The 1761-NET-DNI features: high-speed local control with distributed DeviceNet I/O. support for peer-to-peer messaging between controllers, PCs, and other devices. programming and online monitoring over the DeviceNet network. dial-in to any other DNI-controller combination on DeviceNet (when the DNI is connected to a modem).The DH+ network is a local area network designed to support remote programming and data acquisition for factory-floor applications. You can also use DH+ communication modules to implement a peer-to-peer network. The DH+ network supports daisy-chain and trunkline-dropline configurations. The number of supported devices on a DH+ link and the maximum length of the cable depends on the communication rate. The table below shows the maximum cable lengths, communication rates and associated termination resistor sizes for the DH+ network.
DH-485 Network
The DH-485 communication network allows devices on the plant floor to share information. Via the network, application programs can: monitor process and device parameters and status, including fault and alarm detection. perform data acquisition. perform supervisory control functions. upload/download PLC programs over the network. The network offers connection to up to 32 nodes, token passing access control, and the ability to add or remove nodes without disrupting the network. DH-485 supports slave devices and features multiple-master capability.
DH-485/RS-232C Interface Module
The 1747-KE module is a communication interface that acts as a bridge between DH485 networks and RS-232C devices using DF1 protocol. It allows you to access your SLC 500 processor through an RS-232C link. When used in an SLC 500 chassis with a modem, the 1747-KE module enables remote programming and troubleshooting of any single SLC 500 processor, remote communication to a DH-485 network of SLC 500 processors, and remote data collection from the data table of any SLC 500 processor. The interface module allows you to use the SLC 500 as a remote terminal unit.
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