Getting Started
1
Keysight U2741A User’s Guide
25
Instrument Configuration
55-Pin backplane connector pin configuration
The 55-pin backplane connector is used when the U2741A 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
.
Figure 1-1
55-pin backplane connector pin configuration
GND
NC
GND
TRIG4
nBPUB
NC
11
GND
NC
TRIG3
GND
CLK10M
NC
10
GND
NC
GND
TRIG5
GND
NC
9
GND
NC
STAR_TRIG
NC
8
TRIG2
GND
GND
NC
ND
TRIG6
GA2
NC
7
GND
NC
TRIG1
GND
GA1
NC
6
GND
NC
GND
TRIG7
GA0
NC
5
GND
NC
TRIG0
GND
NC
NC
4
GND
VBUS
GND
+12 V
+12 V
+12 V
3
GND
GND
GND
+12 V
+12 V
+12 V
2
GND
USB_D–
USB_D+
GND
+12 V
+12 V
1
F
E
D
C
B
A
Table 1-1
SSI connector pin description
SSI timing signal
Functionality
GND
Ground
NC
Not connected
VBUS
USB bus power sensing input
USB_D+, USB_D–
USB differential pair
TRIG0~TRIG7
Trigger bus
+12 V
+12 V power with 4 A current
nBPUB
USB backplane input detect
