Hitachi hitachi series inverter 用户手册
40
The alarm relay output can be configured in two main ways:
•
Trip/Power Loss Alarm – The alarm relay is configured as normally closed (
C036
=
01
)
by default, shown below (left). An external alarm circuit that detects broken wiring also
as an alarm connects to [AL0] and [AL1]. After powerup and short delay (< 2 seconds),
the relay energizes and the alarm circuit is OFF. Then, either an inverter trip event or
an inverter power loss will de-energize the relay and open the alarm circuit
as an alarm connects to [AL0] and [AL1]. After powerup and short delay (< 2 seconds),
the relay energizes and the alarm circuit is OFF. Then, either an inverter trip event or
an inverter power loss will de-energize the relay and open the alarm circuit
•
Trip Alarm – Alternatively, you can configure the relay as normally open (
C036
=
00
),
shown below (right). An external alarm circuit that detects broken wiring also as an
alarm connects to [AL0] and [AL2]. After powerup, the relay energizes only when an
inverter trip event occurs, opening the alarm circuit. However, in this configuration, an
inverter power loss does not open the alarm circuit.
alarm connects to [AL0] and [AL2]. After powerup, the relay energizes only when an
inverter trip event occurs, opening the alarm circuit. However, in this configuration, an
inverter power loss does not open the alarm circuit.
Be sure to use the relay configuration that is appropriate for your system design. Note that
the external circuits shown assume that a closed circuit = no alarm condition (so that a
broken wire also causes an alarm). However, some systems may require a closed circuit =
alarm condition. In that case, then use the opposite terminal [AL1] or [AL2] from the ones
shown.
the external circuits shown assume that a closed circuit = no alarm condition (so that a
broken wire also causes an alarm). However, some systems may require a closed circuit =
alarm condition. In that case, then use the opposite terminal [AL1] or [AL2] from the ones
shown.
N.C. contacts (
C036
=
01
)
N.O. contacts (
C036
=
00
)
During normal operation
When an alarm occurs or
when power is OFF
During normal operation
or when power is OFF
When an alarm occurs
Power
Run Mode
AL0-AL1
AL0-AL2
Power
Run Mode
AL0-AL1
AL0-AL2
ON Normal Closed Open
ON Normal Open Closed
ON Trip Open
Closed
ON Trip Closed
Open
OFF – Open
Closed OFF – Open
Closed
AL1
Power
supply
Load
AL0
AL2
AL1
Power
supply
Load
AL0
AL2
AL1
Power
supply
Load
AL0
AL2
AL1
Power
supply
Load
AL0
AL2