Serial Connector Rs485; Rs485 Control Jumpers - Connect Tech COM Express 2 User Manual

Serial Connector RS485

Function RS485 Serial
P25
Location
2x10 2mm Header
Type
Pinout
Header
Pin
1
3
5
7
9
11
13
15
17
19

RS485 Control Jumpers

The RS485 Control Jumpers are used for implementing the following RS485 modes of operations:

½ Duplex Multidrop

Full Duplex Multidrop
The UART RTS signal is used along with the J11 jumpers to facilitate these modes.
Function RS485 ½ Duplex and Multi-drop controls
Location J11
Type 2x4 2mm Header
Pinout
Header
Pins
1-2
3-4
5-6
7-8
Revision 0.03
Signal DB9 Pin
RXD+ 1
TXD+ 2
TXD- 3
RXD- 4
GND 5
RXD+ 1
TXD+ 2
TXD- 3
RXD- 4
GND 5
Signal
Port 1 Driver
Multidrop Enable
Port 1 Receiver ½
Duplex Enable
Port 2 Driver
Multidrop Enable
Port 2 Receiver ½
Duplex Enable
Connect Tech COM Express Type 2 Carrier Board - User Manual
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