TECPRO PB752 Power booster, dual circuit

PS751, PS753 Power Supplies

Free-standing, single & multi circuit power supplies

Tecpro Series 2 Power Supplies provide 24V DC to power small to medium sized intercom systems while terminating the audio lines with the correct impedance, enabling full duplex (simultaneous, two way) conversations to take place over extended cable runs. The 2A supply is capable of driving up to forty BP531 beltpacks and is protected by a compact, robust, extruded aluminium case designed to withstand the rigours of the live events environment. They are fully compatible with older Tecpro designs.

Series 2 power supplies are protected against short circuit and over-temperature. Protection is electronic and automatic and no resetting is necessary following removal of a fault condition. This new generation of PSU can be operated world-wide without the need to change power supply settings.

Features

• Free-standing, compact
• Tough, extruded aluminium case
• Universal power supply operates world-wide without resetting
• Short circuit and overload protection with indication
• Automatic reset after short circuit
• Supports up to 40 Tecpro BP531 beltpacks
• 3-Pin XLR system connectors are compatible with standard mic cables
• Three independent, linkable intercom circuits (PS753 only) with indication
• 'Power ON' and 'Overload' indication
• Compatible with previous generation Tecpro designs

Two versions are available. The PS751 offers single circuit operation only and is ideal for schools and small venues where simplicity of operation is essential. User stations are linked to the power supply via four parallel male XLR connectors on the end panel. A green LED indicates 'Power ON'.

The PS753 is similar but offers three independent intercom circuits which may be linked to create either one or two circuits. It is suitable for smaller theatres and rental companies who may need separate circuits to allow members of the sound crew, for example, to talk together without overhearing the lighting crew and vice versa. User stations are linked to the unit via three male XLR connectors (one per circuit). Two yellow LEDs indicate circuit linking.

All three circuits operate independently (unless linked), and draw their power from the 2A DC supply. A green LED indicates 'Power ON'.

If there is a need for a director to talk to operators on more than one intercom circuit either separately or together, then a Tecpro Master Station should be considered.

Technical Specification

PB752 Power Booster

Free-standing, dual circuit power booster

The Tecpro Series 2 PB752 Power Booster provides a simple method of supplementing the 24V DC system power within existing Intercom systems of any size when there is insufficient drive current available. This may be due to power loss in long cable runs or because too many outstations and loudspeaker stations are connected to the system. To avoid altering the system impedance set by the main power supply, the PB752 does not terminate the line and no additional isolating components are required. Maximum available current is 2A and is shared between two outputs to facilitate connection to larger two circuit intercom systems. When connected to a single circuit only, the full 2A is available for that circuit. The Power Booster is compatible with older Tecpro designs.

Features

• Free-standing, compact
• Tough, extruded aluminium case
• Universal power supply operates world-wide without resetting
• Short circuit and overload protection with indication on each intercom circuit
• Automatic reset after short circuit
• 3-Pin XLR system connectors compatible with standard mic cables
• 'Power ON' indication
• Compatible with previous generation Tecpro designs

The PB752 can be linked to an intercom system at any point. If cable runs are long, the farthest point where voltage drop off is worst would typically be the best connection point.

The Power Booster is protected against short circuit and over-temperature. Protection is electronic and automatic and no resetting is necessary following removal of a fault condition. The unit can be operated world-wide without the need to change power supply settings.

Technical Specification

PS754 Power Supply/Booster

Rack mounting, dual-circuit, power supply or booster

The Tecpro PS754 provides two channels of 24V DC system power for Tecpro intercom systems and has two modes of operation. It may be used as either the principal system power supply for a system, when it terminates the audio lines with the correct impedance, or to boost system power where the existing power supply is under-powered, where termination is not required.

Features

• Compact 1U format
• Single male XLR3 and female XLR3 connector per circuit for cable loop-through
• Universal power supply
• Short-circuit and overload protection with indication on each intercom circuit
• Compatible with previous generation Tecpro designs

In 'Power Supply' mode, it provides two independent intercom circuits each rated at 1.1A each. This is sufficient to power 22 BP511 belt-packs per circuit. Circuit B can be linked to circuit A to provide a single 'super' circuit. The link switch is recessed in the front panel to avoid accidental operation. A 'Link' LED indicator is provided. On the rear, two pairs of male and female XLR connectors are wired in parallel, one pair for each of the two circuits. Switching from 'Power Supply' mode to 'Power Boost' disables the audio termination on circuits A and B. The rear mounted 'mode' switch is recessed to avoid accidental operation. When 'Power Boost' mode is selected a 'Termination Off' LED illuminates on the front panel.

Circuits A and B have dedicated power supplies with short-circuit protection. Protection is electronic and automatic and no resetting is necessary following removal of a fault condition. As the supplies are independent, in the event of a cable fault temporarily disabling one circuit, the other circuit will continue to operate uninterrupted. When a fault is registered, the 'Overload' LED for that circuit will illuminate until the condition is removed.

Technical Specification