Advantech RS-485 user manual Features -- Frequency Mode, Wiring for Bi-direction Counting

Chapter 4

Up Counting : when the input signal is within logic level "1", the counter value increases.

Down Counting : when the input signal is within logic level "0", the counter value decreases.

C0A+

C0A-

C0B+/D+

C0B-/D-

Figure 4-45: Wiring for Bi-direction Counting

Note: If users select TTL mode and don't connect C0B+ C0B-, the counter value will increase. If users select Isolated mode and don't connect C0B+ C0B-, the counter value will decrease.

Features -- Frequency Mode

If users want to select frequency mode, they can only utilize Up Counting type, and can only connect to C0A+ and C0A-.

C0A+

C0A-

C0B+/D+

C0B-/D-

Figure 4-46: Wiring for Frequency Mode

ADAM-5000 4-45