User`s manual

VXI Technology, Inc.
20 EX7000-OEM Basic Operation
Please note that Figure 3-1 depicts the EX7000-OEM mounted in an optional, single-high stacking
frame. Additional sections can be added for up to eight relay driver boards stacked on top of the
digital controller board.
Trigger Bus Connectors
The EX7000-OEM provides an LXI compatible trigger bus connector. For more information on
the LXI Trigger Bus and creating an appropriate cable, please visit
www.lxistandard.org and refer
to LXI Standard Revision 1.1 and LXI Trigger Bus Cable and Terminator Specifications Rev 1.1.
Trigger Bus Connectors
Pin Signal Pin Signal
1
+3.3 V
14
RP_TRIG_P0
2
GND
15
RP_TRIG_N0
3
RP_TRIG_P1
16
RESERVED
4
RP_TRIG_N1
17
RP_TRIG_P2
5
GND
18
RP_TRIG_N2
6
RP_TRIG_P3
19
GND
7
RP_TRIG_N3
20
RP_TRIG_P4
8
GND
21
RP_TRIG_N4
9
RP_TRIG_P5
22
GND
10
RP_TRIG_N5
23
RP_TRIG_P6
11
RESERVED
24
RP_TRIG_N6
12
RP_TRIG_P7
25
RESERVED
13
RP_TRIG_N7
25
13
14
1
Digital I/O Connector
The EX7000-OEM features an 8-channel digital I/O port on the rear panel of the instrument. This
port can be used as an arm/trigger source, for presentation of limit evaluation information, and as a
general purpose output device. The digital I/O connector is a standard DB-9 with the following pin
assignment:
Digital IO Connector
Pin Signal Pin Signal
1
DIO Channel 0
2
DIO Channel 1
3
DIO Channel 2
4
DIO Channel 3
5
DIO Channel 4
6
DIO Channel 5
7
DIO Channel 6
8
DIO Channel 7
9
GND
9
5
6
1
Mating Connector: Tyco 5-747904-2
As a general purpose output device, each DIO channel can be independently programmed with
regards to its output functionality and its static level to assume when enabled as an output. When
not enabled as an output, a channel becomes tri-stated, preventing conflict with other potential
voltage drivers. Reference the port’s electrical specifications in
Table 3-1 for voltage tolerance
limits and output drive capabilities. Regardless of output functionality, each channel provides
constant input functionality. That is, the input level on each channel can be accessed without a
specific enable command. Moreover, the base functionality of the DIO channels is not affected by
triggering, scanning, or any other instrument process. Unless linked to a limit condition, as
discussed below, its operation is completely autonomous.