User manual

Page 24 Installation – PAT700 Total Organic Carbon Analyzer
Operator Manual Anatel
Discrete outputs
The analyzer has four discrete outputs. Wiring connects to terminals on connector block J22,
as listed in Table 2-5.
• 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 2-5
J22 connector block: Discrete output wiring terminal designations
J22 Block 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 Digital output 3 (+) Warning or failure DO3+
5 Digital output 4 (+) TOC analysis start DO4+
6 Common return for discrete outputs 3 and 4 (–) Warning or failure,
TOC analysis start
DO3/4–
7 • 12 VDC power supply +
• Connect only if input device requires power supply
Input power supply +12V
8 • 12 VDC power supply –
• Connect only if input device requires power supply
Input power supply GND