Hach-Lange POLYMETRON 9523 User Manual - Manual (Page 13)

Figure 4 Wiring connections overview
1 Service cable connection 5 AC and DC power connector 1 9 Discrete input wiring connector 1
2 4-20 mA output 1 6 Ground terminals 10 Digital sensor connector 1
3 Sensor module connector 7 Relay connections 1
4 Communication module
connector (e.g., Modbus,
Profibus, HART, optional
4-20 mA module, etc.)
8 Digital sensor connector 1
1 Terminals can be removed for improved access.
High-voltage barrier
High-voltage wiring for the controller is located behind the high-voltage barrier in the controller
enclosure. The barrier must remain in place except when installing modules or when a qualified
installation technician is wiring for power, alarms, outputs or relays. Do not remove the barrier while
power is applied to the controller.
Wiring for power
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. If this equipment is used outdoors or in potentially wet locations, a
Ground Fault Interrupt device must be used for connecting the equipment to its mains power source.
English 11