Chapter 2 Wiring
2.2.3 X1 terminal interface type
The followings introduce the X1 various interface circuits and the wiring ways with the host-controller.
1. Digital input interfaces (C1)
For carrying on a control, the digital input interface circuit can be constructed by switch, relay,
open-collector triode, and photo-coupler and so on. To avoid contacting problem the relay must be chosen with
low current operation. External voltage is in the range of DC12V~24V.
C1-1:Switch input
C1-2:Open collector triode
2. Digital output interfaces (C2)
The digital outputs use Darlington photo-coupler. It can be connected with relay, photo-coupler. Matters of
note are:
z Inverting the polarity of DC power source, which is provided by the user, can cause the servo driver damage.
z The maximum voltage of external DC power supply is 25V, the maximum output current is 50mA, and the
total current for three channels is not in excess of 100mA.
z When using relay like inductive loads, a free-wheel diode must be connected with the inductive load in
parallel. If the diode connects in wrong direction can cause damage to the output circuit.
z Owing to the low level of output is approximately 1V and cannot satisfy the TTL low-level request,
therefore cannot directly connect with the TTL circuit.
C2-1:Relay
C2-2:photo coupler
Relay
DC5V~24V
DO1 4
DO2 17
DO3 5
Servo Drive
Max Output 50mA
DOCOM 18
0V
z freewheel diode must be connected.
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