Asynchrone Modems for Baseband- Transmission

12455101245511

Overview

Westermo’s short haul modem MA-12 and MA19 is used for data communication over long distances and in harsh environments. The MA-12 and MA19 is used to connect equipment with RS-232/V.24 interfaces. Westermo's ±10 mA balanced current loop (W1) transmission technique makes it possible to transmit data up to 18 km at low data rates. At shorter ranges transmission rates up to 38.4 kbit/s can be achieved. All Westermo’s modems using the ±10 mA current loop (W1) technique are compatible with each other. The MA-19 should be fitted into the Westermo RV-01 rack system.

  • Use this unit when the transmission
  • distance is greater than 15 metres
  • RS-232/V.24 interface
  • Protects connected units from lightning/transients
  • Units provide totally transparent data communications
  • Very low delay time through units
  • Units can transmit a single status signal
  • Used to connect equipment on different earth potentials
  • Guarantees reliable long-distance communication

Technical Data MA-12

Power
MA-12 AC  MA-12 DC  MA-12
36-55VDC 
Rated voltage: 115/230 VAC   24 VDC   48 VDC  
Operating voltage: 103-132 VAC
207-264 VAC  
12-36 VDC
 
36-55 VDC
 
Rated current: 24 mA @ 115 VAC
12 mA @ 230 VDC
 
170 mA @ 12 VDC
 
60 mA @ 36 VDC
 
Rated frequency: 48 – 62 Hz   DC   DC  
Connection: Power inlet   Screw terminal   Screw terminal  
Connector size: -   0.2 – 2.5 mm2
24 – 12 AWG  
0.2 – 2.5 mm2
24 – 12 AWG  


W1
Electrical specification: Westermo 10 mA balanced current loop
Data rate: – 38400 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: – 38400 bit/s
Connection: 25-pos. D-sub female DCE


Isolation between interfaces
Power to all other 3000 V RMS @50 Hz and 60 s duration (MA-12 AC).
Power to all other 1500 V RMS @50 Hz and 60 s duration (MA-12 DC).
Power to all other 1500 V RMS @50 Hz and 60 s duration (MA-12 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): 161x53x139 mm
Weight: 0.5 kg
Mounting: Table top
Degree of protection: IP 20

Technical Data MA-19

Power
MA-19 
Rated voltage: 115/230 VAC  
Operating voltage: 103-132 VAC
207-264 VAC  
Rated current: 30 mA @
115 VAC
 
Rated frequency: 48-62 Hz  
Connection: PS-02  
Connector size: -  


W1
Electrical specification: Westermo 10 mA balanced current loop
Data rate: – 38400 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: – 38400 bit/s
Connection: 25-pos. D-sub female DCE


Isolation between interfaces
Power to all other 3000 V RMS @50 Hz and 60 s duration (MA-19 via PS-2).
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): 100x100 mm
Weight: 0.1 kg
Mounting: Rack
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