Overview.
This board serves as an expansion board for the M1 – Modbus Serial Server Board. It holds the core. This board provides 28 discrete inputs, 28 discrete outputs, 4 analog inputs and 4 analog outputs. It also has a DB25 connection for connecting the pendants provided by CNC4PC (MPG2, MPG3, and MPG4).
Features :
•
28 Discrete Inputs, 28 Discrete Outputs, 4 Analog Inputs and 4 Analog Outputs. Discrete outputs provide +5vdc@24 milliamps signals. Discrete inputs are +5vdc open collector, but a +5vdc terminal is available if you need to connect NO/NC type connections. Analog inputs and outputs are 0-10vdc and have 8 bit resolution. That means they deliver a value from 0-255.
•
Fully Optoisolated. All groups of I/Os are fully optoisolated
except for the outputs of the primary board. That means that the core is
powered with the power supplied to the primary board and this current
becomes common with the PC that is connected to the RS232 connector.
• Internal Safety Feature. All the
outputs are sent to ground until the core is running and in control of
the board. The on-board LED lights indicating the outputs have been
enabled..
•
Has a DB25 connector for connecting pendants provided by CNC4PC Pendants provided by CNC4Pc can be connected directly to this board without the need to use additional hardware or cables. A brain that drives the pendant is also available.
•
Has a relay that reflects the status of the e-stop button on the pendant. This relay can be used to enable/disable external devices, such as breakout boards, contactors, etc...
•
Jumpers for optionally bypassing the optoisolators If you are reading high speed encoders, you may want to bypass the optoisolators in order to increase the max reading speed. Regular inputs of the boards can work up to 10khz, but if you bypass the optos, speeds can reach up to 4MHz.
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