Watlow Controller Series D8, Руководство пользователя

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D8 Series User’s Guide
Chapter 2: Installation
33
Table 2.4
— Analog Input Connections Screw Terminal Option
TB1 TERMINAL NUMBER LABEL FUNCTION
1 CH 1 IN+ Channel 1 positive input
2 CH 1 IN- Channel 1 negative input
3 CH 2 IN+ Channel 2 positive input
4 CH 2 IN- Channel 2 negative input
5 CH 3 IN+ Channel 3 positive input
6 CH 3 IN- Channel 3 negative input
7 CH 4 IN+ Channel 3 positive input
8 CH 4 IN- Channel 3 negative input
9 Com Analog Common
10 Com Analog Common
11 CH 5 IN+ Channel 5 positive input 1
12 CH 5 IN- Channel 5 negative input
1
13 CH 6 IN+ Channel 6 positive input
1
14 CH 6 IN- Channel 6 negative input
1
15 CH 7 IN+ Channel 7 positive input
1
16 CH 7 IN- Channel 7 negative input
1
17 CH 8 IN+ Channel 8 positive input
1
18 CH 8 IN- Channel 8 negative input
1
19 Com Analog Common
1
Terminals 11 to 18 are not used with a 4-loop controller.
Input Wiring Recommendations
Use multicolored stranded shielded cable for analog inputs. Watlow recommends that you use
20 AWG wire (0.5 mm
2
). If the sensor manufacturer requires it, you can also use 24 or 22 AWG
wiring (0.2 mm
2
). Most inputs use a shielded twisted pair; some require a 3-wire input.
The controller accepts the following inputs without any special scaling resistors:
• J, K, T, S, R, B and E thermocouples
• Process inputs with ranges between -10 and 60mV
To avoid thermocouple open alarms on unused inputs, either set the Input type parameter to skip or
jumper the input.
Thermocouple Connections
Connect the positive lead of the thermocouple to the IN+ terminal for one of the loops, and connect
the negative lead to the corresponding IN- terminal.
Use 18 or 20 AWG (0.5 or 0.75 mm
2
) for all thermocouple inputs. Most thermocouple wire is solid,
unshielded wire. When using shielded wire, ground one end only.