![background image](http://html1.mh-extra.com/html/advantech/amt-70/amt-70_installation-and-operation-manual_2857565112.webp)
AMT-70/AMT-73/AMT-75 Installation and Operation
8.10
RS-485 Connector Pin-Outs
The figure below,
lists the pin-outs of the 9-pin D connector (P8 for AMT-70; J13 for AMT-73L):
Figure 53: RS-485 Connectors Pin-Outs
DB-9 Pin
Number
AMT70
AMT73L
Pin 1
Signal Ground
RS-485 TX +
Pin 2
Power Detector -
Signal Ground
Pin 3
Not Used
Signal Ground
Pin 4
RS-485 TX -
Signal Ground
Pin 5
RS-485 TX +
Signal Ground
Pin 6
Power de
RS-485 TX -
Pin 7
Not Used
Signal Ground
Pin 8
***
RS-485 RX +
RS-485 RX +
Pin 9***
RS-485 RX -
RS-485 RX -
*** For AMT70/73L Pins 8 and 9 are for 2-wire operation. Pins 4, 5, 8, and 9 are for 4-wire
operation.
8.11
EIA/TIA-449 AMT-73L Connector Pin-Outs
The figure below,
lists the pin-outs of the 37-pin D connector (labeled J8 on AMT-73L) on the rear
panel.
Figure 54: EIA/TIA-449 Connector Pin-Outs
PIN NUMBER
SIGNAL NAME
COMMENT ( Signal Direction )
4
SD A
Send Data + to DCE ( Modem )
22
Send Data - to DCE ( Modem )
SD B
6
RD A
Receive Data + from Modem
24
RD B
Receive Data - from Modem
7
RTS A
Request To Send + to Modem
25
RTS B
Request To Send - to Modem
9
CTS A
Clear To Send + from Modem
27
CTS B
Clear To Send - from Modem
11
DSR A
DSR + means ( from ) Modem is Ready
29
DSR B
DSR - means ( from ) Modem is Ready
12
DTR A
Data Term Ready + to Modem
30
DTR B
Data Term Ready - to Modem
13
Recvd Line Signal Det
From Simple Interface
31
Recvd Line Signal Det
From Simple Interface
17
TT A
Transmit from Terminal to Modem
35
TT B
Transmit Timing - from Terminal to Modem
5
ST A
Send from Modem to Terminal
23
ST B
Send Timing - from Modem to Terminal
8
112
RT A
Receive from Modem to Terminal
26
RT B
Receive Timing - from Modem to Terminal
10
LL
Local LoopBack from Terminal to Modem
1
GND ( Shield )
Shield is connect to Chassis GND
19
GND ( Shield )
Shield is connect to Chassis GND
37 SC
Send
Common
20 RC
Receive
Common
33 SQ
Signal
Quality
Summary of Contents for AMT-70
Page 34: ...AMT 70 AMT 73 AMT 75 Installation and Operation 34 This page has been left intentionally blank...
Page 35: ...AMT 70 AMT 73 AMT 75 Installation and Operation 35 This page has been left intentionally blank...
Page 36: ...AMT 70 AMT 73 AMT 75 Installation and Operation 36 This page has been left intentionally blank...