Macurco DVP-1200, Manual

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Macurco TM DVP-1200 Manual
REV – 1.3.1 [34-8708-4770-7 ] 10 | P a g e
twisted pairs of the appropriate gauge, with an overall foil and braid shield. All shields should be terminated at the DVP-1200
end of the cable only.
The power connections to the MRS-485 and remote mounted sensors should be size 18 AWG (minimum) for short runs. Refer to
Table 3 1 for recommended wire gauges. The power for the MRS-485 adapter is connected via a two-terminal screw type
connector, 12 to 24 VAC or 12 to 24 VDC and no polarity.
The MRS-485 adapter output is wired in the standard 2W-Modbus circuit definition with selectable built-in terminating resistors
at the ends of the RS-485 bus. It is recommended to always use twisted wires to reduce noise and allow for reliable data
communication over greater distances. For best performance use shielded 3-conductor wire with one twisted pair providing a
pair for signal (A & B), common (COM) and shield ground (SHD) connections. Use at least 3-conductor wire with one twisted pair
providing a pair for signal (A & B) and common (COM) connections. The Macurco MRS-485 Modbus output is connected via a
four-terminal screw type connector.
Running the Modbus cable adjacent to or in the same conduit with high voltage wires is not recommended as there may be
interference from the high voltages near the bottom left corner of the panel.
3.2.2 Installation Diagram
Figure 3-3 – DVP-1200 Board Diagram