3.3.1 Opto-Isolated Inputs
The ME-5004 has 16 opto-isolated inputs which have been de-
signed for an input high-level U
in,H
typ. 24
V. A reference to the
ground of the external circuitry via GND_EXT (pins 15) has to be
setup in any case. The input lines show logic “0” if not connected.
The opto-isolated digital-inputs of the ME-5004 are protected from
over-voltages with special Z-diodes, so called Transient Voltage
Suppressor diodes (TVS diodes). These diodes can discharge short
voltage pulses with URWM (Reverse Working Maximum) greater
than 30
V to ground (max. 600
W pulse power at a pulse width of
1
ms).
3.3.2 Opto-Isolated Outputs
The ME-5004 has 16 opto-isolated outputs. The output port is
equipped with special driver chips that allow a selection of sink and
source via software. Depending on the application, the user can
switch between low-active outputs (sink driver = standard setting)
and high-active outputs (source driver) via software. Moreover, the
outputs can be set to high impedance port-wise. A reference to
the ground of the external wiring via GND_DO (pin 21) has to be
setup in any case.
Summary of Contents for ME-5004
Page 12: ......
