Jan 26, 2006 · The DH-485 is a protocol, RS485 and RS232 are electrical interfaces. The NET-AIC only converts the DH-485 from Isolated RS485 to RS232 so the protocol can be seen by a regular RS232 Device. To Convert the protocol to Modbus you need the DL3500-Modbus/DH-485 and then you don't need the NET-AIC as the DL3500 also has isolated DH-485 and then it ...

Feb 18, 2022 · Data Highway was developed by Allen Bradley in the late 1970s as a proprietary network bus used to connect PLCs, remote IO systems, PCs, and HMls.

Jul 15, 2002 · Note, however, that the SLC 5/01 processor does not talk RS-485, but DH-485. The timing issues have been hashed out on this list many times. Suffice to say that a standard converter will not do the job. I did accomplish this, but it wasn't cheap. I had a range of 5/01, 5/03, and Micro 1000's on various production lines.

Nov 2, 2006 · I can't imagine control anymore running DF1 or DH-485, that’s such a 30+ year old technology , u really need to talk your Customers or etc into running Ethernet Devices, you'll spend a little more but trust me you will never regret it,run your Control off your SLC500 off a inet module we have thrown all our old DF1 DH-485 junk in the trash ...

Jan 19, 2000 · Every node on a DH-485 network must be talking DH-485 protocol. Many A-B devices, such as SLC-5/03 and up and most MicroLogix can talk DF1 or DH-485 protocol out their RS-232 port (Channel 0). Only a dumb external device (1747-NET-AIC) is required between the port and the DH-485 network for electrical isolation and conditioning.

Oct 4, 2003 · It´s suppoused to be configured as DH-485 for comm with a Panel View. Since it´s a bad idea change the PC port every time I want to change any of the programs, putting an AIC+ converter I pretend to get PC into the DH-485 network, but I don´t know the pinout of the PLC port to get it connected.

Jun 20, 2005 · 1) Create an isolated DH-485 network of three nodes, the SLC 5/03, PanelView, DL3500-DH-485/DF1. Assume the SLC5/03 to Panelview DH-485 is already an isolated DH-485 network with an A and B signal like one out of a AIC+ module or PIC. 2) Use 1 DL3500-DH-485/DF1 www.protocolconverter.com converter to convert DF1 to isolated DH-485. Then the ...

Apr 25, 2008 · My preferred option would be to run it through an OPC gateway such as RSLinx set up to communicate with the DH 485 driver. Using an OPC client on the SCADA the data from the PLCs could be brought in. However you'll need to presumably purchase the OPC server and an OPC client that can be used by the SCADA plus include set up time.

May 17, 2022 · Allen Bradley’s Data Highway Plus (DH+) networking ability is still found commonly in interfaces with legacy equipment. Understanding this network structure can bridge the gap between old and new systems.

Jan 18, 2001 · Hi to all I would like to know what are the differences between the protocols DH+ and DH485. I know some basic differences like speed, number of stations and limitations about distance. But for example I don't know if they have the same frame, or if …