Martin Audio Installed System Digital Management Processor Engineer 418, Руководство пользователя

Страница: 23 / 38

ENGINEERHARDWAREMANUAL1.1[1].doc 21
3.7 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.
3.8 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 818 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