2-5
2-3-3 Connecting the control terminals
Function descriptions of the control terminals are shown in Table 2-3-3.
Table 2-3-3
Terminal
marking
Name of terminal Function description
i1, i2 DB driving signal input terminals
Connecting the DB drive signal wire of the unit on the
slave unit (∗1) side when using the units in parallel
o
1,
o
2
DB driving signal output terminals
Connecting the DB drive signal wire of the unit on the
master unit (∗2) side when using the units in parallel
1, 2 DB unit lump-sum alarm output
Outputting the alarm for overheat and blown fuse of
DB driving IGBT and braking resistor, and conduction
abnormal of DB driving IGBT
CN5, CN6
Connectors for power supply of
option fans
Connecting power supply of option fans when installing
them
(∗1) The unit operating by receiving DB driving signal from the unit on the master side
(∗2) The unit operating by detecting DB operation level by itself from the link circuit voltage
(1) DB driving signal input terminals (i1 and i2)
DB driving signal output terminals (
o
1 and
o
2)
① These terminals connect between master and slave
when using 2 DB units.
② To reduce the noise effect from outside, use twisted
wires as short as possible (1.5m or less).
③ Change over the settings of master and slave in the DB
units with SW1 on the PCB as shown in Fig. 2-3-3.
④ When using single DB unit, set the SW1 as shown in a).
⑤ Do not short-circuit not used terminals.
(2) DB unit lump-sum alarm output (1 and 2)
① Connect the terminals of the DB units and braking
resistors in series in the order of 1212 to the
contact input terminals of the inverter which are
assigned external alarm input to.
When used a short-circuit conductor on the contact
input terminals to be connected on the inverter side,
remove the short-circuit conductor.
(3) Connectors for power supply of option fans (CN5 and
CN6)
① When using option fans, the power supply lines of the
fans are connected to these terminals.
② Connectors CN5 and CN6 have a same function.
③ Do not short-circuit these connectors because of power
supply connection.
(4) Others
① Perform the wiring of the control terminals separating
from the wiring of the main circuit as far as possible.
Otherwise, malfunction by noise may be caused.
② Fix the control wiring inside the unit so as not to directly
contact with a live part of the main circuit (e. g. main
circuit terminal block).
③ The parallel connection of the DB units is up to two units.
When necessary to connect 3 or more DB units, contact
us separately.
WARNING
• Since the insulation of control cable is generally not of reinforced insulation,
high voltage may intrude into the control signal if insulation sheath is broken by
any cause.
Electric shock may result.
CAUTION
• A noise is generated from inverter, motor,wiring. etc. Take care on malfunction
of sensors and devices in the surroundings.
• Be sure not to move the setting of the variable resistor VR1 on the control PCB
since it has been adjusted.
Accident may result.
1
2
3
1
2
3
SW1
SW1
SW1
SW1
the terminals o1 and o2(Master side)
the terminals i1 and i2(Slave side)
Fig. 2-3-3 Changeover of SW1
Switch
ＳＷ１
CN6
CN5
block
Fig 2-3-4 Control PCB
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