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DIGITAL I/O CARD–16
2. Introduction
2.1 Overview
The Digital I/O Card–16 provides 16 reed relays that can latch power, data, or
other electronic signals for control applications and 16 optically isolated inputs to
allow monitoring of off-board switch closures, relays, or for any other general-
purpose monitoring needs. The card is PCI 2.1 bus compliant. Addressing, data,
and control signals are TTL compatible.
2.2 What’s Included
The Digital I/O Card–16 is shipped with the following items. If any of these items
are missing or damaged, contact Black Box at 724-746-5500.
• Digital I/O Card–16
• Systems software (on a CD-ROM)
• This users’ manual
2.3 Technical Description
The Digital I/O Card–16 provides four parallel input/output (I/O) ports. The
ports are organized as ports A, B, C, and D. Ports A and B are input ports
interfaced to optically-isolated inputs, while ports C and D are reed relay output
ports. Assuming an I/O address of 300 Hex, Table 2-1 shows the port addresses.
Table 2-1. Port addresses.
Base Address
Hex
Decimal
Mode
Port A Address
300
768
Input Port (Opto-Input)
Port B Address
301
769
Input Port
Port C Address
302
770
Output Port (Reed Relays)
Port D Address
303
771
Output Port
