Amplifier board

Operating instructions

Amplifier board (12 channels)

SKU: 050100
Category: Electrical safety
Manufacturers: FSB Orgelbau

Amplifier board with 12 channels

Operating voltage: 12-24V, current per output max. 1A

Housing for DIN rail

Former Laukhuff catalogue number: 8 640 02

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Description

The Laukhuff amplifier boards have been acquired by FSB Orgelbau. They are the universal tool for the control of pallet solenoids with optical contacts, the control of auxiliary electrical chests or the refurbishment for electrical safety by using low currents from the console and fusing of the outputs. Each of the compact modules supplies 12 notes or stops.

The boards are supplied in a housing for easy mounting on DIN rails and can thus be conveniently arranged in the required number.

Electrical safety:

The amplifier board uses two redundant safety technologies: each output is electronically current-limited and short-circuit-proof. In the event of a defect in the wiring or the connected magnet, only a maximum current of 1A will flow. In addition, there is a physical 2A fuse in each of the 12 outputs for the unlikely event of a complete electronic failure. Even spare fuses are integrated on the compact circuit board.

Spark suppression:

Often the question arises whether the installation of spark supressing devices (such as diodes) is necessary when using amplifier circuits if the connected solenoids are not yet equipped with them. Two effects of such components must be taken into account:

a) The amplifier circuit is sufficient as a spark suppressor for the key contact.
Breakaway sparks at key contacts, which in the long run lead to wear of the contact needles, are caused by the induction of high-voltage pulses in the solenoid coil when the magnetic field collapses when the current is switched off.
Since, after the amplifier circuit has been installed, only a small control current flows through the key contact to the input of the amplifier circuit and there is no longer a direct connection to the solenoid coil, no more sparks occur at the key contact.

b) The outputs of the amplifier circuit are designed for operation with magnets without spark suppression. The components used have integrated surge protection diodes. No additional measures are required for electrical functional safety.
Nevertheless, the retrofitting of varistors or suppressor diodes may be useful to eliminate electromagnetic interference that can occur when the induction voltage pulses from the magnets pass through the organ wiring to the amplifier board. However, this requires these components to be connected as close as possible to the magnets. Retrofitting spark suppressors at terminal boards or similar (more accessible) places is pointless in this respect.

Item information	Value
Shipping weight:	0.14 kg
Item weight:	0.10 kg