EURA SD20-G Series, Manual

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SD20-G Series
69
4.3.4 Digital input signal and functions
Signal name Pin No. Function
Program
mable
input
terminal
DI1 CN3-18
DI1-DI8 are digital input terminals, input mode is
ON/OFF signal. Please refer to 8.1.7 DI/DO for the
detailed function.
DI input pulse frequency range is 0~3KHz
DI2 CN3-19
DI3 CN3-20
DI4 CN3-21
DI5 CN3-22
DI6 CN3-38
DI7 CN3-39
High-speed DI
DI8+ CN3-13
DI8 is a high-speed DI channel. When DI8 is used, the
input pulse frequency range is 0-200khz, and the
pulse duty ratio cannot be lower than 20%.
DI8- CN3-14
Signal name Pin No. Function
Program
mable
output
terminal
DO1+ CN3-9
DO1-DO4 and ALM are DO output terminals, output
mode is ON/OFF signal. Please refer to 8.1.7
DI/DO for the detailed function.
DO1- CN3-10
DO2+ CN3-26
DO2- CN3-11
DO3+ CN3-41
DO3- CN3-42
DO4+ CN3-32
DO4- CN3-31
ALM+ CN3-7
ALM- CN3-8
Signal name Pin No. Function
Internal
24V
+24V CN3-29 24V power supply, range is 20V-30V
CM CN3-30 Reference terminal
1) Digital input circuit
DI1~DI8 input terminals circuit is bidirectional photocoupler isolating circuit. The common terminal of
photocoupler is GP terminal which is used to connect to power supply or grounding for power supply. Please
refer to fig 4-4-1 and 4-4-2. Please select external DC power supply to supply the primary voltage of
photocoupler in order to decrease the interference to internal circuit. DI8 is high-speed photoelectric channel,
which is high-speed DI terminal. Input type of DI channel is as below:
(1) Passive contactor