Impulse 463N - Manual (Page 19)

©Sealevel Systems, Inc.
SL9049 - 11/2010
SeaI/O Manual 19
Perfect for driving industry-standard solid-state relay (SSR) racks, the SeaI/O-462 provides 96
bits of buffered drive TTL I/O. Each DB-78 connector brings out 48 I/O bits addressable as six,
eight-bit ports. For easy connection to relay racks, Sealevel offers a six-foot cable (Part#
CA237) that terminates each DB-78 connector to two industry standard 50-pin IDC connectors.
Order part number 462x-KT and receive two CA237 cables with each unit.
The SeaI/O-462 uses 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.
Power Requirements
Max Output Power +5VDC @ 1A (5W)
Inputs
Logic High Max 0.8VDC
Logic Low Min 2VDC
Outputs
Logic High Max 0.5VDC @ 64mA
Logic Low Min 2VDC @ 32mA
The SeaI/O-462 modules are designed to work with industry standard solid-state relay racks
that expect negative logic to operate. The SeaI/O-462 modules expect negative logic on the
inputs.