Data Sheet

Use of Safety Contactor for Critical Applications

GBL2xxx Motor Controller Datasheet 5

Note 3: Insert a high-current diode to ensure a return path to the battery during regenera-

tion in case the fuse is blown.

Note 4: Optionally ground the VMot tabs when the controller is Off if there is any concern

that the motors could be made to spin and generate voltage in excess of 60V.

Note 5: Connect the controller’s bottom plate to a wire connected to the Earth while the

charger is plugged in the AC main, or if the controller is powered by an AC power supply.

Note 6: Beware not to create a path from the ground pins on the I/O connector and the

battery minus terminal.

Single Channel Wiring

On the Single Channel GBL26xxS, the each of the motor wire must be connected to both

output tabs of the same letter, as shown in Figure 3, below. Use the Encoders and/or Hall

sensors of Channel 1 for operation.

FIGURE 3. Single Channel Wiring Diagram

Important Warning

This wiring must be done only on the single channel version of the controller. Paral-

leling the wires on a dual channel product will cause permanent damage. Verify that

your controller is an GBL2660S before you wire in this manner.

Use of Safety Contactor for Critical Applications

An external safety contactor must be used in any application where damage to property or

injury to person can occur because of uncontrolled motor operation resulting from failure

in the controller’s power output stage.