55-Pin Backplane Connector Pin Configuration - Keysight U2751A Guía Del Usuario Y Servicios

1 Getting Started

55-Pin Backplane Connector Pin Configuration

The 55-pin backplane connector is used when the U2751A module is inserted into
the U2781A USB modular instrument chassis. For more details, refer to the
Keysight U2781A USB Modular Instrument Chassis User's Guide.
GND GND GND
NC NC NC
GND TRIG3 GND
TRIG4 GND TRIG5
nBPUB CLK10M GND
NC NC NC
11 10 9
Figure 1-5
Table 1-2 Synchronous Simultaneous Interface (SSI) connector pin description
SSI timing signal
GND
NC
VBUS
USB_D+, USB_D–
TRIG0~TRIG7
+12 V
nBPUB
CLK10M
STAR_TRIG
GA0,GA1,GA2
32
GND GND GND
NC NC NC
TRIG2 ND TRIG1
GND TRIG6 GND
STAR_TRIG GA2 GA1
NC NC NC
8 7
55-pin backplane connector pin configuration
GND GND GND
NC NC VBUS
GND TRIG0 GND
TRIG7 GND +12 V
GA0 NC +12 V
NC NC +12 V
6 5 4
Functionality
Ground
Not connected
USB bus power sensing input
USB differential pair
Trigger bus
+12 V power with 4 A current
USB backplane input detect
10 MHz clock source
Star trigger
Geographical address pin
Keysight U2751A User's and Service Guide
GND GND
GND USB_D–
GND USB_D+
+12 V GND
+12 V +12 V
+12 V +12 V
3 2 1
F
E
D
C
B
A