Voltage Connections - VTI Instruments EX1000A User Manual

VTI Instruments Corp.

Voltage Connections

The EX1000A, EX1016A and EX1032A have 50-pin D-sub receptacles for the voltage input
channels. These channels are differential inputs and are mapped as pairs (see Table 2-3). The center
row of each 50-pin D-sub is connected to chassis GND. This allows for optimized shield termination
when using shielded pair wiring.
Pins 1 and 34 are used for connecting a remote thermistor to the internal signal conditioning circuits.
This is used when an external cold plate is being used for temperature measurement. The
recommended thermistor is U.S. Sensor P/N: PS103J2 or PS103J2-RoHS. This device is 10 kΩ at
25 °C with ±0.1 ºC initial accuracy and the 0 °C to 50 °C BETA is 3890. The thermistor path, within
the EX10xxA product, is single ended and designed to be connected to an electrically isolated
thermistor. The use of a grounded thermistor is not recommended.
52
P1 Connector
Pin Signal
1 CJC0_RETURN
2 CH07-HI
3 CH07-LO
4 CH06-HI
5 CH06-LO
6 CH05-HI
7 CH05-LO
8 CH04-HI
9 CH04-LO
10 CH03-HI
11 CH03-LO
12 CH02-HI
13 CH02-LO
14 CH01-HI
CH01-LO
15
16 CH00-HI
CH00-LO
17
34 CJC0_INPUT
35 CH15-LO
36 CH15-HI
37 CH14-LO
38 CH14-HI
39 CH13-LO
40 CH13-HI
41 CH12-LO
42 CH12-HI
43 CH11-LO
44 CH11-HI
CH10-LO
45
46 CH10-HI
47 CH09-LO
CH09-HI
48
49 CH08-LO
50 CH08-HI
T 2-3: V
ABLE OLTAGE
P i n 1 7
P i n 3 3
P i n 5 0
F 2-12: V
IGURE OLTAGE
P2 Connector
Pin Signal
1 CJC4_RETURN
2 CH23-HI
3 CH23-LO
4 CH22-HI
5 CH22-LO
6 CH21-HI
7 CH21-LO
8 CH20-HI
9 CH20-LO
10 CH19-HI
11 CH19-LO
12 CH18-HI
13 CH18-LO
14 CH17-HI
CH17-LO
15
16 CH16-HI
CH16-LO
17
34 CJC4_INPUT
35 CH31-LO
36 CH31-HI
37 CH30-LO
38 CH30-HI
39 CH29-LO
40 CH29-HI
41 CH28-LO
42 CH28-HI
43 CH27-LO
44 CH27-HI
CH26-LO
45
46 CH26-HI
47 CH25-LO
CH25-HI
48
49 CH24-LO
50 CH24-HI
C S A
ONNECTOR IGNAL SSIGNMENTS
C P L
ONNECTOR IN OCATIONS
P3 Connector
Pin Signal
1 CJC8_RETURN
2 CH39-HI
3 CH39-LO
4 CH38-HI
5 CH38-LO
6 CH37-HI
7 CH37-LO
8 CH36-HI
9 CH36-LO
10 CH35-HI
11 CH35-LO
12 CH34-HI
13 CH34-LO
14 CH33-HI
CH33-LO
15
16 CH32-HI
CH32-LO
17
34 CJC8_INPUT
35 CH47-LO
36 CH47-HI
37 CH46-LO
38 CH46-HI
39 CH45-LO
40 CH45-HI
41 CH44-LO
42 CH44-HI
43 CH43-LO
44 CH43-HI
CH42-LO
45
46 CH42-HI
47 CH41-LO
CH41-HI
48
49 CH40-LO
50 CH40-HI
P i n 1
P i n 1 8
P i n 3 4
EX10xxA Preparation for Use