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MD-21  
Power
  MD-21 VAC  MD-21 115 VAC  MD-21 DC  MD-21 36-55 VDC   
Rated voltage: 230 VAC
  		115 VAC
  		24 VDC
  		48 VDC
  		 
Operating voltage: 207-264 VAC
  		103-132 VAC
  		12-36 VDC
  		36-55 VDC
  		 
Rated current: 22 mA @ 230VAC
  		44 mA @ 115 VAC
  		140 mA @ 12 VDC
  		50 mA @ 36 VDC
  		 
Rated frequency: 48-62Hz   48 – 62 Hz   DC   DC    
Connection: Screw terminal   Screw terminal   Screw terminal   Screw terminal    
Connector size: 0.2 – 2.5 mm2
24 – 12 AWG   		0.2 – 2.5 mm2
24 – 12 AWG   		0.2 – 2.5 mm2
24 – 12 AWG   		0.2 – 2.5 mm2
24 – 12 AWG   		 


20 mA current loop
Electrical specification: 20 mA current loop
Data rate: -19200 bit/s
Connection: Screw terminal
Connector size: 0.2 – 2.5 mm2, 24 – 12 AWG


RS-232
Electrical specification: RS-232 V.24
Data rate: -19200 bit/s
Connection: 9-pos. D-sub female DCE and Screw terminal
Connector size: 0.2 – 2.5 mm2, 24 – 12 AWG


Isolation between interfaces
Power to all other 3000 V RMS @50 Hz and 60 s duration (MD-21 AC, MD-21 115 VAC).
Power to all other 1500 V RMS @50 Hz and 60 s duration (MD-21 DC, MD-21 36-55 VDC).
Line to Line 1500 V RMS @50 Hz and 60 s duration.


Standards
See Declaration of Conformity, DoC


Environmental
Temperature, operating: 5 to 50°C


Mechanical
Dimension (W x H x D): 55x100x128 mm
Weight: 0.4 kg
Mounting: DIN rail
Degree of protection: IP 20


 

A Beijer Electronics Group Company