To install a CDBR-type braking unit, connect terminal +3 on the drive to terminal + on the braking unit, and connect terminal - on the drive to terminal - on the braking unit. Terminal +2 on the drive is not necessary for CDBR-type braking unit connections. Set L8-55 = 0 [Internal DB TransistorProtection = Disable]. Note: To install a CDBR-type braking unit to the drive models 2004 to 2138 and 4002 to 4168 that have a built-in braking transistor, connect drive terminal B1 to terminal + on the braking unit. A junction terminal is necessary to connect a braking unit (CDBR-series) to drive models 2169, 2211, 4140, or 4168. To wire the braking unit, install a junction terminal that can connect to wires in the range specified for the drive, peripheral devices, and options. This table shows recommended junction terminals. Contact Yaskawa or your nearest sales representative for more information about selection and installation of the junction terminal. Drive Model Junction Terminal Model Manufacturer: Mibu Denki Industrial Co., Ltd. 2169, 4140, 4168 DTK-200N × 2P1 2211 DTK-300N × 2P1 Figure 1. Install a Braking Unit: CDBR-Type/Braking Resistor Unit: LKEB-Type 1 The junction terminal must have two or more poles.