Hach Anatel PAT700 User Manual page 29

Discrete outputs
The analyzer has four discrete outputs. Wiring connects to terminals on connector block
J22, as listed in
•
•
•
•
Table 5
J22 Block Terminal
1
2
3
4
5
6
7
8
Table 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.
J22 connector block
: Discrete input wiring terminal designations
Description
Digital output 1 (+)
Digital output 2 (+)
Common return for discrete outputs 1 and 2 (–)
Digital output 3 (+)
Digital output 4 (+)
Common return for discrete outputs 3 and 4 (–)
• 12 VDC power supply +
• Connect only if input device requires power
supply
• 12 VDC power supply –
• Connect only if input device requires power
supply
Variable
TOC alarm
Uncompensated conductivity
alarm
TOC alarm, uncompensated
conductivity alarm
Warning or failure
TOC analysis start
Warning or failure,
TOC analysis start
Input power supply
Input power supply
Installation
Designation
DO1+
DO2+
DO1/2–
DO3+
DO4+
DO3/4–
+12V
GND
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