3.4.3 Bidirectional TTL-Ports
All PCI-Express models as well as PCI and cPCI models with
hardware revision 3.0 and higher provide two TTL-ports with 8 bits
each. Each port can be configured independently as input or
output. After power up, all ports are set to input. For more
information about programming refer to chapter 4.2 "Digital-I/O
Section" on page 23.
Both ports C and D are available by the 25-pin D-sub female
connector ST2. With the PCI-, PCI-Express- and CompactPCI-
models the additional mounting bracket ME-AK-D25F/S is required
(see pinout on page 28).
It is important that the voltage levels of the digital input/output
wiring is within the TTL-level-limits (see specifications on page 25)
and that a reference to PC ground (PC_GND) is made.
The maximum output current is I
Out
= I
OL
= I
OH
= 10 mA.
Summary of Contents for ME-630 Series
Page 13: ......
