Serial Ports 475
Serial Port Jumpers
The following Jumper selections for proper operation of the Rev D serial communication card.
Jumper Settings
Location Designation Description
J3 AMD Port A Multidrop .
J2 BMD Port B Multidrop
J6 AHST Port A Host
J5 BHST Port B Host
J8 ATR Port A Termination Resistor
J7 BTR Port B Termination Resistor
J9 RS-232 / RS-422 RS-232 / RS-422 selection jumper
J10 RS-232 / RS-422 RS-232 / RS-422 selection jumper
Definitions
Multi-drop Used to enable / disable the multi-drop feature for communication to
multiple controls through one link program..
Host Used to configure the card as a host serial card for multi-drop. Requires
additional Hardware.
Termination Resistor The Termination Resistor is used to add resistance to the communications
system for the end controls in a multi-drop system.
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