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C200H I/O Link Units Section 6-1
6-1-3 Baud Rate and Hold/Clear Write Area Settings (Front DIP Switch)
The DIP switch on the front panel of the Unit is used to set the baud rate and
Hold/Clear Write Area data for communications error. The functions and set-
ting for the front panel DIP switch are as shown in the following diagram.
Baud Rate Pins 1 and 2 are used to set the baud rate as shown in the following table.
Note 1. Always turn OFF the Slave’s power supply (including the communications
power supply) before changing the baud rate setting.
2. Set the same baud rate on all of the nodes (Master and Slaves) in the Net-
work. Any Slaves with baud rates different from the Master’s rate will not
be able to participate in communications, and may cause communications
errors to occur between nodes with correct baud rate settings.
6-1-4 Specifications
General Specifications
Note All other specifications except those listed correspond to those of the
C200HX/HG/HE PLCs.
Pin Function Setting
1 Baud rate See the next table.
2
3 Hold/Clear Write Area data for com-
munications error
OFF: Clear (default)
ON: Hold
4 Reserved Leave this pin set to OFF.
Reserved (Always OFF.)
Hold/Clear Write Area data for communications error
Baud rate
Pin 1 Pin 2 Baud rate
OFF OFF 125 kbps (default)
ON OFF 250 kbps
OFF ON 500 kbps
ON ON Not allowed.
Item Specification
Model C200HW-DRT21
Connectable PLCs CS1H/G, C200HX/HG/HE(-Z)
Communications power
supply voltage
11 to 25 V DC
(Supplied from the communications connector.)
Internal current con-
sumption
Communications: 45 mA max.
Internal circuits: 250 mA max. (5 V DC supplied via PLC’s
Backplane.)
Mounting Mounted on a CS1H/G or C200HX/HG/HE Backplane.
Weight 250 g max.
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