serial - Festo Didactic

3) SAFETY NOTES
The indicated maximum voltages for the power supply and for the inputs and outputs of the EasyPort must
not be exceeded. Under no circumstances should voltages in excess of 30 V be used. Electrical connections
should only be made and broken with devices switched off. The device may only be used in systems which
return automatically to a safe state when the power is switched off. The safety notes for the connected
devices must also be observed.
4) OPTICAL FIBERS
The link between the PC and EasyPort process interface is by means of an electrically isolated V.24 interface.
Expansion modules are linked via optical fiber. A white "RING OUT" port must always be connected to a
black "RING IN" port. Up to 8 EasyPort modules can be connected in this way. Please carefully insert the end
of the optical fiber all the way into the connection socket and secure the fiber by rotating the collar to the
right.
Individual optical fibers may be in the range of 0.3 to 5.0 meters. Use a sharp blade to cut the plastic optical
fibers to the desired length.
A simple tool for this purpose can be purchased from Festo:
LICHTL.SCHNEID. SOE-LKS (part number 36 479)
5) DRIVER SOFTWARE
The Windows driver software EzDDE (PN 374 212) obtainable from Festo Didactic *) and EzOPC allows you
to read signals in and out of your EasyPort simply using a Windows application. Data exchange takes place
via the DDE or OPC data interface integrated into Windows. This allows any application program provided
with such software interface (such as a STEP7 simulator, a visualization package such as InTouch, or Excel
spreadsheet) to establish contact with the EasyPort. The software of Festo Didactic is explicitly designed for
this communication e.g. FluidSIM® and Cosimir®.
The EasyPort can be addressed from your own programs (for example in C, PASCAL or BASIC) with the
commands PRINT, INPUT etc. in its CI (Command Interpreter) command language.
*) Festo Didactic GmbH & Co. KG,
PO Box 100710, D-73707 Esslingen, Germany, Phone +49 711 3467 0
6) DISPLAYS (LEDs on top of module)
SHORT
If a short-circuit is detected at one of the outputs, the red SHORT LED lights. The outputs of the EasyPort are
then switched off.
This LED also lights during power-on of the module. It is switched off again during the course of the poweron
test, before the output drivers are activated.
STATUS
The green STATUS LED has various statuses:
- Flashing 1 Hz: Power-on condition, module not yet communicating
- Pulsating: Module is addressed. The address is shown at intervals of two seconds by the
number of times the LED is switched off.
INPUTS 0 to 7
Status display of the 8 digital inputs by green LEDs.
OUTPUTS 0 to 7
Status display of the 8 digital outputs by green LEDs.
7 SEGMENT DISPLAY
Display of the input/output voltage of the analogue part in Volts
BUTTON SEL
This button selects the analogue channel displayed on the 7 segment display.
An LED line show the currently selected channel.
7) TECHNICAL DATA
EasyPort Process Interface, Basic module D8A
Operating voltage 24 V DC +/- 10%
Power consumption 3 VA
Outputs 8 digital 24V / 2 analogue 0...10V
Output load (max.) 0.3 A per digital output / 10mA per analogue output
Short-circuit protection Yes
Inputs 8 digital 24V / 4 analogue 0...10V
Operating point of the digital input 12 VDC
Hysteresis of the digital input 3 V
Filter 10 ms
Communications interface V.24, electrically isolated and fiber optic
Optical fiber length 0.3 m to 5.0 m
Protocol ASCII, 19.2 kBd
Degree of protection IP20
Immunity to interference Class 4 as per DIN/IEC 801/4
Permissible ambient temperature
operation/storage
0 to 55 °C / 0 to 70 °C
Dimensions in mm / inch (L x W x H) 162 x 148 x 36 / 7.38 x 5.83 x 1.41
Weight in kg 0.65
EasyPort D8A Data sheet as electronics, D-72663 Großbettlingen, Germany