Magic 485F Adapter Page 9
3 TECHNICAL SPECIFICATION
The technical characteristics of the Magic 485F Adapter are in accordance with the following
electrical and physical specifications.
Except where otherwise noted, all specifications are typical at 25º C
Electrical Specification
Supply Voltage +5.0 VDC to +12.0 VDC
from external supply via terminal strip
Supply Current 50 mA plus current drawn by output loads
100 mA fully loaded
RS232 'High' signal input +2.4 to +30 V
RS232 'Low' signal input –30 to +0.8 V
RS232 Input Resistance 5 kΩ
RS232 'High' signal output +9 V
RS232 'Low' signal output –9 V
RS232 Output Resistance 300 Ω
RS422/485 Input sensitivity 0.2 V
RS422/485 Input Hysteresis 70 mV
RS422/485 Output drive 1.5 V minimum, fully loaded
RS422/485 Output load 27 Ω minimum
RS422/485 Receiver I/P Termination 120 Ω resistor across differential input terminals.
Can be disconnected by switching SW1-4
Data Rate 120 kBd max
RS232 Connector 25 way DB-25 female connector with screw-locks
RS422/485 Connector 8 way pluggable screw terminal assembly
Physical/Environmental Specification
Module with connector Packed
Size 67 x 53 x 20 mm 215 x180 x 80 mm
Weight 60 gm 250 gm
Temperature Range Operating Storage
0° C to +60° C -20 to +70° C
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