YASKAWA A1000 Technical Manual page 429


Installing a Braking Unit: CDBR Type
To install a CDBR type braking unit, connect the drive's B1 terminal (CIMR-A2A0004 through 2A0138 and
CIMR-A4A0002 through 4A0072) or +3 terminal (CIMR-A2A0169 to 2A0415 and CIMR-A4A0088 to 4A1200)
to the positive terminal on the braking unit. Next wire the negative terminals on the drive and braking unit together.
Terminal +2 is not used.
Connect the braking resistor to the CDBRs terminals +0 and -0.
Wire the thermal overload relay contact of the CDBR and the braking resistor in series, and connect this signal to a
circuit that disconnects the main input power supply to the drive in the event of a CDBR or braking resistor overload.
Disable dynamic braking transistor protection by setting L8-55 = 0.
Note: To install a CDBR type braking unit to the drive with built-in dynamic braking transistor (CIMR-A2A0004 through 2A0138
and CIMR-A4A0002 through 4A0072), connect the drive's B1 terminal to the positive terminal on the braking unit. Next wire
the negative terminals on the drive and braking unit together. Terminal B2 is not used.
Figure 8.19
Figure 8.21 Connecting a Braking Unit (CDBR type) and Braking Resistor Unit (LKEB type)

Using Braking Units in Parallel
When multiple braking units are used, they must be installed with a master-slave configuration with a single braking unit
acting as the master. Figure 8.22
Wire the thermal overload contacts relays of all CDBRs and all braking resistors in series, then connect this signal to a
drive digital input. This input can be used to trigger a fault in the drive in case of overload in any of the CDBRs or
braking resistors.
Figure 8.20
Drive
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Braking Unit
(CDBR type)
+ 3 +
Drive
−
−
3
Thermal Relay
Trip Contact
(CIMR-A2A0169 to 2A0415, 4A0088 to 4A1200)
illustrates how to wire braking units in parallel.
Braking Resistor
Overheat Contact
(Thermal Relay Trip Contact)
+ −
3
1
P
− + + 0 − 0
MASTER
SLAVE
1
2
Braking Unit 1
3 4
Cooling Fin Overheat Contact
(Thermoswitch Contact)
Figure 8.22 Connecting Braking Units in Parallel
Braking Resistor Unit
(LKEB type)
+ 0
P
B
− 0
4
Braking Resistor
Overheat Contact
(Thermal Relay Trip Contact)
Braking Braking
2 1 2
Resistor Resistor
Unit Unit
B P B
− + + 0 − 0
MASTER
+15 SLAVE
5
5
1
6
6
2
Braking Unit 2
3 4
Cooling Fin Overheat Contact
(Thermoswitch Contact)
8.5 Installing Peripheral Devices
1
Thermal Overload
Protector Trip Contact
2
Braking Resistor
Overheat Contact
(Thermal Relay Trip Contact)
Braking
1 2
Resistor
Unit
P B
− + + 0 − 0
MASTER
SLAVE
1 5
2 6
Braking Unit 3
3 4
Cooling Fin Overheat Contact
(Thermoswitch Contact)
8
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