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Martin Audio ENGINEER Guía de usuario Pagina 18

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Engineer 418 & 818 User Manual Page 18
Connecting RS-232
On the front of the device is the RS-232 port for remote control and configuration of the device with a PC with
the supplied Windows® Engineer software. To connect the Martin Audio Engineer to a PC use the supplied
RS232 cable only. This cable is 1:1 connected, fully wired, one side fitted with a Male DB9 connector, other
side a Female DB9 connector.
If a longer cable is required please observe that the maximum operational cable length is typically 45 feet.
Warning: if the users’ PC uses a grounded power supply, make sure that the Martin Audio Engineer 418 and
the PC are on the same power distribution line to avoid data errors.
Connecting RS-485
On the rear of the device, next to the audio inputs, is the RS-485 port on a RJ-45 connector, used to connect
the Martin Audio Engineer 418 to the Martin Audio Engineer Remote or to an external third party control unit.
(e.g. Crestron/AMX). For communication protocol please see the appropriate Chapter
The maximum operational cable length is typically 1000 ft. on CAT-5 (Unshielded Twisted Pairs) cable.
The RS-485 connection includes a +5V power line for powering the Engineer Remote. (Please refer to the
wiring scheme in the chapter “Engineer Remote”)
Warning: if an external third party control unit is used with the RS-485 port, this device must have a double
isolated power supply.
Power Requirements
The Martin Audio Engineer 818 must be connected to a 100-240V AC 50-60Hz electrical power supply, with a
single phase, neutral and ground connection. Both the neutral and the phase of the power supply (building
fuse) need to be protected by a fuse with a maximum current of 16A. For safety reasons the Martin Audio
Engineer 818 must be connected to a properly grounded power outlet.
Always use the 3-pin IEC power cord supplied with the Martin Audio Engineer 418.
The power input fuse is located below the 3-pin IEC power input. Do not use a different type of fuse; always
replace a blown fuse with a compatible fuse.
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