Specifications
CAUTION
Please read this manual carefully! If equipment is used in any manner not specified in
this manual, the protection provided by the equipment may be impaired.
Digital I/O
Terminal Installation Category:
Standard:
Not Applicable.
CE:
Category 1.
Digital I/O Capability:
Dual Channels, each with five 8-bit ports, programmable as inputs or outputs.
Also included per channel are programmable handshake lines, data latching capability, a Service
Request (SRQ) input and Clear and Trigger outputs.
Logic Levels:
Outputs drive 2 TTL loads (3.2 mA). Optional 12, 24, 48 volt logic support available with
the HVCX1 High Voltage/Current Interface option.
High-Current Outputs:
With the HVCX1 option, the outputs can be configured, in groups of eight, as
high current outputs. Each high-current output is capable of sinking up to 200 mA at 50 VDC
maximum. Total current sinking capability is 8 A maximum.
Update Rate:
In binary mode, the Digital488/80A can update one 40-bit I/O channel at over 2 Kbytes per
second.
I/O Port Connections:
Two 50-pin male D-shell connectors. Mating solder tab connectors are supplied.
Input Ranges, Nominal Logic Low/High Voltages (
±
10%), and Input Resistances (HVCX1 option
only):
0-5 Volt Range
: 0.8 volts low / 2.4 volts high; 15 Kohms.
0-12 Volt Range
: 1.9 volts low / 5.75 volts high; 35 Kohms.
0-24 Volt Range
: 4.2 volts low / 11.5 volts high; 61 Kohms.
0-48 Volt Range
: 8.4 volts low / 23 volts high; 135 Kohms.
IEEE 488
CAUTION
The IEEE 488 terminal must only be used to control a non-isolated IEEE 488 system.
The common mode voltage (cable shell to earth) must be zero.
Terminal Installation Category:
Standard:
Not Applicable.
CE:
Category 1.
Implementation:
SH1, AH1, T4, TE8, L4, LE4, SR1, RL0, PP0, DC1, DT1, C0, E1.
Terminators:
Ignored on input. Selectable CR, LF, LF-CR or CR-LF, with or without EOI.
Programmable:
IEEE Bus Terminators, EOI Control, SRQ Mask, Port Data, Active Levels, Handshake
Lines, Format, and Configuration.
Connector:
Standard IEEE 488 connector with metric studs.
General
WARNING
Service: Fuse replacement and the changing of selected line voltage must be
performed by qualified service personnel. Never open the case while it is connected to
the AC line. Internal voltage potentials exist which could cause bodily injury or death.
Digital488/80A User’s Manual
Digital488/80A Overview 3
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