YOKOGAWA MLD User Manual Download Page 4

 
 

IM 61A01A01-01E-A 

 
4.  WIRING 

 

 

The loop powered indicator series is powered by the current output loop and does not require external power. All devices must be wired in series 
with the current loop. Twisted pair shielded cable is recommended.  
 
 
The following is an example of the MLD Loop Indicator connected to an EJA Pressure Transmitter (Note: The EJA Transmitter below can be 
replaced with any 4-20mA 2 wire device.)

      

 

 

 

 

The Loop Indicator is available in FM Explosion Proof and CSA Explosion Proof types for hazardous locations. Wire sealing is required for these 
approvals. The following diagrams show some wire sealing examples.  

 

  

For Flameproof type, use Flameproof Packing Adapter or Flameproof Conduit in connection above. 
 

Summary of Contents for MLD

Page 1: ...IM 61A01A01 01E A 4th Edition User s Manual IM 61A01A01 01E A Model MLD Loop Powered Process Indicator ...

Page 2: ...s a DC current signal from electronic transmitters and indicates process measurement values This instruction manual gives instructions on handling mounting and wiring of the MLD indicator 2 MODEL CODE AND SPECIFICATIONS STANDARD SPECIFICATIONS Voltage Drop 1 8V typ 2V max Scale 0 1999 w decimal Accuracy 0 05 of full scale 1999 1 count Operating Temperature Range 20 to 60 C Temperature drift 0 3 Co...

Page 3: ...ng is a NEMA 4X Explosion Proof housing so it can be mounted outside in the field Do not install the unit in the following conditions Extreme Temperatures beyond the temperature rating of the instrument High vibration areas above the vibration rating of the instrument Extremely corrosive environments MOUNTING EXAMPLES ...

Page 4: ...an example of the MLD Loop Indicator connected to an EJA Pressure Transmitter Note The EJA Transmitter below can be replaced with any 4 20mA 2 wire device The Loop Indicator is available in FM Explosion Proof and CSA Explosion Proof types for hazardous locations Wire sealing is required for these approvals The following diagrams show some wire sealing examples For Flameproof type use Flameproof Pa...

Page 5: ...IM 61A01A01 01E A MOUNTING IN HAZARDOUS LOCATIONS ...

Page 6: ...eading 4mA Adjustment 20mA Adjustment Minimum 20mA Adjustment Maximum SW1 SW2 SW3 SW4 SW5 000 1200 1999 OFF OFF OFF OFF OFF 000 600 1200 ON OFF OFF OFF OFF 000 400 600 OFF OFF ON OFF OFF 000 200 400 ON ON ON OFF OFF 000 100 200 ON ON ON ON OFF 5 Set the Decimal value as follows a If tenths ex XXX X set SW8 on b If hundredths ex XX XX set SW7 on c If thousandths ex X XXX set SW6 on 6 The values to ...

Page 7: ... be the need for the customer to change the angle of the display The following are procedures for the display rotation Display Rotation 1 Remove power from the unit 2 Remove the glass cover from the display side 3 Remove the 2 screws holding the mounting plate to the standoffs 4 Rotate the display to the desired position can be rotated in 90 degree increments 5 Replace and tighten firmly the 2 scr...

Reviews: