Meilhaus Electronic ME-5100 cPCI, Manual, Page: 19 / 43

3.5 Frequency Input/Output
The concept of the „configurable subdevices“ of the ME-5000 se-
ries gives you the option of using individual subdevices with an al-
ternative functionality. The associated configuration is carried out
with the ME-iDC configuration tool before your application is called.
The following channels are available:

Frequency counter (FI = “Frequency Input”):
4 independent inputs for measuring the frequency and duty cy-
cle of rectangular signals (max. 5.5 MHz).

Pulse generator (FO = “Frequency Output”):
4 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_A0..3 and FO_B0..3 in the
terminal assignment on page 37. In this configuration, the remain-
ing inputs/outputs of the digital ports cannot be used.
Please note: In the “pulse generator” (FO) configuration, the un-
used pins DIO_B4..15 are connected to ground!
The specifications for the digital-I/O ports apply to the wiring of the
inputs and outputs. A reference to the PC ground (PC_GND) must
always be established. The maximum output current is I
OUT
= I
OL
=
I
OH
= 24 mA.
The frequency counters and pulse generators are configured by
software. Please read chapter 4.1.2 on page 25 for programming
the frequency input/output.