8520-CRTC A-B controller module
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MicroLogix 1400 controllers provide three communications ports: an isolated combination RS-232/ RS-485 communication port (Channel 0), an Ethernet port (Channel 1), and a non-isolated RS-232 communication port (Channel 2). You can connect Channel 0 and Channel 2 ports on the MicroLogix 1400 controller to the following: • Operator interfaces, personal computers, and so on, with DF1 full-duplex point-to-point • A DH-485 network • A DF1 Radio Modem network • A DF1 half-duplex network as an RTU master or RTU slave • A Modbus network as an RTU master or RTU slave • An ASCII network • An Ethernet network using the Ethernet Interface module (catalog number 1761-NET-ENI, or 1761-NET-ENIW) • A DNP3 network as a slave
When connecting to an RS-485 network with DH-485, DF1 half-duplex master/slave, Modbus RTU master/slave, or DNP3 slave protocols, you can connect the MicroLogix 1400 controller directly via Channel 0 without an Advanced Interface Converter, catalog number 1761-NET-AIC. The Channel 0 combo port provides both RS-232 and RS-485 isolated connections. The appropriate electrical interface is selected through your choice of communication cable. The existing MicroLogix 1761 communication cables provide an interface to the RS-232 drivers. The 1763-NC01 cable provides an interface to the RS-485 drivers.
The structure and details of the product：
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