VTI Instruments EX1000A - Voltage Connections

VTI Instruments Corp.
52 EX10xxA Preparation for Use
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.
P1 Connector
P2 Connector
P3 Connector
Pin
Signal
Pin
Signal
Pin
Signal
1
CJC0_RETURN
1
CJC4_RETURN
1
CJC8_RETURN
2
CH07-HI
2
CH23-HI
2
CH39-HI
3
CH07-LO
3
CH23-LO
3
CH39-LO
4
CH06-HI
4
CH22-HI
4
CH38-HI
5
CH06-LO
5
CH22-LO
5
CH38-LO
6
CH05-HI
6
CH21-HI
6
CH37-HI
7
CH05-LO
7
CH21-LO
7
CH37-LO
8
CH04-HI
8
CH20-HI
8
CH36-HI
9
CH04-LO
9
CH20-LO
9
CH36-LO
10
CH03-HI
10
CH19-HI
10
CH35-HI
11
CH03-LO
11
CH19-LO
11
CH35-LO
12
CH02-HI
12
CH18-HI
12
CH34-HI
13
CH02-LO
13
CH18-LO
13
CH34-LO
14
CH01-HI
14
CH17-HI
14
CH33-HI
15
CH01-LO
15
CH17-LO
15
CH33-LO
16
CH00-HI
16
CH16-HI
16
CH32-HI
17
CH00-LO
17
CH16-LO
17
CH32-LO
34
CJC0_INPUT
34
CJC4_INPUT
34
CJC8_INPUT
35
CH15-LO
35
CH31-LO
35
CH47-LO
36
CH15-HI
36
CH31-HI
36
CH47-HI
37
CH14-LO
37
CH30-LO
37
CH46-LO
38
CH14-HI
38
CH30-HI
38
CH46-HI
39
CH13-LO
39
CH29-LO
39
CH45-LO
40
CH13-HI
40
CH29-HI
40
CH45-HI
41
CH12-LO
41
CH28-LO
41
CH44-LO
42
CH12-HI
42
CH28-HI
42
CH44-HI
43
CH11-LO
43
CH27-LO
43
CH43-LO
44
CH11-HI
44
CH27-HI
44
CH43-HI
45
CH10-LO
45
CH26-LO
45
CH42-LO
46
CH10-HI
46
CH26-HI
46
CH42-HI
47
CH09-LO
47
CH25-LO
47
CH41-LO
48
CH09-HI
48
CH25-HI
48
CH41-HI
49
CH08-LO
49
CH24-LO
49
CH40-LO
50
CH08-HI
50
CH24-HI
50
CH40-HI
TABLE 2-3: VOLTAGE CONNECTOR SIGNAL ASSIGNMENTS
Pin 1
Pin 34
Pin 18
Pin 17
Pin 50
Pin 33
FIGURE 2-12: VOLTAGE CONNECTOR PIN LOCATIONS
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.