SERIES PMC440 PCI MEZZANINE CARD 32-CHANNEL ISOLATED DIGITAL INPUT MODULE
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for configuration and assembly instructions. Model PMC440 digital
input boards have no hardware jumpers or switches to configure.
CONNECTORS
Front Panel Field I/O Connector P1
The front panel connector P1 provides the field I/O interface
connections. The front panel connector is a SCSI-2 50-pin female
connector (AMP 787082-5 or equivalent) employing latch blocks and
30 micron gold in the mating area (per MIL-G-45204, Type II, Grade
C). Connects to Acromag termination panel 5025-552 from the front
panel via round shielded cable (Model 5028-187).
Front panel connector P1 pin assignments are shown in (Table
2.1).
Table 2.1: PMC440 Field I/O Pin Connections (P1)
Pin Description
Number
Pin Description
Number
IN00
1
IN16
21
IN01
2
IN17
22
P
IN02
3
P
IN18
23
O
IN03
4
O
IN19
24
R
NC
5
R
NC
25
T
IN04
6
T
IN20
26
IN05
7
IN21
27
0
IN06
8
2
IN22
28
IN07
9
IN23
29
COM0
10
COM2
30
IN08
11
IN24
31
IN09
12
IN25
32
P
IN10
13
P
IN26
33
O
IN11
14
O
IN27
34
R
NC
15
R
NC
35
T
IN12
16
T
IN28
36
IN13
17
IN29
37
1
IN14
18
3
IN30
38
IN15
19
IN31
39
COM1
20
COM3
40
No Connection
41
No Connection
42
No Connection
43
No Connection
44
No Connection
45
No Connection
46
No Connection
47
No Connection
48
No Connection
49
No Connection
50
Input channels are divided into four ports of eight channels
each. Channels of a port share a common signal connection with
each other. Isolation is provided between ports and between each
port and the PMC logic. With respect to interrupt generation and
events, event polarities may be defined as positive (low-to-high), or
negative (high-to-low) for individual nibbles (groups of 4 input lines,
or half ports). Change-of-State detection would require 2 input
channels--one detecting positive events, one detecting negative
events.
Note that the inputs of this device are bipolar, and may be
connected in any direction with respect to the port common.
Further, do not confuse port commons with signal ground. Refer to
Drawing 4501-869 for example input connections.
Noise and Grounding Considerations
Input lines of the PMC440 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/CPU 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.
PCI Local Bus Connector
The PMC440 module provides a 32-bit PCI interface to the
carrier via two 64 pin connectors. These connectors are 64-pin
female receptacle header (AMP 120527-1 or equivalent) which
mates to the male connector of the carrier/CPU board (AMP
120521-1 or equivalent). This provides excellent connection integrity
and utilizes gold-plating in the mating area. Threaded metric screws
and spacers are supplied with the PMC module to provide additional
stability for harsh environments (see Drawing 4501-859 for
assembly details). The pin assignments of the PCI local bus
connector are standard for all PMC modules according to the PCI
Mezzanine Card Specification (see Tables 2.2 and 2.3).
Table 2.2: PMC Connector Pin Assignments for J1 (32-bit PCI)
Signal Name
Pin #
Signal Name
Pin #
TCK
1
-12V
2
GND
3
INTA#
4
INTB#
5
INTC#
6
BUSMODE1#
7
+5V
8
INTD#
9
PCI-RSVD*
10
GND
11
PCI-RSVD*
12
CLK
13
GND
14
GND
15
GNT#
16
REQ#
17
+5V
18
V(I/O)
19
AD[31]
20
AD[28]
21
AD[27]
22
AD[25]
23
GND
24
GND
25
C/BE[3]#
26
AD[22]
27
AD[21]
28
AD[19]
29
+5V
30
V(I/O)
31
AD[17]
32
FRAME#
33
GND
34
GND
35
IRDY#
36
DEVSEL#
37
+5V
38
GND
39
LOCK#
40
SDONE#
41
SBO#
42
PAR
43
GND
44
V(I/O)
45
AD[15]
46
AD[12]
47
AD[11]
48
AD[09]
49
+5V
50
GND
51
C/BE[0]#
52
AD[06]
53
AD[05]
54
AD[04]
55
GND
56
V(I/O)
57
AD[03]
58
AD[02]
59
AD[01]
60
AD[00]
61
+5V
62
GND
63
REQ64#
64
# Indicates that the signal is active low.
