W
Warning
Using these inputs can affect the accuracy of any Safety Critical closed loop control. These displays do not
have a Real Time Operating System (RTOS). Do not use these displays as the master control for any type
of safety critical control, or closed loop control system. Frequency inputs are managed by the operating
system. Accuracy can be affected by processor load. These displays should only be used for non-safety
critical related functions.
Encoder
The encoder input is only suitable for user interface functions, such as, navigating in menus and adjusting
values because there is no guarantee that all pulses are detected and the detected direction can be false.
The rate of pulses should be kept at a few tens per second to minimize the loss of detected position
changes.
The encoder function samples the A and B signals from the encoder and increments or decrements the
counter according to the phase sequence. The counter is incremented/decremented on every low to
high and high to low edge of the A signal. Some encoders with detents give a complete pulse between
detents and the counter will be incremented/decremented by two for every detent. The counter is
incremented when the A signal is the leading phase and decremented in the opposite case.
Outputs
Digital output
Only to be used for buzzer output.
USB
USB Input/Output
Description
Unit
Minimum
Maximum
Typical
Comment
2.0 full speed
Mbit/s
—
—
12
—
Vbus input voltage
V
—
—
> 4.4
—
Vbus input resistance
kΩ
—
—
70
Vbus < 5.25 V
Short circuit protection
(No damage)
V
0
36
—
—
Vbus output voltage
V
4.75
5.25
—
—
Vbus output current
A
—
—
0.5
—
Vbus short current
A
—
1.1
—
—
The DP7XX series displays all have USB ports that support memory sticks and computer connection. The
DP7XX functions as a device when connected to a computer for diagnosis purposes or software
download. The DP7XX functions as a host when a standard USB memory stick is connected so log-data
can be transferred. There is also an option for a front type-A USB connector. The front connector is USB
host, the rear connector is USB host and device. You can only use one host connection at a time (either
front or rear), but you can use front host and rear device at the same time.
Other than supporting memory sticks and computer connection, the DP7XX series display USB port does
not support any other standard computer peripherals.
Technical Information
DP7XX Series Displays
Inputs/outputs
©
Danfoss | November 2016
L1315553 | BC00000223en-US0504 | 13
