Measurement-computing WEB-TC Manual do Utilizador Página 18
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WEB-TC User's Guide Signal I/O Connections
18
WEB-TC screw terminal descriptions
Pin
Signal Name
Pin Description
Pin
Signal Name
Pin Description
1
RSVD*
Reserved
27
RSVD*
Reserved
2
NC*
No connect
28
AGND
Analog ground
3
C0H
CH0 sensor input (+)
29
C7L
CH7 sensor input (-)
4
C0L
CH0 sensor input (-)
30
C7H
CH7 sensor input (+)
5
RSVD*
Reserved
31
RSVD*
Reserved
6
RSVD*
Reserved
32
RSVD*
Reserved
7
C1H
CH1 sensor input (+)
33
C6L
CH6 sensor input (-)
8
C1L
CH1 sensor input (-)
34
C6H
CH6 sensor input (+)
9
AGND
Analog ground
35
NC*
No connect
10
RSVD*
Reserved
36
RSVD*
Reserved
11
RSVD*
Reserved
37
RSVD*
Reserved
12
NC*
"No Connect"
38
AGND
Analog ground
13
C2H
CH2 sensor input (+)
39
C5L
CH5 sensor input (-)
14
C2L
CH2 sensor input (-)
40
C5H
CH5 sensor input (+)
15
RSVD*
Reserved
41
RSVD*
Reserved
16
RSVD*
Reserved
42
RSVD*
Reserved
17
C3H
CH3 sensor input (+)
43
C4L
CH4 sensor input (-)
18
C3L
CH3 sensor input (-)
44
C4H
CH4 sensor input (+)
19
AGND
Analog ground
45
NC*
No connect
20
RSVD*
Reserved
46
RSVD*
Reserved
21
+5V
+5V output
47
NC*
No connect
22
PU/D
Pull-up/down for digital outputs
48
GND
Digital ground
23
DIO0
Digital Input/Output
49
DIO7
Digital Input/Output
24
DIO1
Digital Input/Output
50
DIO6
Digital Input/Output
25
DIO2
Digital Input/Output
51
DIO5
Digital Input/Output
26
DIO3
Digital Input/Output
52
DIO4
Digital Input/Output
*Make no connection to terminals labeled NC or RSVD.
Use 16 AWG to 30 AWG wire for your signal connections.
Tighten screw terminal connections
When making connections to the screw terminals, be sure to tighten the screw until tight. Simply touching the
top of the screw terminal is not sufficient to make a proper connection.
Thermocouple input terminals (C0H/C0L to C7H/C7L)
You can connect up to eight thermocouples to the differential sensor inputs (C0H/C0L to C7H/C7L).
The WEB-TC supports type J, K, R, S, T, N, E, and B thermocouples. The thermocouple type you select will
depend on your application needs. Review the temperature ranges and accuracies of each type to determine
which is best suited for your application. You can connect a different thermocouple type to each channel.
CJC sensors
The WEB-TC has four built in high-resolution temperature sensors for thermocouple measurements. Each CJC
sensor is dedicated to two thermocouple input channels, and is located behind the associated channel's screw
terminal. These sensors measure the ambient temperature at the terminal block so that the cold junction voltage
can be calculated.
Digital terminals (DIO0 to DIO7)
You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7. Each terminal is
software configurable for input or output. A PU/D terminal is provided for pull-up/down configuration
(explained on page 19).
If a digital bit is set up as an alarm, the bit is configured for output and assumes the state defined by the alarm
configuration.
- Thermocouple Measurement 2
- User's Guide 2
- HM WEB-TC.doc 3
- Table of Contents 5
- Chapter 4 6
- Chapter 5 6
- Chapter 6 6
- About this User’s Guide 7
- Introducing the WEB-TC 8
- WEB-TC block diagram 9
- Software features 9
- Installing the WEB-TC 10
- Unpacking the WEB-TC 11
- Installing the software 11
- Connecting the WEB-TC 11
- Using the web interface 14
- Logging in to a device 15
- Calibrating the WEB-TC 16
- Warm-up period 16
- Signal I/O Connections 17
- CJC sensors 18
- Thermocouple connections 19
- Digital I/O connections 20
- Functional Details 21
- Screw terminals 22
- Ethernet port 22
- External power connector 22
- POWER/COMM LED 22
- LINK/ACTIVITY LED 23
- Digital logic voltage switch 23
- Factory default reset button 23
- Ethernet Troubleshooting 24
- Check cached information 27
- Getting help 27
- Specifications 28
- Compatible thermocouples 29
- Accuracy 29
- Throughput rate 30
- Digital input/output 31
- Temperature alarms 31
- Microcontroller 31
- Network 32
- Environment 33
- Mechanical 33
- Declaration of Conformity 35
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