Data General Dasher D461 User Manual page 35

4. Connect the communication cabling between the host or modem
and the rear of the display unit. Secure the display-unit
connection with the two screws provided with the 25-pin Cannon
connector that plugs into the rear of the display unit.
NOTE: The installation data sheets provide detailed
cabling information for the D411/D461 terminals. In
addition, Figure 2-3 shows the terminal interface for the
standard EIA RS-232-C cables, modem cables, and printer/
mouse/digitizer-port cables. When not using a Data
General EIA cable for an EIA connection, wire the terminal
end of the 25-pin connector as shown in Figure
2-4.
Note
that Data General cables are all shielded and that shielded
cables must be used to comply with FCC, Part 15. Figure
2-5 shows how shielded cables must be terminated. Figure
2-6 shows the 20-mA current-loop cables from Data
General. Data General 20-mA current-loop cables are all
wired for a passive connection in which the host system
supplies the power to drive the terminal interface. When a
Data General current-loop cable is not used for a 20-mA
current-loop connection, wire the 25-pin Cannon connector
for a passive connection. For 20-mA current-loop cabling, a
two-twist ed-pair, low-capacitance shielded cable is required.
Contact Data General Field Engineering for approved cable
vendors.
Installation and Maintenance 2-5