Using Intelligent Output Terminals - Hitachi WJ200-001S Instruction Manual

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
individually to two physical logic outputs. One of the outputs is an open-collector
transistor, and the other 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 output uses.
Sinking Outputs, Open Collector
The open-collector transistor
output can handle up to 50mA. We
highly recommend that you use an
external power source as shown at
the right. It must be capable of
providing at least 50mA to drive
the output at full load. To drive
loads that require more than
50mA, use external relay circuits
as shown below right.
Sinking Outputs, Open Collector
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.
WJ200 Inverter
Logic output
common
CM2
-
+
WJ200 Inverter
Logic output
common
CM2
-
+
451
12 11
Load
11
12
RY