MTW/DGW Type Thermal Resistance Input Temperature Transmitter

Thermal Resistance Input Signal Isolation Processor 1.Intrinsical-safe and explosion-proof 2.Magnetic isolation technology

MTW/DGW Type Thermal Resistance Input Signal Isolation Processor

   

Functional Overview 

MTW/DGW Type Thermal Resistance Input Signal Isolation Processor is a intrinsically safe explosion-proof type instrument with card-mounted and modular construction.It converts the resistance changes 

of Thermal Resistance to 4~20m ADC (or 1~5VDC) signal output which has a liner relationship with its

 temperature.The isolative part adopts magnetic isolation technology, which is verified by national anti-explosive

 verification authority. Its intrinsic safety explosion-proof level reaches (ib) II CT6. Moreover, the main technical

 performance indexes of this instrument exceed domestic similar products.

 Technical Parameters

Input Channel: Standard Thermal Resistance (three-wired) Input Range: ≥20°CZero Point Shift: 5~10% of the rangeOutput: 4~20mADC (or 1~5VDC)Output Resistance: 250Ω (1~5VDC output);               >500k Ω (4~20mADC output)Load Resistance: 250~350 Ω (4~20mADC output)Input Lead Wire Resistance Effect: <5 Ω/ wire ( three wire equal)Precision: Span≥50mV, ±0.3%;         Span<50mV, ±0.5%Compensating Error of the Cold Junction:≤1°C Respond Time: <1sCommon Code Interference: 50HZ, <5mVThe Maximum Allowable Voltage: 220VAC/DC (Measured under non-intrinsic safety)The Maximum Open-Circuit Voltage: 2VDC (Measured under intrinsic safety)The Maximum Short-Circuit Current: 100mA (Measured under intrinsic safety)Zero Point Adjustment: ZERO potentiometerSpan Adjustment: SPAN potentiometerPower Source: 24VDC±10%Consumption: <1.5WAmbient Temperature: 0~+50°CRelative Humidity: <90%RH (non-condensing)Isolation Resistance: Power source, input and output≥100M ΩIsolation Intensity: Power source/input/output 1000VDC/ minuteMaintenance: Hot plug and unplug are allowed under wiring installation stateWeight: About 150gIntrinsic Safety Explosion-Proof Grade: (ib) II CT6Dimension: 29×106×72 (width×height×depth) mmInstrument Installation: Standard 35mm DIN guide rail card loading

Type Selection

Type number           Input signal      Output signal

MTW/DGW -121♦      Cu50           -50~150

MTG/DGW -122♦      Cu100          -50~150

MTG/DGW -1323♦     Pt10           -100~500

MTG/DGW -124♦       Pt100           -200~600

Note: If “♦” is “0”, the output is 4~20mADC

           If “♦” is “1”, the output is 1~5VDC

Please conduct us if you want special signal output

MTW/DGW Type Thermal Resistance Input Temperature Transmitter