GE Intellix BMT 330 Installation Manual page 30

Bushing monitoring and partial discharge detection for transformers

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Communications

RS-485 Modbus (standard)

The standard RS-485 connection is routed to the DIN rail from the main PCB as shown in

Figure 5-30.

Copper Ethernet (optional)

Copper Ethernet supports the Modbus protocol with DNP 3.0 or IEC 61850. With this

equipment, only shielded cable should be used to meet the required EMC standards. If an

optional communication channel has been specified, there will be an extra module on

the Intellix™ BMT 330 motherboard as shown in Figure 5-31. This module supports

MultiMaster communications.

Figure 5-31: Copper Ethernet

For more details on how to configure the optional communication module, see Appendix

The copper-based channel requires a cat 5e Ethernet cable and a clamp-on ferrite

(included in the Installation kit, see Appendix B). This cable must enter the cabinet

through one of the available cable glands and must be routed to the communication

module. The ferrite must be added to the Ethernet cable with 3 loops (4 passes) inside

the cabinet close to where the cable exits the cabinet.

MA-017 – BMT 330 Installation Manual – Rev 3.3

4-Mar-22

Page 30 of 69

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