5. USER INTERFACES
Selecting the Binary Input Current
The input threshold for detecting a logic 1 can be set at either 8
µ
A or 20 mA using a
jumper on the module board. When jumper J4 is shorted, the threshold current level is 20 mA.
When jumper J4 is not shorted, the threshold current level is 8
µ
A. A threshold current value
of 20mA has a higher resistance to noise on the input but also dissipates more power.
Figure 31: Threshold select using jumper on the board
Input/Output Connector
Figure 32: 12-bit I/O (CNT) connector
Panel socket RJ45 (12-bit I/O)
Pin
Signal mark
Description
Data flow direction
1
BIN1/CNT1
Binary input/counter input
Input
2
BIN2/CNT2
Binary input/counter input
Input
3
BIN3
Binary input
Input
4
BIN4
Binary input
Input
5
GND
Signal ground
6
OUT1
Binary output (open collector)
Output
7
AN1
Analog current input
Input
8
AN2
Analog current input
Input
Table 21: 12-bit Input/Output connector pinout
28
