Hach Polymetron 9523sc pH Basic User Manual page 16

Analog output connections
Potential Electrocution Hazard. Always disconnect power to the instrument when making electrical
connections.
Potential electrocution hazard. In order to maintain the NEMA/IP environmental ratings of the
enclosure, use only conduit fittings and cable glands rated for at least NEMA 4X/IP66 to route cables in
to the instrument.
Two isolated analog outputs (1 and 2) are provided
analog signaling or to control other external devices.
Make wiring connections to the controller as shown in
Note: Figure 5 shows the back of the controller cover and not the inside of the main controller compartment.
Recorder wires
Output 2–
Output 2+
Output 1–
Output 1+
1. Open the controller cover.
2. Feed the wires through the strain relief.
3. Adjust the wire as necessary and tighten the strain relief.
4. Make connections with twisted-pair shielded wire and connect the shield at the controlled
component end or at the control loop end.
• Do not connect the shield at both ends of the cable.
• Use of non-shielded cable may result in radio frequency emission or susceptibility levels higher
than allowed.
• Maximum loop resistance is 500 ohm.
5. Close the controller cover and tighten the cover screws.
6. Configure outputs in the controller.
16 English
W A R N I N G
W A R N I N G
(Figure
Figure 5
Table 3 Output connections
5). Such outputs are commonly used for
and Table 3.
Circuit board position
4
3
2
1