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Description

The HP Bus Bar box is a power distribution system featuring an internal busbar that provides a common connection between OP8110 amplifiers and up to two external DUTs.

Front and Rear Panels

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Configuration

• 6 × rear-panel connection points (three-phase and neutral) to connect from the OP8110 amplifiers to the internal common busbar

• 2 × front-panel connection points (three-phase and neutral) to connect separate external DUTs to the common internal busbar (fused at 100A per line)

Controls, Indicators & Connection Points

Front-Panel Controls & Indicators

• 2 external DUT control/interface sections (DUT 1, DUT 2)

  • 3W + N banana jack terminals

  • Contactor control button

    • Start - Enables DUT connection

    • Off - Disables DUT connection

  • Status Indicator LED

    • Flashing – Enable active, waiting for remote command

    • Solid ON – DUT connection enabled (contactor closed)

    • OFF – DUT connection disabled (contactor opened)

• 24V ON - Auxiliary power LED indicator

• BUS ON - LED indicator (ON when at least 60V_RMS is detected on any line voltage (L-L))

Rear-Panel

• 6 sets of 3W + N banana jack terminals for connection with OP8110 amplifiers

• DI - DB37 connector, digital inputs for controlling the contactors

• DO - DB37 connector, digital outputs forwarded from unused digital inputs

• AO1 - DB37 connector, analog output voltage measurement signals

• AO2 - DB37 connector, analog output current measurement signals

• ETH - RJ45 plug for ethernet cable connection

• P1 (24VDC) - connector, 24V supply - supports daisy-chaining with other compatible boxes

• ETH/DIO - toggle switch, selects the source of the internal contactor control, either Ethernet or digital I/O.

• GND - Voltage Reference / Functional Ground banana jack

• Protective Earth (PE) grounding stud

Contactor Control

Each DUT output is switched by contactors, which can be remotely controlled via Ethernet or digital I/O signals, selectable using the associated toggle switch on the rear panel. In addition to the remote signal, the physical local Enable button must also be active for the contactor to close, providing an extra layer of safety.

Protection & Safety

• Fuse protection per DUT output

• Contactor and logic interlock prevent unintended energization

• Compatible with E-Stop and enclosure interlock circuits

• All exposed metal parts grounded for safety and continuity

Specifications

• Max voltage: 600 V_AC / 450 V_DC

• Max continuous DUT terminal current: 100 A_RMS per line

• Max continuous amplifier terminal current: 14 A_RMS per line

• Control supply: 24 V_DC

Simplified Wiring Diagram

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Digital IO Connectors

These female DB37 connectors are provided to interface with the digital outputs of an IO card inside a simulator. The digital inputs on DI connector allow to switch ON (logical '1') or OFF (logical '0') the DUT contactors when the DUT Enable button is activated. The following table lists the pin assignments of this connector:

DI Connector				Open
DB37F	Pin assignment	DB37F	Pin assignment
1	Validation Bit	20	Validation Bit Return
2	DUT 1 Command	21	DUT 1 Return
3	DUT 2 Command	22	DUT 2 Return
(all other pins are forwarded to the DO connector)
18	24V (supplied by the busbar)	37	GND

 DO connector can be used to access the unused digital outputs of the IO card, by daisy chaining another equipment to the HP BUS BAR. Please contact your OPAL-RT representative if you require further information on this feature.

Analog Output Connectors

Two female DB37 connectors provide the voltage (AO1) and current (AO2) measurement signals.

Analog Output 1 Connector (Voltages)	Analog Output 2 Connector (Currents)

Analog Output 1 Connector (Voltages)	Analog Output 2 Connector (Currents)
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