SERIES AP445 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 14 - http://www.acromag.com
- 14 -
www.acromag.com
loopback interconnection (see Figure 3 in Appendix A)
2.5 Noise and Earth Grounding Considerations
Output lines of the AP445 are isolated between the logic and field I/O
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
earth ground loops.
2.6 Logic Interface Connector
The AP module logic 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).
Threaded metric M2.5 screws and spacers are supplied with the AP module
carriers and conduction cooling kit to provide additional stability for harsh
environments.
Power su5V, +12V, and -12V 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.
Table 2.2: Logic Interface
Connections
Pin #
Name
Pin #
Name
51
+5V
1,2
52
+3.3V
3
49
+12V
1,2
50
GND
47
-12V
1,2
48
N.C. (+1.5V)
1
45
Present
4
46
N.C. (LED_WPAN#)
1
43
GND
44
N.C. (LED_WLAN#)
1
41
+3.3V
3
42
N.C. (LED_WWAN#)
1
39
+3.3V
3
40
GND
37
GND
38
N.C. (USB_D+)
1
35
GND
36
N.C. (USB_D-)
1
33
PETp0
34
GND
31
PETn0
32
SMB_DATA
29
GND
30
SMB_CLK
27
GND
28
N.C. (+1.5V)
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