RS-485 to RS-485 Data Bus Converter Module
The MSM2927-06-x provides the necessary medium to
convert AI’s CMS proprietary RS-485 serial communications to a
RS-485 serial communication format and vice versa to control
Airshow’s domestic satellite TV system. It is specifically designed
to meet the special requirements of aircraft use.
The “-x” suffix denotes the type of connector utilized;
“-1” = Positronic and “-2” = D-Subminiature.
The following list provides an overview of features for the
q Active device that requires power, ground, and data bus
Specially designed to meet aircraft standards
1. The MSM2927-06-x allows AI’s control equipment (touch Technical Specifications
screens, audio/video controllers, source equipment) that are
attached to AI’s proprietary RS-485 serial data bus to control Electrical Power 850 mA at +28 VDC
Airshow’s SATV via the dedicated RS-485 data bus. Mechanical Dimensions 3.10" x 5.11" x 1.05"
(l x w x h) 7.87cm x 12.98cm x 2.67cm
Installation Guidelines Weight 3.25 lb / 1.47 kg
1. Mounting screws are required to secure the unit. Refer to
outline drawing for mounting hole diameters and
2. All power and ground wires shall be 22 AWG, MINIMUM.
Power ground wires shall be grounded within twelve inches of Drawings Description
the unit. All wires shall be in accordance with 522285 Rev IR1 MSM2927-0x-x Outline Drawing
MIL-W-22759 or equivalent. Twisted shielded cable shall be
in accordance with MIL-DTL-27500 or equivalent. Protect
power wires with circuit breakers or fuses located close to the
electrical power source bus.
3. The MSM2927-06-x is designed to interface with other AI
equipment via AI’s proprietary RS-485 serial data bus. This Document # 530374 – Revision History
data bus allows multiple units to be connected Level Date Description
simultaneously. IR 5/2000 Initial Release
4. AI’s proprietary RS-485 serial data bus shall be implemented
using a twisted shielded pair cable in accordance with
MIL-DTL-27500 or equivalent. The wire size for the
conductors in this cable shall be 22 AWG, MINIMUM. The
shield shall be connected wherever a shield pin is provided.
Shield terminations shall be made as close to the connector
Despite any copyright notice, this data and information
pin as possible. AI’s proprietary RS-485 serial data bus
disclosed herein contains confidential, proprietary designs owned
specification is available upon request.
by Audio International, Incorporated. Neither this data nor the data
5. Two (2) connectors are available on the unit. P1 provides
contained herein shall be reproduced, used, or disclosed to
SATV RS-485 communications and P2 provides CMS
anyone without the written authorization of Audio International Inc.
Audio International, Inc. • 7300 Industry Drive, North Little Rock, AR 72117 • Phone 501-955-2929 / Fax 501-955-2988 / www.audiointl.com