● Provides a user-definable, 128-line parallel interface with bit, byte, pulse, string and binary data transfer capabilities. Fully configurable to the user's needs by bus commands. ● High-current drivers and input pullup resistors. Drives more devices, longer lines and inputs CMOS signals or switch contacts. ● Two companion Relay Driver Boards drive 5-48 volt relays. Boosts drive signals to control larger relays and solenoids. ● Companion expansion board adds another 128 I/O lines. Expanded configuration provides 256 I/O lines. ● Device configuration, user's IDN message and bus address stored in Flash. User can easily customize the 4813 configuration as part of his system. ● New Pulse Commands. Extends the 4813 to control latching relays and other pulse applications.
The Model 4813 GPIB <-> Digital Interface Board is an IEEE-488.2/GPIB to digital interface with 128 I/O lines that can be used to easily adapt devices with a large number of digital signals to the IEEE-488/GPIB/HP-IP bus. In a typical application, the ICS Digital Interface Board 4813 is located inside a device or test chassis and is powered by the device's +5 volt power. All digital signal connections are on a 150-pin connector at one end of the card. A 26-pin header on the other end of the ICS Digital Interface Board 4813 contains the GPIB and address switch input signals. It connects to a companion GPIB Connector/Address Switch Board that mounts on the rear panel of the chassis.
The ICS Digital Interface Board 4813's high-power TTL type signals can easily drive small relays or other logic elements. Applications include controlling switching matrices, displays or large signal arrays. Use with a ICS Digital Interface Board 4813 Relay Driver Board to drive high current or high-voltage relays. An Expansion Board adds an additional 128 lines letting the user control up to 256 I/O lines from the GPIB bus.
Dual primary addresses or single primary with secondary addresses 0 and 1 for transparent data transfer.
SRQ Generation
SRQs are generated if the unit is not a talker, if SRQs are enabled and if an Enabled Event Status Register bit or if a monitored digital input change occurs. Digital inputs monitored by the Questionable registers.
Used to set and query all programmable functions. The 4813 conforms to SCPI 1994.0 Specification.
Interface Specifications
Signal Characteristics
The 4813's parallel I/O signals have the following electrical characteristics. All time delays listed here are maximums, all pulse widths are minimums.
Inputs
128 Digital I/O lines (256 lines with expansion Bd), 2 Status and Reset Inputs
Input Logic Levels
High = > +2.0 V @ ±10 μA
Low = <0.8 V @ 250 μA
with 33 KΩ pullup to +5 VDC for sensing contacts.
Max high input = 5.5 V
Input Timing
External Data Inhibit line SETS within 1 μs of the active edge of the EDR Input signal and resets after data is loaded. Data loading time for 6 BCD/HEX characters is 0.15 ms (typ.) after the 4813 has been addressed as a Talker
Output Logic Levels
High = >3 V with 3 mA source
High =>2 V with 24 mA source
Low = 0.0 to +0.55 Vdc, 48 mA sink
Output Timing
Data is transferred to the output 0.6 to 8 ms after receipt of a terminator depending upon transfer method and command.
Pulse Widt
10 to 30000 ms in 10 ms steps
50 ms default
Data Stb
Output pulse width, 2-5 μs
Trigger
Output pulse width, 5 μs
Remote
Output level asserted when in the remote state
Reset
Output pulse width, 270 μs for when 4813 reset.
Reset Inputs
The 4813 is reset by a low going pulse on the External Reset input line or by pressing a miniature push-button on front edge of the 4813's PCB.
