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 k
Ω
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
