Specifications are subject to change without notice.
IOtech 652u & 655u User’s Manual
978090
Specifications 7.a-5
Tachometer Inputs
Any analog input channel may be used as a tachometer input.
Digital I/O Lines
Note
: To make use of Digital I/O, eZ-TOMAS or eZ-NDT software must be running in the host PC.
Channels
: 8 Digital I/O, programmable as inputs or outputs on a line by line basis
Ports
: 1 x 8-bit, Each bit is programmable as input or
output
Power-up mode
:
Inputs pulled low
Connector
: DB-9 female (
figure
)
Input Modes
: 2 programmable input modes: (1) asynchronous, under program control at any time relative
to analog scanning; (2) synchronous with analog scanning
Input Protection:
-0.6V and +5.6V
Input Levels:
Low: 0 to +0.8V
High: +2.0V to +5.0V
Input pull-down resistor
: 10k
Ω
Synchronous Sampling
:
105,468Hz, maximum
Output voltage range
: 0 to +3.3V, may be pulled up to +5V
Output resistance
: 100
Ω
Output Levels:
Low: < 0.8V
High: >3.0V with no load
Note
: A Digital I/O example is located in section 7.b.
Figure 13. Digital I/O I-V Curve
Output timing
: Outputs are always written asynchronously.
DB9 –
As viewed from the rear panel.
Digital I/O
Channel
Numbers
