88
Transistor Remote I/O Terminals with Connectors
Section 4-5
Baud Rate Setting
Pins 1 and 2 are used to set the baud rate as shown in the following table.
(These pins are factory-set to OFF.)
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 won’t be
able to participate in communications. Furthermore, a node with an incor-
rect baud rate may cause communications errors between nodes with cor-
rect baud rate settings.
Setting Pins 3 and 4
The functions of pins 3 and 4 differ for inputs and outputs, as shown in the fol-
lowing diagram.
Pin 3:
Reserved (Always OFF)
Pin 4:
As follows:
Inputs:
No function (Always OFF)
Outputs:
Hold/Clear outputs for communications error
OFF (Clear):
All output data from the Master will be cleared to 0 when a
communications error occurs.
ON (Hold):
All output data from the Master will be retained when a
communications error occurs.
Pins 3 and 4 are factory-set to OFF.
4-5-2
Transistor Remote Input Terminals with 32 Points and
Connectors: DRT1-ID32ML (NPN) and DRT1-ID32ML-1 (PNP)
Input Specifications
Pin 1
Pin 2
Baud rate
OFF
OFF
125 kbps (default)
ON
OFF
250 kbps
OFF
ON
500 kbps
ON
ON
Not allowed.
4
3
ON
Input: Not used (Always OFF)
Output: Hold/Clear outputs for communications error
Reserved: Always OFF
Item
Specification
Model
DRT1-ID32ML
DRT1-ID32ML-1
Internal I/O common
NPN
PNP
Input points
32 points
ON voltage
15 V DC min. (between
each input terminal and V)
15 V DC min. (between
each input terminal and G)
OFF voltage
5 V DC max. (between
each input terminal and V)
5 V DC max. (between
each input terminal and G)
OFF current
1.0 mA max.
Input current
6.0 mA max./point at 24 V DC
3.0 mA min./point at 17 V DC
Input impedance
4.4 k
Ω
ON delay time
1.5 ms max.
OFF delay time
1.5 ms max.
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