Installing The Modbus Rs-485 Cable - Advanced Energy AE 600 User Manual

Advanced Energy

Installing the Modbus RS-485 Cable

MODBUS RS-485 WIRING REQUIREMENTS
The Modbus RTU connections are made using shielded, insulated, 18-24 gauge
twisted-pair communication cable that has a characteristic impedance of 120 ohms. If
the RS-485 network will not pass through any high voltage (> 300 V) areas, then
300 V rated cable may be used in the low voltage data monitoring compartment of
the inverter. Check with your local inspector or project engineer if you need
assistance in determining this requirement. Some appropriate 300 V data cables
include:
• Belden 3105A (1P22AWG shielded)
• Belden 3082A (1P15AWG + 1P18AWG shielded)
Belden 7897A (1P15AWG + 1P18AWG shielded) is an example of a 600 V rated
cable that may also be used; others exist as well.
TO INSTALL THE MODBUS RS-485 CABLE
DANGER:
Risk of electrical shock. High voltages are present in the inverter cabinet.
Both AC and DC disconnects must be in the OFF position when working on
the unit. Wait five minutes to discharge high voltage before opening the front
panels of the inverter.
DANGER:
Risque d'électrocution. L'intérieur de l'onduleur est soumis à des hautes
tensions. Les interrupteurs de courant alternatif et continu doivent être mis
HORS TENSION durant les travaux sur l'unité. Attendez cinq minutes afin de
permettre la décharge du courant haute tension avant de démonter les
panneaux avant de l'onduleur.
1. Disconnect the power to the inverter before starting the installation.
2. Remove the data monitoring gland plate on the upper left side of the inverter.
The data monitoring gland plate is a flat piece of metal covering the side entry
port to the inverter's data monitoring compartment.
3. Punch or drill a hole in the desired location to allow access for the cable.
4. Install a water-tight conduit hub connection.
5. Replace the gland plate.
6. Route a RS-485 cable from the master device on the Modbus network port in
the facility that has been approved by the network administrator through the
conduit hub.
6‑8 Data Monitoring and Controls 570-1001791-05A