Emerson Net Safety Millennium II SC310, Manual

Page: 15 / 40

3.3.2 Wire sensor
WARNING
Do not open enclosures in a classified area (Do not open when an explosive atmosphere
may be present). Ensure the power to the transmitter is switched off before connecting
sensor wires.
Avoid touching electronic components, as they are susceptible to electrostatic discharge
(ESD). Refer to
Electrostatic sensitive device (ESD) .
Connect sensor wires to the sensor terminals in the applicable transmitter. Refer to the
Table 3-1 for sensor terminal definitions.
Table 3-1: Sensor Wires and Millennium II Series Terminal Definitions
Sensor terminals
Sensorwir
e
White Red Blue Black Green
Marked
+Vdc Sig A Sig B COM
Function
10.5 -
32Vdc
A B
Common/
supply
ground
Earth
ground
Note
When separating sensor from transmitter using Net Safety separation kit, refer to Multi-
purpose Junction Box Manual (MAN-0081) for terminal designations. Always ensure that
the transmitter is supplying the required voltage across sensor power terminals inside
junction box. Refer to table above for sensor voltage requirements.
3.3.3 Installation checklist
Review the following checklist prior to turning the power on to the transmitter after
completing installation.
• Ensure transmitter and sensor are properly and firmly mounted.
• Ensure that stopping plug is tightened to unused conduit entry.
• Ensure transmitter and sensor are not being obstructed; transmitter and sensor are
accessible and target gas is not inhibited from reaching sensor.
• Ensure adherence to applicable local guidelines and requirements on wiring and
sealing of equipment in hazardous and non-hazardous areas.
• Ensure that proper shielding and grounding practices are adhered to, and local codes
are being followed.
• Check system operational voltage and conditions, ensuring that they are within the
applicable specifications of the transmitter and sensor.
• Check wiring at all termination and junction points: transmitter, junction box, and
power supply.
Safety Manual Installation
00809-0100-4310 May 2021
Net Safety SC310 15