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Pre-Out (Preamplier only)
The Pre-Out connection of the Preamplier connects to a separate power
amplier using the supplied Euroblock connector. If the connected power
amplier supports balanced inputs, this is the preferred connection meth-
od. Use good quality interconnect cables with proper shielding for best
performance.
RS-232 connectors
The onboard RS-232 ports (T1, R1, T2, R2) can be used for one- or two-
way communication with external RS-232 compatible devices, or used
alternatively as IR ports. T1 and R1 are used as defaults to control the
amplier. T2 and R2 are used when daisy chaining multiple units or when
using the unit as LAN to RS-232 gateway.
IO Connectors
The amplier has four I/Os available. These are multifunctional digital inputs
or outputs which can be congured for different purposes. The I/Os can be
congured for general purpose functionality with control from either LAN
or RS232RS-232 connections. For example, it is possible to connect an
external control keypad, PIR (movement) sensor, keyboard lock, or extra
relays to the amplier with everything controlled remotely from a connected
control system.
The ports are not potential free; you may need external relays if you need
to prevent ground loops. When used as outputs, the ports are active low.
When indicated as active, the pins are tied to GND.
LAN connector
The LAN connector is used to connect the amplier to the local area net-
work. The LAN interface enables control of the amplier either from a con-
nected control system or the built in web interface.
On the Preamplier, the LAN interface also supports Power over Ethernet
(PoE) function. The Preamplier can be powered from a PoE enabled switch
or PoE injector using only the LAN connection.
The LAN port features auto MDI-X which means that you can connect the
LAN port directly to a control system without the need for a switch.
There are two LEDs on the connector with the following indication:
Color Off On Blink
Yellow No link Link Activity
Green 10Mbit 100Mbit
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