• Spans from 8°C to 1024°C
• Linearized for Platinum RTDs
• Provides a Fully Isolated DC Output Proportional to RTD Input
• Plug-In Terminal Blocks
• 2, 3, or 4 Wire Connections
• User-Settable Input and Output Ranges
• Fully Labeled Jumper Positions for Easy Range Settings
• Standard DIN-Rail Mount with Easy Snap-On Snap-Off
• Connections and Ranging Readily Accessible from the Front
• Choice of Power Options
• User Write-On Label
• Permanent Warranty

The DM4001 provides an isolated voltage or current output proportional to temperature as measured with an RTD.

The product can measure 2, 3, or 4 wire resistance elements. The 3 wire configuration provides compensation for lead wire resistance. The 4 wire configuration provides true measurement of the resistance element without lead wire error.

Linearization is provided for .00385 and .00393 alpha platinum resistance elements.

All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning. It utilizes a feedback VCO to develop a pulse train with a duty cycle proportional to the input signal amplitude. This pulse train is coupled through a pulse transformer to the output circuitry, where the duty cycle data is converted to a proportional DC output level.

Connections are made via two 4-pin plug-in terminal blocks. These terminal blocks allow the product to be removed without unwiring the connections.

TYPICAL APPLICATIONS
Useful for temperature monitoring, control and data acquisition.

RTD INPUT 100 & 1000 ohm Pt., 10 ohm Cu. .00385 or .00392 alpha 2, 3, or 4 wire INPUT Span Ranges (°C) 8, 16, 32, 64, 128, 256, 512, 1024 Linearization Error < ± .2% Open RTD Protection Upscale or Downscale EXCITATION 10 ohm 100 ohm 1000 ohm 10 mA 1 mA .1 mA INPUT OFFSET + 0%, 20%, 40%, 60% of span SPAN ADJUSTMENT +5% to -55% of selected range ZERO ADJUSTMENT + 30% of selected offset OUTPUT Voltage 0/.25 V 0/1 V 1/5 V 0/5 V 0/10 V -5/+5 V -10/+10 V Current 0/1 mA 0/4 mA 4/20 mA 0/20 mA

OUTPUT LOGIC Normal or Reverse Acting DRIVE CAPABILITY Voltage 5 mA Current >24 V Compliance OUTPUT RIPPLE (Peak-to-Peak) <0.1% of full scale ISOLATION Resistance >500 megohms Voltage Rating >1000 VAC rms sinewave ACCURACY ±0.1% of span COMMON MODE REJECTION >100 dB, DC to 60 Hz OPERATING TEMPERATURE 14 to 140 °F/-10 to +60 °C TEMPERATURE STABILITY ±(0.01% of span) /°C POWER Standard 115 VAC + 10%, 50/60 Hz 230 VAC + 10%, 50/60 Hz Optional 115/230 VAC Selectable ±10%, 50/60 Hz 24 VAC + 10%, 50/60 Hz 24 VDC (21 to 32 VDC) 12 VDC (10 to 16 VDC) Wattage 2.5 W max

Terminal 1 Terminal 2 Terminal 3 Terminal 4 Terminal 5 Terminal 6 Terminal 7 Terminal 8

Current Supply + Input + Input - Current Supply + Output + Output - Power AC L1 or DC + Power AC L2 or DC -