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PLUG-IN CARDS

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GENERAL PAGE

Model 10BIO-16
Universal Logic Input/Output Card

This card allows a System 10 "B-sized" mainframe to perform automatic safety monitoring and other programmed logic control functions in connection with controlled tests and processes.

The 10BIO-16 provides sixteen optically isolated LOGIC I/O PORTS, each of which can be designated as either input or output, in any desired mix.  For "A-sized" mainframes, you will use the Model 10AIO-16 Universal Logic I/O Card, which is functionally equivalent to the 10BIO-16.  General I/O Specifications, along with typical logic connections, are given in the table below.

Once initialized via the B SLOT (BSL) command, an installed Model 10BIO-16 establishes a one-to-one correspondence between its own sixteen logic I/O ports and the sixteen members of any selected system "bit group" (every System 10's DIGITAL DATABASE has registers for 1000 internal logic bits, which are divided into "bit groups" of 16 bits each: Bit Nos. 0 through 15 = Bit Group No. 1; Bit Nos. 16 through 31 = Bit Group No. 2; etc.).  Click here for a table of "Some Bit-Related Mnemonic Commands"—including the bit-sourcing and bit-setting commands mentioned below.

The card's I/O ports will then reflect at all times the existing logic states of the corresponding system bits.  The state of any given bit will be determined in turn by one (only) of several different "logic sources," which include

	system "LIMIT LOGIC"
	a logic input received by the Model 10BIO-16 (or 10AIO-16) at the corresponding port
	an externally applied bit-setting command (BIT, BIN, BCD, or HEX)
	a "special bit" assignment via a command such as TIMEOUT (TMO), COMPUTER STATUS BIT (CSB), or PERIPHERAL STATUS BIT (PSB)
	assignment to a system "COPROCESSOR" card

The LOGIC SOURCE (SRC) command is used to designate all logic inputs.  If this command is not applied to a given 10BIO-16 port, the system will assume it to be an output.  The SRC command will also specify whether associated logic bits will be latching or nonlatching.

Thus, for example, the 10BIO-16 lets a host computer directly read or set individual logic inputs or outputs, respectively—in accordance, say, with calculations performed by the computer itself.  At the same time, certain 10BIO-16 outputs can be made to reflect—instantly and automatically, without further attention from the computer—any specified violations of preset limit values occurring in any specified data channel or group of channels.  

The following diagram summarizes the correspondence of LOGIC I/O PORTS and SYSTEM BITS.  Here, Bit Group No. 3 (Bits 32 through 47) has been assigned to the sixteen I/O ports of the 10BIO-16 card occupying B Slot No. 4 (via the BSL command).

By means of special "CONVERSION CHANNELS," the Model 10BIO-16 permits the system to handle BINARY and BINARY CODED DECIMAL (BCD) inputs and outputs.  Thus, 

A binary or BDC input can be read as a decimal value

A binary or BCD output can be issued by the 10BIO-16 to represent a fixed decimal value

A binary or BCD output can be issued to represent the current reading of a specified data channel

The Model 10BIO-16 accepts logic inputs directly from dry contacts (switches, relays, etc.).  Inputs and outputs are compatible with TTL and other solid-state logic systems (see Specifications).

In addition, the 10BIO-16 is electrically compatible with many popular plug-in "logic modules" for power control switching.  In fact, it is fully plug-compatible with the standard ribbon cable used for the sixteen-channel power boards on which these various I/O modules can be mounted.

Equipped with one or more Model 10BIO-16 cards, a System 10 mainframe can

	read pressure switches, mechanical limit switches, AC or DC power terminals, relays, photocell detectors, operator push-buttons, and similar logic-input sources
	actuate solenoid valves, illuminate panel displays, sound alarms, start and stop motors or pumps, initiate and control safety shut-down sequences
	perform many other automation tasks that require "intelligent" switching, even of substantial amounts of power

The intelligence required for these functions can be very simple or very complex—and, depending on application requirements, it can reside in the system Central Processor alone, or in the programming of the (optional) host computer.