background image

©

 National Instruments Corporation

3

TB-2605 Isothermal Terminal Block

Figure 1.  

Two-Wire Mode

Figure 2.  

One-Wire Mode

05

39

06

40

11

45

12

46

24

58

25

59

28

62

29

63

26

60

COM2-

COM2+

CH15-

CH15+

CH14-

CH14+

CH13-

CH13+

CH12-

CH12+

CH11-

CH3+

CH2-

CH2+

CH1-

CH1+

CH0-

CH0+

1wireREF

GND

AB0+

AB0-

CH19-

CH19+

CH18-

CH18+

CH17-

CH17+

CH16-

CH16+

CH7-

CH7+

CH6-

CH6+

CH5-

CH5+

CH4-

CH4+

COM1-

COM1+

COM3-

COM3+

CH23-

CH23+

CH22-

CH22+

CH21-

CH21+

CH20-

CH20+

CH3-

CH11+

CH10-

CH10+

CH9-

CH9+

CH8-

CH8+

COM0-

COM0+

AB1+

AB1-

TRIG IN

SCANADV

68 POSITION I/O CONNECT

OR

 

10

44

13

47

14

48

15

49

16

50

19

64

31

65

32

66

33

67

22

GND

52

18

09

43

01

35

02

36

03

37

04

38

30

53

20

54

21

55

23

57

27

61

51

17

41

42

05

39

06

40

11

45

12

46

24

58

25

59

28

62

29

63

26

60

COM2-

COM2+

CH39

CH15

CH38

CH14

CH37

CH13

CH36

CH12

CH35

CH3

CH26

CH2

CH25

CH1

CH24

CH0

1wireREF

GND

AB0+

AB0-

CH43

CH19

CH42

CH18

CH41

CH17

CH40

CH16

CH31

CH7

CH30

CH6

CH29

CH5

CH28

CH4

COM1-

COM1+

COM3-

COM3+

CH47

CH23

CH46

CH22

CH45

CH21

CH44

CH20

CH27

CH11

CH34

CH10

CH33

CH9

CH32

CH8

COM0-

COM0+

AB1+

AB1-

TRIG IN

SCANADV

68 POSITION I/O CONNECT

OR

 

10

44

13

47

14

48

15

49

16

50

19

64

31

65

32

66

33

67

22

GND

52

18

09

43

01

35

02

36

03

37

04

38

30

53

20

54

21

55

23

57

27

61

51

17

41

42

Summary of Contents for TB-2605

Page 1: ...sothermal terminal block that consists of a printed circuit board with screw terminals The terminal block connects directly to the front panel I O connector of the NI 2501 or NI 2503 The terminal block can easily accommodate thermocouples resistance temperature detectors RTDs thermistors and voltage signals The TB 2605 features an isothermal construction to minimize the temperature gradients acros...

Page 2: ...nt switch cards What You Need to Get Started You need the following to set up and use your terminal block One of the following PXI switch cards NI 2501 NI 2503 NI 2501 2503 User Manual TB 2605 isothermal terminal block 0 10 in slotted screwdriver No 1 Phillips screwdriver Wire cutters Wire insulation stripper Analog bus connectors to connect to multiple cards Signal Names The NI 2501 2503 has seve...

Page 3: ... I O CONNECTOR 10 44 13 47 14 48 15 49 16 50 19 64 31 65 32 66 33 67 22 GND 52 18 09 43 01 35 02 36 03 37 04 38 30 53 20 54 21 55 23 57 27 61 51 17 41 42 05 39 06 40 11 45 12 46 24 58 25 59 28 62 29 63 26 60 COM2 COM2 CH39 CH15 CH38 CH14 CH37 CH13 CH36 CH12 CH35 CH3 CH26 CH2 CH25 CH1 CH24 CH0 1wireREF GND AB0 AB0 CH43 CH19 CH42 CH18 CH41 CH17 CH40 CH16 CH31 CH7 CH30 CH6 CH29 CH5 CH28 CH4 COM1 COM1...

Page 4: ...ewdriver 5 Insert the stripped wires into the screw terminals Tighten the screws with the 0 10 in slotted screwdriver 6 Connect safety ground or shield wires to the chassis ground connection tab 7 using the provided solder lug 6 7 Tighten or replace the strain relief screws 10 8 Replace the terminal block cover 1 and tighten the cover screws 2 05 39 06 40 11 45 12 46 24 58 25 59 28 62 29 63 26 60 ...

Page 5: ...gure 4 TB 2605 Parts Locator Diagram 1 Cover 2 Cover Screws captive 3 Strain Relief Bar 4 Chassis Connection Screws 5 Ground Lug Screw 6 Ground Solder Lug 7 Chassis Ground Tab 8 Connection to Switch Card 9 Analog Bus Connectors 10 Strain Relief Screws 1 2 8 4 4 9 10 7 6 5 3 ...

Page 6: ...03 connector the numbers in parentheses refer to items in Figure 5 Note The TB 2605 terminal block must be installed on the NI 2501 2503 switch card after the card is installed in the chassis 1 Install the switch card 3 into the chassis and tighten the two module screws 2 2 Guide the terminal block onto the switch card connector 4 3 Tighten the two terminal block mounting screws 1 Caution The conn...

Page 7: ...rminal block before you connect the analog bus plug because the plug screws into the cover the numbers in parentheses refer to items in Figure 6 1 With two terminal blocks connected to boards in adjacent slots connect the analog bus plug 3 into the analog bus connector 1 of each terminal block 2 Tighten the screw 2 on the analog bus plug using the 0 10 in slotted screwdriver 1 Terminal Block Mount...

Page 8: ...the terminal block has two connectors for connecting to the analog bus The low voltage analog bus plug can be used to connect the analog buses of adjacent switch cards as shown in Figure 6 The signal connections for the analog bus are shown in Figure 7 1 Analog Bus Connector 2 Analog Bus Plug Screw 3 Analog Bus Plug 1 2 3 ...

Page 9: ...ltage to cold junction temperature T C TK 273 15 where TK is the temperature in kelvin a 1 295361 x 10 3 b 2 343159 x 10 4 c 1 018703 x 10 7 RT resistance of the thermistor VTEMPOUT output voltage of the temperature sensor 1 Includes the combined effects of the temperature sensor accuracy and temperature difference between the temperature sensor and any screw terminal The temperature sensor accura...

Page 10: ...ut channel of your measurement device The 200 mV range is designed to eliminate the necessity of changing a measurement device s signal range to measure the cold junction sensor while scanning thermocouples Use an average of a large number of samples to obtain the most accurate reading Noisy environments require more samples for greater accuracy Figure 8 shows the circuit diagram of the TB 2605 co...

Page 11: ...0 cm 3 3 by 4 2 by 0 80 in Max voltage signal common mode Each input should remain within 30 Vrms or 60 VDC of ground and all other channels to eliminate the possibility of hazardous shock 1 Includes the combined effects of the temperature sensor accuracy and the temperature difference between the temperature sensor and any screw terminal The temperature sensor accuracy includes tolerances in all ...

Page 12: ...nal Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents 1999 2007 National Instruments Corporation All rights reserved 372258B Nov07 ...

Reviews: