Chapter 5 Main Circuit Terminals MS300 (High Speed Model) Remove the front cover The front cover shall be removed before connecting the main circuit terminals and control circuit terminals. Removing the cover acc. to the figure below. The figure below shows Frame B model for example. Removing the cover on other frame sizes is similar. Press the clip on both sides, and take out the front cover by rotating. 5-3 Terminals for connecting DC reactor, external brake resistor and DC circuit These are the terminals for connecting the DC-reactor to improve the power factor and harmonics. At delivery they are shorted by a jumper. Please remove it before connecting the DC reactor.
The jumper must be fastened tight when it does not connect DC reactor, use DC+/+1, +2/B1 to execute common DC bus, or connect with brake resistor, otherwise the drive might lose power or the terminals will be broken. DC reactor (optional) DC+/+1 +2/B1 Connect a brake resistor in applications with frequent deceleration, short deceleration time, too low braking torque or requiring increased braking torque. Brake resistor (optional) +2/B1 B2 The external brake resistor should connect to the terminals [+2 / B1], [B2] of AC motor drives. DO NOT short circuit or connect a brake resistor directly to DC+/+1 and DC-, +2/B1 to DC- otherwise the drive will be damaged.
DC+ and DC- are to be connected in common DC bus applications, please refer to Chapter 5-1(Main Circuit Terminal) for the wiring terminal specification and the wire gauge information.