VTI Instruments Corp.
22
Introduction
EMX-4250/4251,
EMX-4016B/EMX-4016M
C
ONNECTOR
P
IN
A
SSIGNMENTS
The table below shows the connector pin assignments for the EMX-4250/4251, EMX-4016B/EMX-
4016M. Signals identified in blue color are the signals referenced to DGND and used to control the
fault LED’s in the Break-Out-Boxes (BOB’s).
TRIG IN (in green) is referenced to digital ground.
VCALP & VCALN provide the built-in calibration signal out to a BNC in the BOB so it can be
connected to a DMM and used during factory calibration.
BOB INT is used to let the EMX-4250/4251 know that a BOB has been connected to the digitizer.
CH #
Signal
Molex 83614-9012
Signal
Pin #
Pin #
1
CH1P
1
14
CH1N
2
CH2P
2
15
CH2N
3
CH3P
3
16
CH3N
4
CH4P
4
17
CH4N
TRIG IN
5
18
DGND
BOB INT
6
19
DGND
AGND
7
20
3.3VDC
VCALP
8
21
I2C CLK
VCALN
9
I2C DAT
5
CH5P
10
22
CH5N
6
CH6P
11
23
CH6N
7
CH7P
12
24
CH7N
8
CH8P
13
25
CH8N
EMX-4250/4251, EMX-4016B/EMX-4016M DSUB Connector Pin Assignments
Figure 1-4: EMX-4016M RJ-45 Input Connector Pin Assignment
Color Coding per TIA/EIA-568-B
Pin 1 - Orange/White
Pin 2 - Orange
Pin 3 - Green/White
Pin 4 - Blue
Pin 5 - Blue/White
Pin 6 - Green
Pin 7 - Brown/White
Pin 8 - Brown
Pinout for Upper Connector Row
Excitation Sense
Shield Gnd
Sense
Excitation
R Cal
Sense
- +
-
-
+
Shield Gnd
6
5
4
2
1
3
8
7
Shield Gnd
Excitation
Excitation Sense
R Cal
+
-
-+
Shield Gnd
3
2
1
4 5 6 7 8
Sense
Sense
Pinout for Lower Connector Row
