Rev. 1.1E
Manual ME-5001
Hardware
Page 18
Meilhaus Electronic
3.3.1
Digital Inputs
When wiring the inputs, note that the voltage level must be observed (see
the specifications on page 29) and that a reference to the PC ground
(GND_PC) must be established (see diagram 4).
3.3.2
Digital Outputs
When wiring the outputs, note that the voltage level must be observed
(see the specifications on page 29) and that a reference to the PC ground
(GND_PC) must be established (see diagram 4).
I
Out
= I
OL
= I
OH
= 24 mA per pin.
3.3.3
External Trigger
On the ME-5001 no external trigger inputs are available. However you
can monitor the bit-pattern of a digital input port. As soon as the
specified event occurs, an interrupt can be issued and passed directly to
the PC. See chapter 4.2 on page 27.
3.4
Frequency Input/Output
The concept of the "configurable subdevices" of the ME-5000 series
gives you the option of using individual subdevices with an alternative
functionality. The associated configuration is carried out with the
ME-iDC configuration tool before your application is called.
The following channels are available:
•
Frequency measurement
(FI= "Frequency Input"):
8 independent inputs for measuring the frequency and duty cycle of
rectangular signals (max. 5.5 MHz).
•
Pulse generator
(FO= "Frequency Output"):
8 independent outputs for the output of a periodic rectangular signal
at up to 5.5 MHz with a variable duty cycle.
The associated pins are identified as FI_0..7 and FO_0..7 in the terminal
assignment on page 11. After powering up, the pins FO_0..7 are configu-
red as inputs i. e. in high impedance state. Not until the driver has been
loaded driver become conductive.
