Maxsine EP3 AC Series, User Manual

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2.2 X1 terminals for control signals
19
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:
 Inverting the polarity of DC power source, which is provided by the user, can cause the
servo driver damage.
 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.
 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.
 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