MC231 INPUT/OUTPUT BOARD
6
www.easy-controls.com
Power Supply (J1)
The device requests a DC power supply and connects to J1
DC : 8
–
30 V Power depending on output loading.
Fuse: F1, 1A
J1
Description
1
V+
2
GND
RESET
The device reset and set default output state at power-up. The state of outputs does not change even the
system software or hardware reset (Watchdog timer
–
WDT) may occur. There is no any reset button on the
device, Watchdog timer (WDT) has been installed in the device.
Communication Interface (J2, JP2, JP3, JP4)
The device includes inbuilt isolated RS485 communication interface. The connector is J2.
The communication baud rate can be software configured.
J2
Description
1
NC
2
Transport/(TR +)
3
Transport/Receive - (TR -)
Communication Interface hardware settings
There are three jumpers used on the device for interface configuration, they are Jumpers J2, J4, J5 which are
used to insert the termination resistors which may be required for the RS485 interface, described in Table
below.
Note:
Termination resistance must be enabled across the data lines at circuit end-points.
Jumper Short/Open
Description
Short(Default)
Enable pull-on resistance
JP2
Open
Disable pull-on resistance
Short(Default)
Enable pull-down resistance
JP4
Open
Disable pull-down resistance
Short
Enable terminal resistance
JP3
Open (Default)
Disable terminal resistance
