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PRESYS
Instruments
2.2 - Electrical Installation
DMY-2030-Light-5S-Energy Indicator may be powered by voltage between 75 and
264 Vac or 100 to 360 Vdc, any polarity. Remember that the internal circuit is powered
whenever the instrument is connected to the external power supply.
Input and output connections must be connected to the instrument only when it is
turned off.
Figure 3 shows the instrument rear terminals for connection of power supply,
ground, communication, process input and output signals.
Signal wiring must be kept far away from power wires.
Due to its metal case the instrument ground should be connected to earth ground.
Never connect the ground to neutral terminal.
2.3 - Process Input Signal Connections
The Indicator universal standard inputs can be connected to thermocouples, 3-
wire RTD, current (mA) or voltage (V or mV). See the different types and ranges of input
sensors in table 1, section 1.3 on Technical Specifications.
The input sensor is enabled by software configuration (see section 3.2 on
Configuration) and by the selection of the appropriated terminals of the
instrument.
In order to avoid noise in the wiring, use twisted pair cable and cross sensor
connection wire inside a metallic tube or use shielded cable. Make sure to connect only
one shield wire end either to terminal or to sensor ground, as shown in the next items.
WARNING: GROUNDING TWO SHIELD WIRE ENDS MAY CAUSE NOISE IN
THE INDICATOR.
Fig. 3 - Indicator Terminals
DMY-2030-Light-5S-Energy
Installation
Page 7
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