitter
618xxx Tachometer, DIN Railmount Options: Alarms, Open Circuit Input
505000 505 Manual Loading Station Manual Control of Loop
540xxx 540 Thermocouple Signal Alarm
541xxx 541 DC Current Signal Alarm
542xxx 542 DC Millivolt Signal Alarm
543xxx 543 DC Voltage Signal Alarm
544xxx 544 RTD Signal Alarm
545xxx 545 AC Voltage Signal Alarm
547xxx 547 Tachometer Signal Alarm
548xxx 548 Slidewire Signal Alarm
549xxx 549 Strain Gauge Signal Alarm
807xxx RTD Transmitter 2-Wire Head Mount, Explosion Proof, NEMA
815000 Loop Isolator 2-Wire Head Mount, Explosion Proof, NEMA
571004 Thermocouple, Indicating Close Coupled Temperature Transmitter
571006 Thermocouple, Non Indicating Close Coupled Temperature Transmitter
577004 RTD Indicating Close Coupled Temperature Transmitter
577066 RTD Non-Indicating Close Coupled Temperature Transmitter
577506 RTD Field Selectable Close Coupled Temperature Transmitter
680000 AC TO DC Power Supply 115/230V AC to 24V DC @ 250mA DC DIN Rail Mount 24V DC
681000 AC TO DC Power Supply 115/230V AC to 24V DC @ 630mA DC DIN Rail Mount 24V DC
580000 AC TO DC Power Supply 115/230V AC to 24V DC @ 125mA NEMA 4
580002 AC TO DC Power Supply 115/230V AC to 24V DC @ 125mA NEMA 7/9
WE-100 AC TO DC Power Supply 115V AC (optional 230) to 24V DC (optional 5 to 32V DC) @125mA DC
WE-103 AC TO DC Power Supply 115V AC to 5, 12, 15, 24V DC @ 2.4, 1.0, 0.8 & 0.56 A DC
WE-104 AC TO DC Power Supply 115V AC to 5 to 24V DC 1A to 500mA DC
WE-107 AC TO DC Power Supply 115V AC 5 to 24V DC 1.0A to 300mA DC
WE-108 AC TO DC Power Supply 115V AC 5 to 24V DC 2.4A to 0.56A DC
WE-109 AC TO DC Power Supply 115V AC 5 to 24V DC 6.0A to 1.5A DC
WE-110 DC TO DC Power Supply 115V AC 5 to 24V DC 6.0A to 1.5A DC
WE-111 DC TO DC Power Supply 12V DC to 62V DC to 5 to 24V DC
WE-114 AC TO DC Power Supply 115V AC to 24V DC 250mA Wall Mount
WE-117 AC TO DC Power Supply 115V AC to 5 to 24V DC @ 12.5 to 3.5A DC
WE-118 AC TO DC Power Supply 115V AC to 5 to 24V DC @ 25 to 5A DC
WE-119 AC TO DC Power Supply 115V AC to 5 to 24V DC @ 36 to 7.5A DC
WE-120 AC TO DC Power Supply 115V AC to 5 to 24V DC @ 50 to 11A DC
586000 LCD Digital Meter Digital Meter LCD Loop Powered 3 1/2 Digit NEMA 4X
594000 LCD Digital Meter Digital Panel Meter LCD Loop Powered 3 1/2 Digit
594001 LCD Digital Meter Digital Panel Meter LCD Loop Powered 3 1/2 Digit NEMA 4X
594002 LCD Digital Meter Digital Panel Meter LCD Loop Powered 3 1/2 Digit Explosion Proof
594004 LCD Loop Powered, Rate Surface Panel/Mount Digital Meter LCD Loop Powered 3 1/2 Digit NEMA 4/7/9 Explosion Proof
598000 LED Indicator Digital Panel Meter LED 3 1/2 Digit Panel Mount
598001 LED Indicator Digital Panel Meter LED 3 1/2 Digit NEMA 4X
598002 LED Indicator Digital Panel Meter LED 3 1/2 Digit Explosion Proof NEMA 7/9

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CALL OR EMAIL US TO REQUEST A QUOTE!

(614) 755-5091