Using Intelligent Output Terminals - Hitachi SJ100 Instruction Manual

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Using Intelligent Output Terminals

Using Intelligent Output Terminals
The intelligent output terminals are programmable in a similar way to the intelligent
input terminals. The inverter has several output functions that you can assign individu-
ally to three physical logic outputs. Two of the outputs are open-collector transistors, and
the third output is the alarm relay (form C – normally open and normally closed
contacts). The relay is assigned the alarm function by default, but you can assign it to
any of the functions that the open-collector outputs use.
Sinking Outputs,
Open Collector
The open-collector transistor
outputs can handle up to
50mA each. We highly
recommend that you use an
external power source as
shown. It must be capable of
providing at least 100mA to
drive both outputs at full load.
To drive loads that require
more than 50mA, use external
relay circuits as shown below.
Sinking Outputs,
Open Collector with
External Relays
If you need output current
greater than 50mA, use the
inverter output to drive a small
relay. Be sure to use a diode
across the coil of the relay as
shown (reverse-biased) in
order to suppress the turn-off
spike, or use a solid-state
relay.
SJ100 Inverter
Open collector outputs
Logic output
common
CM2
–
+
Load
SJ100 Inverter
Open collector outputs
Logic output
common
CM2
–
+
RY
12 11
Load
12 11
RY