Set Data Transfer Mode; Rs-422A/485 - Contec Conprosys CPS-MC341-ADSC1-111 Reference Manual

CPS-MC341-ADSC1-111, CPS-MC341-ADSC2-111, CPS-MG341-ADSC1-111 Reference Manual (Hardware)

1. Set Data Transfer Mode

With the DIP switch (SW1, SW2), data transfer mode can be changed (half-duplex or full-duplex).
Set the data transfer mode in accordance with a device which you are connecting to.

1. RS-422A/485

 Half-Duplex Switch Setup
Data transfer mode
Half-duplex [Half]
Terminator setup
Set the terminators on or off in accordance with the device which you are communicating with.
The DIP switch (SW2) sets the terminator.
The terminators on the product are 100Ω resistors.
If you intend to use a terminator of other than 100Ω, set the terminator switch OFF first, and insert
an external terminator.
(A) or (D)
Use the terminator inside
SW2
ON ON
1 2 3 4 1 2 3 4 5 6
—
TX is used to transfer data; the sending and receiving modes should be
switched over using RTS.
Terminator
(Bit 1)
Device A
Set the terminator outside
SW1 SW2
ON
1 2 3 4
—
Setup
Setup method
ON
USB R S-232 C C OM B
1
Device B Device C
SW1
1 2 3 4 5 6
— 39 —
SW2 SW1
ON
2 3 4 1 2 3 4 5 6
Terminator
(Bit 1)
Device D
(B) or (C)
When using the terminator
neither inside nor outside
SW2 SW1
ON
1 2 3 4 1 2 3 4 5 6