PCI-20378W Overview

These Digital I/O boards interface with the expansion bus on an ISA computer. They can be used to interface to other TTL-level equipment, as well as to monitor and/or control devices that have discrete on/off states, such as relays, lamps and motors. The PCI-20378W-1 has 30 eight-bit wide ports and provides 240 channels of buffered TTL I/O, and the PCI-20378W-3 has 15 ports and provides 120 channels. You can program each 8-bit port independently via software for use as either an input or an output port.

Features & Benefits

120 or 240 Digital I/O Channels with TTL-Compatible levels
Programmable as Inputs or Outputs in 8-Bit Ports
Software Programmable, No Jumpers
High Current-Sink (24mA) and Source (15mA) Capability
Synchronization/Handshaking Capability

PCI-20378W Hardware Specifications

Parameter	Conditions	Specifications
Digital I/O
Number of Ports*	PCI-20378W-1 (8 channels bits each) PCI-20378W-3 (8 channels (bits) each)	30 ports (240 channels) 15 ports (120 channels)
Input Levels		TTL
Output Levels	Initialized as inputs	TTL
Output Current Source Current Sink Current	Vout=high Vout=low	15mA 24mA
System Throughput (Hardware Only)
Digital I/O		400 kBytes/second
Interrupts
Type		Latched
Sources	PCI-20378W-1 PCI-20378W-3	Up to 6 Up to 4
PC Levels	PCI-20378W-1 PCI-20378W-3	2 through 7 2 through 7
Physical Characteristics
Power Requirements	PCI-20378W-1, Vin = +5V PCI-20378W-3, Vin = +5V	3.65 A maximum 2.14 A maximum
Size	Length x Height	13.4" x 4.5" (40.0cm x 11.4cm)
Operating Temperature Range		0 to 70° C
* All digital I/O ports are programmable as either inputs or outputs. ** Total for all channels cannot exceed 3.0A per board.