IDO-xx
Isolated Digital Output Card
FEATURES
- Individually-isolated
digital outputs for up to three 16-bit groups
- All
solid-state design permits higher throughput than possible
with electromechanical relays
- Load
voltages up to 60 Volts
- On-Card
shields prevent accidental contact with user voltages
- Outputs
at zero volts at power turn-on and computer reset
- Output
connectors via on-card ribbon-cable headers
- Lower
cost per point than externally-racked solid-state relay
modules
FUNCTIONAL
DESCRIPTION
IDO-xx
Series cards provide 16, 32, or 48 opto-isolated differential
outputs and plug into expansion slots of IBM PC/XT/AT or compatible
computers. Solid-state, P-Channel FET switches are used as
the output elements and provide both greater reliability and
much faster turn-on and turn-off time than is possible with
electromechanical relays. User-supplied load voltages can
be from 5V to 60V. Output connections are via 50-wire ribbon
cables that mate with headers on the card. A strain relief
bar where the cables exit the card assures that the cables
will not interfere with adjacent cards. Standard cables are
six feet long but alternate lengths are available. Model STA-50
Screw Terminal Accessory cards, one per each 16 bits, can
be used to provide easy connection to your system.
The
card uses six bytes of I/O Bus address; one byte for each
eight bits of output. Outputs of a programmable array logic
chip enable data bytes to be clocked into latches. Outputs
of the latches, in turn, are connected via opto-couplers to
the output P-channel FET drivers. The opto-couplers used are
rated to 5 KV and on-card isolation channel-to-channel and
channel-to-computer exceeds 60 Vrms. The P-Channel FET drivers
are capable of 1 Ampere steady-state current (Note: Current
output may be limited by the cable to as little as 0.5A).
Diodes are included across the load for inductive-spike protection.
There
are 48-bit, 32-bit, and 16-bit versions. The latter two models
are de-populated versions of the 48-bit card.
Each
bit of the IDO card is optically-isolated from the output
driver which switches the supply voltage to the output pin.
The negative connection is made on the return pin and each
output is isolated from every other output.
When
the opto-isolator is ON, the FET is activated by the Zener-diode-limited
supply voltage. When the FET is ON, the full Supply voltage
is available at the output pin. When the opto-isolator is
deactivated, the FET opens and the output drops to the return
line voltage level.
Note,
because high voltages can be present, a protective cover
is included and cables plugged into the headers on the card
extend through this cover and exit the card through a cutout
in the mounting bracket. (A strain-relief bar is also provided
at that exit point.) If there is the possibility that some
other card in your system will have sharp trimmed component
leads that could pierce the cable(s), then you can use shielded
"Zippertubing" (our part number ZTR-xx) to protect the cable
and prevent possible short circuits.
SPECIFICATIONS
Digital
Outputs
- Number
of Channels: 16, 32, or 48
- Load
Voltage Range: 5V to 60V (Voltage supplied by User)
- Load
Current per Channel: 1 Ampere max. steady state, 2A pulse.
(Note: Current may be limited by the cable. Certain ribbon
cables limit current to 0.5 A.)
- Isolation:
On-Card: 60V rms, channel-to-channel and channel-to-computer
Cable: 300 Vrms is typical ribbon-cable dielectric strength
- Switching
Time:
Turn-On: 50 µsec
Turn-Off: 2 µsec, inductive-spike protection via a diode
- Switch
Resistance: 0.4 ohms when saturated
- Switch
Leakage Current: 1 uA
Environmental
- Operating
Temperature: 0 to +60 degree C.
- Storage
Temperature: -20 to +100 degree C.
- Humidity:
5% to 95% non condensing.
- Size:
13.310 inches. Install in a full-size slot.
Power
Requirements
- +5
VDC at 540 mA typical for fully populated 48 bit card
Regulatory
Compliance 
Declaration of Conformity, and Test Reports are on file. Users
must use appropriate shielded cables.
| Part
Number |
Price(USD)
|
| IDO-16 |
157.00
|
| IDO-32 |
249.00
|
| IDO-48 |
349.00
|
View / Download Manual (in .PDF
format)
