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Wiring connector 1-2
Wiring connector 3-4
Wiring connector block Terminal Description
About conduit wiring connections
Some analyzers have three ¾-inch female NPT conduit openings instead of quick-connect wiring
connections. These analyzer have internal connector blocks for power, three 4–20 mA outputs, two
discrete inputs and three discrete outputs. Refer to
The connector blocks are located on the I/O circuit board behind the user interface. Use an Allen
wrench to open the compartment.
Use one conduit opening for power supply wiring. Use the other two conduit openings for 4-20 mA
and/or discrete I/O wiring. Install twisted-pair unshielded wiring, 18 to 14 AWG (1.0 to 2.5 mm²) for all
wiring except the power supply wiring.
For the connector block terminal designations, refer to
Table 6
on page 13.
Note: The connector blocks can be unplugged from the analyzer for easier installation of wiring.
Table 4 Quick connect – Discrete output 1 and 2
Terminal Description
1
Digital output 1 (+)
2
Digital output 2 (+)
3
Common return (–)
4
12 VDC power supply + Input power supply
5
12 VDC power supply – Input power supply
Table 5 Quick connect – Discrete output 3 and 4
Terminal Description
1
Digital output 3 (+)
2
Digital output 4 (+)
3
Common return (–)
4
12 VDC power supply + Input power supply
5
12 VDC power supply – Input power supply
Table 6 Connector block – Discrete outputs
1
Digital output 1 (+)
2
Digital output 2 (+)
3
Common return (–)
4
Digital output 3 (+)
5
Digital output 4 (+)
6
Common return (–)
7
12 VDC power supply + Input power supply
8
12 VDC power supply – Input power supply
Default value
TOC alarm (configurable)
Conductivity alarm (configurable)
Digital output 1 and 2 common
return
Default value
Error alarm (configurable)
Valve state (TOC analysis start,
configurable)
Digital output 3 and 4 common
return
Default value
TOC alarm (configurable)
Conductivity alarm (configurable)
Digital output 1 and 2 common
return
Error alarm (configurable)
Valve state (TOC analysis start,
configurable)
Digital output 3 and 4 common
return
Figure
6.
Table 2
on page 12,
Designation
DO1+
DO2+
DO1/2–
+12 V
GND
Designation
DO3+
DO4+
DO3/4–
+12 V
GND
Designation
DO1+
DO2+
DO1/2 –
DO3+
DO4+
DO3/4 –
+12 V
GND
Table 3
on page 12 and
English 13
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