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The DirectLOGIC 305 PLC series offers three specialty CPUs for applications that require an unconventional PLC solution, such as computer-controlled I/O or execution of control programs written in BASIC instead of RLL.
The DL305 series offers four specialty CPUs for applications that require an unconventional PLC solution, such
as computer-controlled I/O or execution of control programs written in BASIC instead of RLL.
The specialty CPUs are:
F3-OMUX-1 and F3-OMUX-2
The F3-OMUX (-1, -2) CPU plugs into the first slot of a DL305 base. It acts as a serial interface to the control
program in the host computer and up to 184 DL305 I/O per CPU. Multiple CPUs can be daisy-chained together to
increase I/O count. The host computer must use an OPTOMUX serial communication driver. The host can execute a
custom program or use a standard software package that supports OPTOMUX drivers such as Intouch-Wonderware,
Iconics-Genesis, U.S. Data FactoryLink, Metra-Skyhawk Lt, etc.
Two serial ports that support the OPTOMUX protocol
F3-OMUX-2 RS422/RS485 (isolated)
Max of 184 I/O points per CPU (with expansion base unit)
Scan time is dependent on the communication speed, number of
commands sent, type of commands sent, the size of the response and
the speed of the host computer.
The F3-PMUX is similar in operation to the F3-OMUX (-1, -2). It uses a parallel interface instead of serial
interface. As a result, it requires the host computer to use a PAMUX communication board (OPTO22 part number
AC28 or equivalent). With this board, you can use PAMUX communication drivers in your host software. Scan time
constraints are similar to the OMUX units.