Acromag 948 Series, User Manual

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AVME948x USER'S MANUAL Digital I/O Board
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Table 2.2 Jumper Descriptions
Jumper Function As Shipped
J8
(Ports N+O & N+1 reference voltage).
When in place, sets thresholds for
input to +1V and +2.2V (TTL) low and
high, respectively. Remove J8 to
establish reference off card.
Jumper in
place
J7
(Ports N+0 & N+1 pullup voltage
jumper). When in place, pulls the I/O
lines to +5V through the optional
pullup networks.
Jumper in
place
J6
(Ports N+2 & N+3 reference voltage).
When in place, sets thresholds for
input to +1V and +2.2V (TTL) low and
high, respectively. Remove J6 to
establish reference off card.
Jumper in
place
J5
(Ports N+2 & N+3 pullup voltage
jumper). When in place, pulls the I/O
lines to +5V through the optional
pullup networks.
Jumper in
place
J2
(Ports N+4 & N+5 reference voltage).
When in place, sets thresholds for
input to +1V and +2.2V (TTL) low and
high, respectively. Remove J2 to
establish reference off card.
Jumper in
place
J1
(Ports N+4 & N+5 pullup voltage
jumper). When in place, pulls the I/O
lines to +5V through the optional
pullup networks
Jumper in
place
J4
(Ports N+6 & N+7 reference voltage).
When in place, sets thresholds for
input to +1V and +2.2V (TTL) low and
high, respectively. Remove J4 to
establish reference off card.
Jumper in
place
J3
(Ports N+6 & N+7 pullup voltage
jumper). When in place, pulls the I/O
lines to +5V through the optional
pullup networks.
Jumper in
place
J16 Port N+0 output driver enable J9-J16 ** are
J9 Port N+1 output driver enable made with a
J15 Port N+2 output driver enable thin trace on
J10 Port N+3 output driver enable the solder side.
J14 Port N+4 output driver enable Cutting jumper
J11 Port N+5 output driver enable will disable
J13 Port N+6 output driver enable the outputs of
J12 Port N+7 output driver enable that group.
J18
DTACK* Timer Jumper - This jumper
is preset at the factory and should not
be reprogrammed by the user. Factory
programmed
J20 SYSFAIL* Jumper - This asserts
SYSFAIL* after power up or reset. Jumper in
Place
** J9-J16 are used only in cases where it is absolutely necessary to
have outputs disabled through the hardware. See
Programming Considerations (Section 3) for instruction on
software enabling/ disabling of outputs.
Input Threshold Adjustment
Different input thresholds may be established by connecting
REF to a voltage other than +5V. When this is done, the input
hysteresis still remains at approximately 1.2 volts. The new high and
low thresholds are defined by the following equations:
V
LOW
= (0.448 x REF)- 1.22;
V
HIGH
= (0.448 x REF) + 0.025;
2.75
≤
REF
≤
27.5 Volts
I/O CONNECTIONS
On Model AVME 9481, the 64 I/O points are accessible through
a 96-pin DIN 41612 connector labeled P2. I/O adapter card Models
9921-16 or 9921-32 are used to interface between P2 and the ribbon
cables (see Drawings 4500-788 & 4500-789). These adapters
mount to the back of a VME cage to provide the mating socket for
P2. Refer to Table 2.3 and the termination panel connection
diagrams 4500-790 and 4500-791.
On Model AVME 9480, two 50-pin ribbon cable connectors on
the front panel are used to access the 64 I/O points (P3 and P4).
I/O adapter card Models 9920-16 or 9920-32 are used to interface
between P3 & P4 and the ribbon cables (see Drawings 4500-786
and 4500-787). Refer to Table 2.3 and the termination panel
connection diagrams 4500-785 and 4500-792.
CAUTION: DO NOT PLUG P2 INTO ANY BACKPLANES IN
A CARD CAGE!
Table 2.3A: I/O Connectors P2,P3
Functions P2 Pin # P3 Pin #
Port N+0, I/O Bit 7 B25 33
Bit 6 B26 35
Bit 5 B27 37
Bit 4 B28 39
Bit 3 B29 41
Bit 2 B30 43
Bit 1 B31 45
Bit 0 B32 47
Port N+1, I/O Bit 7 B17 34
Bit 6 B18 36
Bit 5 B19 38
Bit 4 B20 40
Bit 3 B21 42
Bit 2 B22 44
Bit 1 B23 46
Bit 0 B24 48
+5V B9 1,49
GND B13,B14 9,11
GND B15,B16 13,15
REF Ports 0 & 1 B12 7
Pullup Ports 0 & 1 B11 5
Protect Ports 0 & 1 B10 3
Port N+2, I/O Bit 7 A25 17
Bit 6 A26 19
Bit 5 A27 21
Bit 4 A28 23
Bit 3 A29 25
Bit 2 A30 27
Bit 1 A31 29
Bit 0 A32 31
Port N+3, I/O Bit 7 A17 18
Bit 6 A18 20
Bit 5 A19 22
Bit 4 A20 24
Bit 3 A21 26
Bit 2 A22 28
Bit 1 A23 30
Bit 0 A24 32
+5V B1 2,50
GND B5,B6 10,12
GND B7,B8 14,16
REF Ports 2 & 3 B4 8
Pullup Ports 2 & 3 B3 6
Protect Ports 2 & 3 B2 4
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