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SERIES AP441 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 14 -
http://www.acromag.com
- 14 -
www.acromag.com
AP445 output module are normally not connected together for loopback
interconnection of the AP441 and AP445 (see Figure 2 in Appendix A).
2.5 Noise and Earth Grounding Considerations
Input lines of the AP441 are optically isolated between the logic and field
input connections. Likewise, separate port commons facilitate port-to-port
isolation. Consequently, the field I/O connections are isolated from the
carrier board and backplane, thus minimizing the negative effects of ground
bounce, impedance drops, and switching transients. However, care should
be taken in designing installations to avoid inadvertent isolation bridges,
noise pickup, isolation voltage clearance violations, equipment failure, or
ground loops.
2.6 Logic Interface Connector
The AP module logic card edge connector interfaces to the mating
connector on the carrier board. The pin assignments of this connector are
standard for all AP modules according to the PCI Express MINI Card
Electromechanical Specification, REV 1.2 (with exceptions shown in Table
2.2 and noted below).
Power su5, +12, and -12 Volt have been assigned to pins that are
reserved in the mini-PCIe specification. The ‘Present’ signal is grounded on
the AP module. In addition, COEX1, COEX2 – wireless transmitter control
are reassigned to JTAG signals TMS and TCK. Lastly, UIM_C4, UIM_C8 –
reserved User Identity Module signals are reassigned to JTAG signals TDI and
TDO.