Thermo Scientific DensityPRO-T - Power Supply Wiring

Wiring
Power Supply Wiring
Thermo Scientific DensityPRO Installation Manual 4-3
Power Supply
Wiring
Note: To meet the requirements of CSA 1010.1, an external switch or circuit
breaker must be installed to allow the power source to be disconnected from
the detector. In addition, protective bonding (grounding) must always be
provided, even if a DC power source is used.
Protective Earth
Grounding
The enclosure provides internal and external safety ground lugs for safety protective
earth grounding. The external safety ground lug connects the unit to earth ground.
The internal safety ground lug connects the AC power input ground line.
Safety Disconnect
Mains
Requirements
As permanently connected equipment, the DensityPRO detector requires a switch or
circuit breaker as the means for disconnection. Prepare the switch or circuit breaker
according to the following requirements:
1. Include a switch or circuit breaker in the building installation.
2. Ensure the switch or circuit breaker is in close proximity to the DensityPRO
detector and within easy reach of the operator.
3. Mark the switch or circuit breaker as the disconnecting device for the DensityPRO
detector.
DC Power
The detectors are designed to operate on 11 to 32 VDC. The input connector for the
DC source voltage wiring is located on the power supply board.
Note: To meet the requirements of CSA 1010.1, the input DC terminals shall
be supplied from a SELV (Safety Extra Low Voltage) source.
Connections are shown in the table below.
Table 4-1. DC Power Wiring
Signal /
Connector
MS2011DUR
Detector
MS2011T
Transmitter
MS2011DUI
(Integrated)
DC Power, Positive
+12 VDC (Connector
Pin 1)
VIN+
(PS-PCA J2A Pin 3)
VIN+
(PS-PCA J2A Pin 3)
DC Power,
Negative
GND
(Connector Pin 2)
GND
(PS-PCA J2A Pin 4)
GND
(PS-PCA J2A Pin 4)