Stagehand Pro 4: Motor and Brake Output

The Motor / Brake output receptacle combines power for a motor and two brakes into a single, 12-pin connector.

The receptacle has a current rating high enough for 5hp, 10hp, and 20hp machines. However, output capacity is limited by the Variable Frequency Drive (VFD) inside each model of Stagehand Pro.

Motor Output

The motor output is intended for connection to a 3-phase, inverter-duty, induction motor. The attached motor should be wired for 230VAC power, and suitable for variable frequency from 0.5Hz-60Hz.

Pin #	Purpose
1	Motor U
2	Motor V
3	Motor W
4	Not used

Motor Brake Output

The Motor Brake power circuit is 208/230VAC 1P with a fixed frequency that matches the input power source (typically 60Hz in the United States and 50Hz abroad).

The Motor Brake power circuit is energized ~60ms prior to motion. It should be used to release a quick-acting mechanical brake (typically on the high-speed side of a powertrain). Power is applied during motion and removed when motion stops. The mechanical brake should be a spring-set safety brake that will hold the load when power is removed.

In addition to the power circuit (pins 5 & 6), there is a potential-free / dry-contact circuit that is switched on pins 7 & 8. During motion, there is continuity between pins 7 & 8. When motion stops, the circuit is opened between pins 7 & 8. This circuit can be used to interrupt the DC power on some safety brakes to decrease stopping time and is referred to as the Fast Switch Loop.

Not all brakes support the fast-brake switching circuit on pins 7 & 8, and not all scenarios require it. This is an optional connection.

Pin #	Purpose
5	Motor Brake L1 - 208/230VAC 6A Max
6	Motor Brake L2 - 208/230VAC 6A Max
7	Motor Brake - Fast Switch Loop
8	Motor Brake - Fast Switch Loop

Load Brake Output

The Load Brake power circuit is 208/230VAC 1P with a fixed frequency that matches the input power source (typically 60Hz in the United States and 50Hz abroad).

The Load Brake power circuit is energized ~500ms prior to motion. It should be used to release a slow-acting mechanical brake (typically on the low-speed side of a powertrain). Power is applied during motion and removed when motion stops. The mechanical brake should be a spring-set safety brake that will hold the load when power is removed.

In addition to the power circuit (pins 9 & 10), there is a potential-free / dry-contact circuit that is switched on pins 11 & 12. During motion, there is continuity between pins 11 & 12. When motion stops, the circuit is opened between pins 11 & 12. This circuit can be used to interrupt the DC power on some safety brakes to decrease stopping time and is referred to as the Fast Switch Loop.

Not all brakes support the fast-brake switching circuit on pins 11 & 12, and not all scenarios require it. This is an optional connection.

Pin #	Purpose
9	Load Brake L1 - 208/230VAC 6A Max
10	Load Brake L2 - 208/230VAC 6A Max
11	Load Brake - Fast Switch Loop
12	Load Brake - Fast Switch Loop

The 6A Max current rating for the Motor Brake and Load Brake outputs is a combined rating. The power for both brake circuits runs through a single 6A circuit breaker on the front panel of the Stagehand Pro 4.