Hach ANATEL PAT700 - 2.8 RS-232 commands

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Installation
Discrete outputs
The analyzer has four discrete outputs, as listed in Table 9 and Table 10.
• Discrete output 1 is a TOC alarm. The output reports the TOC level as above (low
state) or below (high state) the user-specified alarm limit.
• Discrete output 2 is an uncompensated conductivity alarm. A low state indicates the
conductivity level is above the alarm limit. A high state indicates the conductivity level
is below the alarm limit.
• Discrete output 3 reports a warning or failure condition. A low state indicates an error
condition exists. A high state indicates no error conditions exist.
• Discrete output 4 reports a TOC analysis start (by indicating the state of the sample
inlet valve). A low state indicates the sample valve is closed. A high state indicates the
sample valve is open.
Table 9 Discrete outputs 1 and 2 wiring terminal designations
Wiring
connector
1-2
Terminal Description Variable Designation
1 Digital output 1 (+) TOC alarm DO1+
2 Digital output 2 (+)
Uncompensated conductivity
alarm
DO2+
3 Common return for discrete outputs 1 and 2 (–)
TOC alarm,
uncompensated conductivity
alarm
DO1/2–
4
• 12 VDC power supply +
• Connect only if input device requires power
supply
Input power supply +12V
5
• 12 VDC power supply –
• Connect only if input device requires power
supply
Input power supply GND
Table 10 Discrete outputs 3 and 4 wiring terminal designations
Wiring
connector
3-4
Terminal Description Variable Designation
1 Digital output 3 (+) Warning or failure DO3+
2 Digital output 4 (+) TOC analysis start DO4+
3 Common return for discrete outputs 3 and 4 (–)
Warning or failure,
TOC analysis start
DO3/4–
4
• 12 VDC power supply +
• Connect only if input device requires power
supply
Input power supply +12V
5
• 12 VDC power supply –
• Connect only if input device requires power
supply
Input power supply GND