Flashcut CNC Pro Series, Hardware Manual

Page: 15 / 59

FlashCut CNC Section 5 Signal Generator 15
5. Signal Generator
Input
The default setting for each of the input lines is normally closed (NC). The input line
settings can be individually changed between normally closed (NC) or normally open
(NO) input lines using FlashCut CNC software. Please refer to the FlashCut CNC
User’s Guide under “Input Line Settings” for further information.
In the FlashCut CNC software, the Input Line Status dialog displays "OPEN" for a
high-level input voltage, or open switch, and "CLOSED" for a low-level input voltage
or closed switch.
The input lines are all optically isolated. Jumpers J84 and J85 enable you to choose
between the internal power of the Signal Generator and isolated power from an
external source. Both jumpers must be set on the same pair of pins (either both must
be on pins 1 and 2 or both must be on pins 2 and 3).
Internal Power- This is the most convenient option and works well for most
applications, but negates some of the signal isolation. When JP84 shorts pins 1
and 2, OPT VCC gets its power from the Internal 5V power source. When JP85
shorts pins 1 and 2, OPT GND is directly connected to the Internal GND.
External Isolated Power
For the best noise immunity, connect an external 5V-24V power supply to the
LED side of the optical couplers. When JP84 shorts pins 2 and 3, OPT VCC gets
its optically isolated power from the TB-VCC. When JP85 shorts pins 2 and 3,
OPT GND is directly connected to the TB-GND.
Choose only one of the following methods to supply power:
1. Connect a power source to the TB 40 screw terminal.
2. Connect a power source through pins 23 and 25 of the DB-25 connector.
If you are providing an external voltage through pins 23 and 25 of the DB25
Motor Signal connector or via TB-40, then you must have both JP84 and
JP85 jump pins 2 and 3, OTHERWISE SEVERE DAMAGE COULD
RESULT.
BE VERY CAREFUL WHEN DOING ANY WIRING. IMPROPER
WIRING WILL DAMAGE THE SIGNAL GENERATOR.
Input lines 1, 2, 3 & 4 are also connected through pins 15, 16, 17 & 18 respectively of
the Motor Signal connector, and input lines 5, 6, 7 & 8 are also connected through
pins 5, 6, 7 & 8 respectively of the Motor Signal connector. This makes it convenient
to send any signals from an external motor driver box, such as limit lines or servo
position error signal, back to the Signal Generator through the DB25 cable without