Hach-Lange POLYMETRON 9523 Basic User Manual - Manual (Page 16)

Analog output connections
W A R N I N G
Potential Electrocution Hazard. Always disconnect power to the instrument when making electrical
connections.
W A R N I N G
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 ( Figure 5 ). Such outputs are commonly used for
analog signaling or to control other external devices.
Make wiring connections to the controller as shown in
Figure 5 and Table 3 .
Note: Figure 5 shows the back of the controller cover and not the inside of the main controller compartment.
Table 3 Output connections
Recorder wires Circuit board position
Output 2– 4
Output 2+ 3
Output 1– 2
Output 1+ 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