Bus Power Enable/Emergency Stop

Quad Amp Hardware Reference Manual

CAUTION:

Any wiring should be attempted only after the drive has been isolated from the main AC supply and 10 to 12 minutes has elapsed to allow the internal bus capacitors to discharge.

The normally open (NO) Main AC Contactor auxiliary contacts must be wired and connected to Connector C1 pins 1 and 2, otherwise the Quad Amplifier will not power up. Connector C1 is located on the top of the Quad Amplifier (See Figure 9)

Shunt and Bus

Resistor terminals are provided so that the user can connect an external shunt resistor to the Quad Amplifier (See Figure 10). The shunt resistors should be a resistive (non-inductive) load of appropriate power and voltage rating for the bus and the regenerative load. External shunt resistors are available from Delta Tau as Quad Amplifier Acc-4. These resistors (two 4.25 ohm, 1400W resistors for 230 VAC operation and three

4.25ohm, 1400W resistors for 380/460 VAC operation), when connected in series (8.5 ohms total), will dump over 45 amps.

Bus

Along with the BUS- terminal, these terminals may be used to power external servo amplifiers. Consult Delta Tau Data Systems Technical Assistance for information concerning external servo amplifiers. .

Bus Filter/Indicator

The bus filter/indicator board is mounted to the Bus+ and Bus- power bars, which are located between Axis 1 and 3 and Axis 2 and 4 output blocks inside of the Quad Amplifier. The bus filter/indicator board is equipped with a neon light that illuminates when bus voltage is present. If the Main AC Power is turned off, the neon light will stay lit until the bus voltage discharges to about 80 VDC.

Motor Wiring

The motor cable wire gauge for each axis must be sized to handle the continuous output current of the axis to which it is connected.

Motor Over-Temp Sensor

The output pins of the 9-pin DIN connector, located on the end panel of the Quad Amplifier, must be connected to the motor over-temp switches. If this connector is not connected to the motor over-temp switches, it must be jumpered with a Delta Tau supplied termination connector for normal Quad Amplifier operation.

Jumpers, Potentiometers, Test Points, and LEDs

There are configurable jumpers, potentiometers, test points, and LEDs on the circuit boards inside the Quad Amplifier. The jumpers are factory set to each customer’s specifications and usually do not need to be changed. Figures 10 through 12 show the locations of these jumpers, potentiometers, test points, and LEDs. The following tables list the default jumper settings, the Soft Start board potentiometer factory settings and test point voltages, describe the LED indications for each board.

Installation

3Ax-602646-xUxx specifications

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