Class 3200 Meter - E-Mon

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CLASS 3200 METER6.7 RS-485 Wiring (continued)* An alternate version of firmware is available that replaces Modbus RTU with BACnetMS/TP. The meter must be ordered with this option if BACnet is desired instead ofModbus.There are two connection methods, daisy-chain and wire terminal, for RS-485communications.Daisy-Chain MethodThis is the simplest method for connecting meters together.M32776Fig. 9. Daisy-chain Configuration.1. Connect the +(high) terminal of PORT 1 of each meter together so that the + terminalson all meters are linked, + to + to +...2. Connect the -(low) terminal of PORT 1 of each meter together so that the - terminalson all meters are linked, - to - to -...3. Connect the GND terminals of PORT 1 to meter 1 ONLY. The GND terminalsshould not be linked to each meter.4. Torque screws to 2.2 in-lb.RS-485TERMINALFig. 10. RS-485 Terminal.M3319562-0390-02 20
CLASS 3200 METER6.7 RS-485 Wiring (continued)6.7.1 RS-485 Bias ResistorsWhen interfacing the Class 3200 meter to certain RS-485 communication equipment, itmay be necessary to add bias resistance to the circuit. If this is required, there is a 2-position DIP switch on the meter’s door mounted (display) circuit board. With bothpositions in the “ON” position, bias resistance is added to the RS-485 circuit. Whenboth positions are in the “OFF” position, no bias is added to the RS-485 circuit.Fig. 11. Bias Resistors DIP Switch.After performing these steps, all of the meters will be connected in a daisy chainconfiguration. This network of meters can then be connected to the RS-485 networkand communication can be established.Local ComputerA local computer installed in the building can communicate with the RS-485 networkutilizing E-Mon’s RS-232 conversion key. The RS-232 key is connected to the RS-485terminals in the closest meter using a cable with an RJ-11 plug terminating the endthat is plugged into the key and is open wiring on the other end for attachment to themeter’s 3-screw RS-485 terminal block.GND (GREEN)HIGH (BLACK)LOW (RED)RJ−11PLUG1 - NC2 - GND3 - HIGH 2 3 44 - LOWFRONT VIEWM33196Fig. 12. RS-485 Wiring.21 62-0390-02
Page 1 and 2: Class 3200 MeterADVANCED KWH/DEMAND
Page 4 and 5: CLASS 3200 METER1.0 INTRODUCTIONThe
Page 6 and 7: CLASS 3200 METER2.0 INTERNAL ELECTR
Page 8 and 9: CLASS 3200 METER3.0 METER TECHNICAL
Page 10 and 11: CLASS 3200 METER4.0 SAFETY LABEL DE
Page 13 and 14: 6.2 Main Power Board Connections (c
Page 15 and 16: 6.3 Phasing of Line VoltageCLASS 32
Page 17 and 18: 6.4.1 Current Sensor WiringCLASS 32
Page 19: 6.6.2 Current Sensor DiagnosticsCLA
Page 23 and 24: CLASS 3200 METER6.8.2 Connecting th
Page 25 and 26: 6.9.1 Modem (RS-232 KEY RM)CLASS 32
Page 27 and 28: 6.10 Modbus RTU WiringCLASS 3200 ME
Page 29 and 30: 6.13 Ethernet CommunicationsEtherne
Page 31 and 32: 7.0 MULTIPLE-LOAD MONITORING(CONTIN
Page 33 and 34: 9.0 LITHIUM BATTERY REPLACEMENT(CON
Page 35 and 36: 10.2 Normal Mode Display ScreensThe
Page 37 and 38: 10.3.1 Date & TimeTo change the dat
Page 39 and 40: 10.3.3 Peak Demand ResetTo reset th
Page 41 and 42: 11.0 HIGH VOLTAGE METERINGkWh Meter
Page 43 and 44: This special high voltage meter ins
Page 45 and 46: ModBus Customer Point Map: CL3200Ad
Page 47 and 48: InstanceID1 1 AnalogInput2 1 Analog
Page 49 and 50: InstanceIDBACnet Object Descriptors
Page 51 and 52: 13.0 LIMITED METER WARRANTYSubject

Class 3200 Meter - E-Mon

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