I/O Wiring - Hach ANATEL PAT700 Operator's Manual

PAT700 Total Organic Carbon Analyzer – Installation

I/O wiring

The analyzer has three 4-20 mA outputs, two discrete inputs, and four discrete outputs.
4-20 mA outputs
The analyzer has three 4-20 mA outputs, as listed in
• Analog output 1 represents TOC (total organic carbon).
• Analog output 2 represents conductivity or resistivity (user selected).
• Analog output 3 represents temperature in °F or °C (user selected).
Table 2-7 4-20 mA output wiring terminal designations
Wiring connector Terminal
1
2
3
4
5
6
Discrete inputs
The analyzer has two discrete inputs, as listed in
• Discrete input 1 initiates TOC analysis. When the output state switches from high to
• Discrete input 2 switches the analyzer modes. If digital output 2 is in high state, the
Table 2-8 Discrete input wiring terminal designations
Wiring connector Terminal
1
2
3
4
5
Anatel
Description
4-20 mA source output for analog output 1 (+)
4-20 mA sink output for analog output 1 (–)
4-20 mA source output for analog output 2 (+)
4-20 mA sink output for analog output 2 (–)
4-20 mA source output for analog output 3 (+)
4-20 mA sink output for analog output 3 (–)
low, the analyzer stops the current operation and runs a single TOC analysis. After the
analysis is complete, the analyzer returns to the mode defined by digital input 2. During
the TOC analysis, the analyzer ignores all subsequent trigger values.
analyzer is in TOC mode. If digital output 2 is in low state, the analyzer runs in flow with
conductivity mode.
Description
Common connection for external sourcing (+)
Digital input 1 voltage source return input (–)
Digital input 2 voltage source return input (–)
• 12 VDC power supply +
• Connect only if output device requires power
supply
• 12 VDC power supply –
• Connect only if output device requires power
supply
Table 2-7.
Variable
TOC
TOC
Conductivity or
resistivity
Conductivity or
resistivity
Temperature
Temperature
Table 2-8.
Variable
Common
Initiates TOC analysis
Analyzer mode
Output power supply
Output power supply
Page 23
Designation
AO1+
AO1–
AO2+
AO2–
AO3+
AO3–
Designation
DI1/2+
DI1–
DI2–
+12V
GND
Operator Manual