YASKAWA L1000A Technical Manual page 319

L 4A0075 to 4A0260) to the positive terminal on the braking unit. Then, wire the negative terminals on the drive and
braking unit together. Terminal +2 is not used.
Connect the braking resistor to CDBR 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 drive
digital input. Use this input to trigger a fault in the drive in case a CDBR or braking resistor overload occurs.
Figure 8.6
Figure 8.6 Connecting a Braking Unit (CDBR type) and Braking Resistor Unit
■
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 8.7
Wire the thermal overload contacts 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 8.7
Drive
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Braking Unit
(CDBR type)
+ 3 +
Drive
−
−
3
Thermal
Trip Contact
(CIMR-L 2A0145 to 2A0415 and L 4A0075 to 4A0260)
illustrates how to wire braking units in parallel.
Braking Resistor
Overheat Contact
(Thermal Trip Contact)
+ 3 −
− + + 0 − 0
MASTER
SLAVE
+15
1
2
Braking Unit 1
3 4
Thermal trip contact
Figure 8.7 Connecting Braking Units in Parallel
Braking Resistor Unit
(LKEB type)
+ 0
P
1
B
− 0 2
4
Braking Resistor
Overheat Contact
(Thermal Trip Contact)
Braking Braking
Resistor Resistor
− + + 0 − 0
MASTER
SLAVE
5
5
1
6
6
2
Braking Unit 2
3 4
Thermal trip contact
8.5 Installing Peripheral Devices
Thermal Overload
Trip Contact
YEA_
TMonly
Braking Resistor
Overheat Contact
(Thermal Trip Contact)
Braking
Resistor
− + + 0 − 0
MASTER
SLAVE
1 5
2 6
YEA_
Braking Unit 3
TMonly
3 4
Thermal trip contact
8
319