Impulse 520W - Manual (Page 68)

I/O Wiring – SeaI/O-462 and 463 Modules
The SeaI/O-462 and SeaI/O-463 use 74ABT245 octal bi-directional transceivers to
provide TTL input/output capabilities and can sink 64mA and source 32mA. Each
bit is pulled to +5V through a 10K ohm pull-up resistor to insure each bit is at a
known state when not driven. The maximum output power is +5V @ 1A (5W).
SeaI/O-462 DB-78F Connectors
The SeaI/O-462’s 96 digital I/O channels are brought out to two DB-78 Female
connectors on the front of the enclosure (pinout shown below). Each connector
provides 48 bits of digital I/O divided into six eight-bit ports. Each port may be
individually configured via software command as an input or an output.
Bits 1-48
Bits A1 B1 C1 A2 B2 C2
D0 75 38 18 10 30 2
D1 76 37 17 9 29 1
D2 77 36 16 8 28 22
D3 78 35 15 7 27 21
D4 59 34 14 6 26 40
D5 39 33 13 5 25 60
D6 20 32 12 4 24 61
D7 19 31 11 3 23 62
Bits 49-96
Bits A3 B3 C3 A4 B4 C4
D0 75 38 18 10 30 2
D1 76 37 17 9 29 1
D2 77 36 16 8 28 22
D3 78 35 15 7 27 21
D4 59 34 14 6 26 40
D5 39 33 13 5 25 60
D6 20 32 12 4 24 61
D7 19 31 11 3 23 62
Power & Commons
+5V 63, 74
Commons 41 – 58, 64 – 73
© Sealevel Systems, Inc. - 65 - SeaI/O User Manual