ENGINEERHARDWAREMANUAL1.1[1].doc
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2.7
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 the Martin Audio Engineer
418 and the PC are on the same power distribution line to avoid data errors.
2.8
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 refer to the Engineer software manual.
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.
Conductor cross section solid min.
0.2 mm
2
Conductor cross section solid max.
2.5 mm
2
Conductor cross section stranded min.
0.2 mm
2
Conductor cross section stranded max.
2.5 mm
2
Conductor cross section stranded, with ferrule
without plastic sleeve min.
0.25 mm
2
Conductor cross section stranded, with ferrule
without plastic sleeve max.
2.5 mm
2
Conductor cross section stranded, with ferrule with
plastic sleeve min.
0.25 mm
2
Conductor cross section stranded, with ferrule with
plastic sleeve max.
2.5 mm
2