Hach Anatel PAT700 User Manual page 34

Installation
Table 9 Discrete outputs 1 and 2 wiring terminal designations
Wiring
connector
Terminal
1-2
1
2
3
4
5
Table 10 Discrete outputs 3 and 4 wiring terminal designations
Wiring
connector
Terminal
3-4
1
2
3
4
5
Page 32
Discrete outputs
The analyzer has four discrete outputs, as listed in
• 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.
Description
Digital output 1 (+)
Digital output 2 (+)
Common return for discrete outputs 1 and 2 (–)
• 12 VDC power supply +
• Connect only if input device requires power
supply
• 12 VDC power supply –
• Connect only if input device requires power
supply
Description
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
Table 9 and Table 10.
Variable
TOC alarm
Uncompensated conductivity
alarm
TOC alarm,
uncompensated conductivity
alarm
Input power supply
Input power supply
Variable
Warning or failure
TOC analysis start
Warning or failure,
TOC analysis start
Input power supply
Input power supply
Designation
DO1+
DO2+
DO1/2–
+12V
GND
Designation
DO3+
DO4+
DO3/4–
+12V
GND