GSK980TDc Turning CNC System User Manual
322
Ⅲ
Connection
Fig. 2-29 Circuit for digital volume output module
The logic signal OUTx output from the main board is sent to the input terminal of inverter
(ULN2803) via a connector. And there are 2 types for nOUTx output: 0V, or high impedance. Its
typical application is as follows:
z
To drive LED
A serial resistance is needed to limit the current (usually 10mA) that goes through the LED by
using ULN2803 output to drive LED, which is shown in Fig. 2-30:
Fig. 2-30
z
To drive filament indicator
An external preheat resistance is needed to decrease the current impact at power on by using
ULN2803 output to drive filament indicator, and this resistance value should be within a range that the
indicator cannot be lighted up as shown in Fig. 2-31:
+24V
CNC side
Machine
side
ULN2803
output
+24V
Machine
side
CNC side
Relay
ULN2803
output
Fig. 2-31 Fig.2-32
z
To drive inductive load (such as relay)
To use ULN2803 output to drive an inductive load, it requires to connect a freewheeling diode
near the coil to protect output circuit and reduce interference as shown in Fig. 2-32:
The significances of the output signal of I/O interface are defined by PLC program, these signals
include S1
~
S4 (M41
~
M44), M3, M4, M5, M8, M10, M11, M32, TL-, TL+, U00
~
U05, DOQPJ,
DOQPS, SPZD signals etc.. And their common terminal is +24V.
Summary of Contents for GSK980TDc
Page 17: ...I Programming ...
Page 18: ...GSK980TDc Turning CNC System User Manual ...
Page 190: ...GSK980TDc Turning CNC System User Manual 172 Ⅰ Programming ...
Page 191: ...Ⅱ Operation Ⅱ Operation ...
Page 192: ...GSK980TDc Turning CNC System User Manua Ⅱ Operation ...
Page 326: ...GSK980TDc Turning CNC System User Manual 306 Ⅱ Operation ...
Page 327: ...Ⅲ Connection Ⅲ Connection ...
Page 328: ...GSK980TDc Turning CNC System User Manual Ⅲ Connection ...
Page 470: ...GSK980TDc Turning CNC System User Manual 448 Ⅲ Connection ...