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4-4
Cabling and Wiring
Attaching an STA-U Screw Terminal Accessory
The screw terminals on the STA-U screw terminal accessory allow you to
connect field wiring to a DDA-08/16 board. The screw terminals are
labeled from 1 to 37 and correspond directly to the functions of the pins
on the main I/O connector on the board. For example, since pin 2 is
assigned to the external trigger, use screw terminal 2 to attach an external
trigger. Refer to Appendix B for a complete list of pin assignments.
To attach an STA-U to a DDA-08/16 board, connect one end of an S-1800
or C-1800 cable to the main I/O connector on the DDA-08/16 board and
the other end of the cable to either the J2 or J3 connector on the STA-U.
(The C-1800 is the unshielded version of the cable; the S-1800 is the
shielded version of the cable.)
Figure 4-3 illustrates the connection of an STA-U to a DDA-08/16 board.
Figure 4-3. Attaching an STA-U Screw Terminal Accessory
. . . . . . .
. . . . . . .
. . . . . . .
. . . . . . .
J2
Pin 1
Pin 1
STA-U
DDA-08/16 Board
J5
C-1800 / S-1800 Cable
J3
1
24
25
37
User-defined
circuitry
J1
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