AMG AMG4784E Скачать руководство пользователя страница 5

AMG Systems Ltd. reserves the right to make changes to this 
document without notice. The information herein is believed to 
be accurate. No responsibility is assumed by AMG for its use.  

Page 5 of 8 

AMG4784E Instruction Sheet D32046-
00 
 

 

 

Data and Audio Channel Configuration 

Data and Audio Channel Configuration 

The 

AMG4784E 

and rackmount equivalent 

AMG4784ER 

sends and receives data to/from Channel A. 

Channel B is not available. Channel A is a single data interface selectable by the user with the slide 
switch on the rear panel.  
 

 

Data Interface Connections Channel A 

 

 

RJ45 Pin 

No.

 

Channel A

 

Cat 5/6 Cable

 

 Colour Code T568B

 

RS485         

[switch low]

 

RS422          [switch 

mid]

 

RS232            

[switch high]

 

1

 

 

IN + (A) 

GND 

White/orange

 

2

 

 

IN - (B) 

IN 

Orange

 

3

 

 

 

 

White/green

 

4

 

 

 

 

Blue

 

5

 

 

 

 

White/blue

 

6

 

 

 

 

Green

 

7

 

IN/OUT + (A) 

OUT + (A) 

N/A 

White/brown

 

8

 

IN/OUT - (B) 

OUT - (B) 

OUT 

Brown

 

 
Note: (A) or (B) in brackets in above table refers to RS485 / RS422 data specification, not Channel A, 
Channel B. 
 

 

Data Channel A Configuration 

Channel A is always present and allows for a RS232, RS422 (full duplex, four wire) or RS485 (half 
duplex, two wire) interface depending on the position of the switch located above the RJ45 connector. 
The switch signifies the presence of the X16004 Low Speed Data/Audio Interface Board. If there are 
LED's present on the RJ45 connector then an X16003 Ethernet Interface Board is fitted. 
 
The data input for both the RS485 and the RS422 modes detects a tri-state input condition by 
monitoring the differential voltage level across the input. A differential level below 600mV positive or 
negative will be detected as a tri-state condition. A level above 600mV positive or negative will be 
detected as a logic 1 or logic zero respectively. It is important therefore to terminate the RS485 bus or 
the RS422 input bus using 120Ω if a pre-bias is present on the RS485 or RS422 bus.  
 
A large number of third party equipment manufacturers apply a pre-bias on their RS485 bus. This pre-
bias is applied by pulling one arm of the RS485 bus high (+5 volts) and the other arm low (0 volts) 
using high value resistors within the third party equipment. In order to ensure that the AMG equipment 
detects a tri-state condition, then these resistors should have 

a value above 5kΩ.  If the third party 

bias resistors are less the 750Ω the bus can be double or triple terminated as required to ensure that a 
tri-state level is detected. 
 
Note: The Data Channel A is shipped from the factory set up for RS485 operation unless otherwise 
requested. 
 

 

Содержание AMG4784E

Страница 1: ...th Bi directional Data Channel plus Ethernet The AMG4784E is a standalone four channel video receive unit designed to receive 4 video signals and transmit and receive 1 data signal plus full duplex 10...

Страница 2: ...eo Output Connections 4 Optical Connections 4 Power Connection 4 Ethernet Connection 4 Data and Audio Channel Connections 4 Data and Audio Channel Configuration 5 Data and Audio Channel Configuration...

Страница 3: ...struction Sheet D32046 00 Introduction Unit Functional Schematic The AMG4784E receives up to 4 video and 1 data signals from the AMG4783E It also transmits 1 data signal to the AMG4783E Ethernet conne...

Страница 4: ...22dBm Wavelength 1310nm Optical Fibre Singlemode Power Connection Connector Type 2 1mm screw lock long power jack centre positive Connector Partno Switchcraft S761K AMG G16125 00 Supply Voltage 13 5 t...

Страница 5: ...RJ45 connector The switch signifies the presence of the X16004 Low Speed Data Audio Interface Board If there are LED s present on the RJ45 connector then an X16003 Ethernet Interface Board is fitted...

Страница 6: ...eceiving Org optical channel receiving but not sync Off optical channel not transmitting Low Speed Data LEDs Channel A Data Present TX RS485 or RS422 Green logic zero V V present on IN IN Red logic on...

Страница 7: ...e adaptor should be fitted to both the Transmit unit and the Receive unit The Ethernet interface can operate at either 10Mbits s half duplex or 100Mbit s full duplex and data is transmitted from one p...

Страница 8: ...s out of the case Ensure that the fibres do not snag or get trapped To replace the PCB s into the case slide the PCB s gently into the case aligning the boards with the appropriate slots Ensure that...

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