2364/4864 Terminal Board provides screw terminals for all 2364/4864 relay contacts and digital signals. Plugs into the 2364/4864 rear panel connector. Order as P/N 115750.
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.
