Hach PAT700 - Connect the Discrete Inputs; Connect the Discrete Outputs

Table 2 4–20 mA terminal designations
Connector Terminal Description Variable Designation
1 4–20 mA source output for analog output
1 (+)
TOC AO1+
2 4–20 mA sink output for analog output 1 (–) TOC AO1–
3 4–20 mA source output for analog output
2 (+)
Conductivity or resistivity AO2+
4 4–20 mA sink output for analog output 2 (–) Conductivity or resistivity AO2–
5 4–20 mA source output for analog output
3 (+)
Temperature AO3+
6 4–20 mA sink output for analog output 3 (–) Temperature AO3–
7 —
8 —
Connect the discrete inputs
Table 3 shows the discrete input designations for the quick-connect connector.
Table 3 Discrete input designations
Connector Terminal Description Variable Designation
1 Common connection for external
source (+)
Common DI1/2+
2 Digital input 1 (–) Start a single TOC analysis DI1–
3 Digital input 2 (–) TOC or conductivity mode
selection
DI2–
4
1
12 VDC power supply + Output power supply +12 V
5 12 VDC power supply – Output power supply GND
1
Connect terminals 4 and 5 only if the input device requires a power supply.
Connect the discrete outputs
The terminal designations for the discrete output quick connections are shown in Table 4 and
Table 5. The terminal designations for the discrete output connector block is shown in Table 6.
14 English