J17 J18
3
2
1
16
14
13
16
14
13
16
14
13
J17 J18
3
2
1
J17 J18
3
2
1
16
14
13
J17 and J18 jumpers are used to select UART communication line.
UART RS232
UART RS485
UART TTL
Jumper on
position 1 – 2
Jumper on
position 2 – 3
Jumper
released
J13, J14, and J16 jumpers are used as bias-, termination, and bias +. Usually,
in one RS485 line, there's only 1 pair of bias - and bias +, while terminations
are only placed in the outermost modules.
Condition Examples
Jumper Configuration Examples
If module is at the end of line and
the network doesn't have bias +/–
If module is at the end of line and
there is bias +/- on the network
If module is not at the end of line
and the network doesn't have bias
+/-
If module is not at the end of line
and there is bias +/- on the network
J5 blue terminal is a connector for I
2
C interface, while J11 blue terminal is a
connector for DAC.
J5
Pin
Name
Function
1
GND
Ground reference
2
SDA
I
2
C-bus input/output data
3
SCL
I
2
C-bus clock input
J11
Pin
Name
Function
1
GND
Ground reference
2
DAC
Voltage output from DAC
6
