FlashCut CNC Section 2 Hardware Guide
4
Model No. 401A
S.N.__________
WPI
Menlo Park, CA
POWER
RS-232
INPUT OUTPUT
MOTOR SIGNALS
FUSE
DC IN – Receptacle for the power supply. The unit is shipped with a 9V
DC, 800-1000mA wall transformer power supply.
Fuse – Cartridge for the fuse. If the fuse blows, replace it with a 3AG,
1.5A slow-blow fuse.
RS-232 – Serial port connector for communication with the host PC (9 pin
female). Most PC’s have 9 pin male or 25 pin male. Use either a 9 Pin
Male - 9 Pin Female or a 9 Pin Male - 25 Pin Female cable depending on
the serial port on your PC.
INPUT – The connector for up to 8 input lines. The most common use of
the input lines is for limit or safety switches. These lines are all TTL- and
CMOS-compatible inputs. When a switch is open, its input signal is high
(+5V). When the switch is closed, its input signal is grounded low (0V).
The 401A is wired for all normally closed (NC) or all normally open (NO)
switches. When in NC mode, each line that is not connected to a switch
must be wired directly to its ground. When any of the input lines are
open, the red Limit light will illuminate and a signal will be sent to the
host PC to indicate which input line(s) went high. When in NO mode,
each line that is not connected should remain open. The red limit light will
illuminate when any of the switches close. To change between NO mode
and NC mode, set jumper JP3. When JP3 is shorted, it is in NO mode,
when JP3 is open, it is in NC mode. If you are not using any limit
switches, you should set JP3 to NO mode.
If you are using version 1.61 or earlier, and you are using normally closed
switches, make sure the Signal Generator Model 401A option is selected
in the System Options Setup dialog box. If you are using normally open
switches, make sure the Signal Generator Model 401 option is selected in
the System Options dialog box. All input lines must be properly defined
in the Input Lines Setup dialog box. If you are using Version 2 and higher,
go to the Configuration…Input Lines menu and make sure the NC or NO
option is chosen properly for the wiring you are using.
The input lines are also TTL/CMOS-compatible. The FlashCut CNC
display reflects a logic "1" or "OPEN" for a high-level input voltage, or
open switch and a logic "0" or "CLOSED" for a low-level input voltage or
closed switch. Short jumper JP3 if your switches are normally open or
your normal input status is logic high. Leave JP3 open if your switches
are normally closed or your normal input status is logic low. Note that all
switches and input lines should have the same normal state.
