RS-232/RS-485-interface

RS-232/RS-485-interface connection (galvanic isolatedDue the galvanic isolation, noise or voltage spikes from the module are prevented to be transferred to other devices
)

By using a 9 pin D-SUB connector the module will be connected to the PC or any other device using a serial interface.The module interface is galvanic isolatedDue the galvanic isolation, noise or voltage spikes from the module are prevented to be transferred to other devices
from connected devices by using an optocoupler.

D/A outputs

D/A outputs, converting a digital value to a voltage

A unipolar range between 0V..5V or 0V..10V or as alternative, a bipolar range between -5V..+5V or -10V..+10V is selectable.

Timeout-protection

If required, a timeout-protection may be enabled, switching automatically the outputs to a predefined voltage value or to disable mode. This prevents damage of the connected device and takes place, when e.g. the communication gets lost. The switching protection is indicated by a LED.

Configuration of the RS-232/RS-485 Module

A brand new serial module is delivered in RS-232 mode. To change this mode to RS-485, you just have to open the case and place some jumper. Detailed information can be found in the manual RO-Serie

RS-232/RS-485 parameter configuration

All serial parameter can be configured by a few DIP switches. Such as baudrate, module address, special-mode and other interface specifications. The special-mode allows you to set the module on constant values. This may be useful for a quick start-up and defect analysis.

Controlling of our RS-232/RS-485 modules

Our RS-232/RS-485 modules can be controlled by two different ways.

1. The Windows driver library DELIB

The DELIB driver library allows a direct communication of our modules. You don't have to worry about the Handshake and the serial protocoll. The DELIB DLL assumes it for you!

2. You may program the controlling software by yourself

In our download area you can find a conform protocol. So our serial modules can be connected to small Linux computers or workstations for engineering, with RS-232/RS485 Interface.

Controlling by the DELIB driver library under Windows

The extensive but easy handling library is written for computer language, which responds to DLL's. Programming examples in source code for C, Delphi or Visual Basic can be found in our download area.

Examples for responsing our products with "C"

In the following example we show you in "C", how to access to our input modules in short time.

1. Step: Open the module

handle = DapiOpenModule(RO-SER,0); // Open serial module

2. Step: Reading of 16 digital inputs

data = DapiDIGet16(handle, 0); // Read the first 16 digital inputs

3. Step: Close the module

DapiCloseModule(handle); // Close the module

The function "DapiOpenModule" is used to open a special kind of module. Which module should be openend, is defined by the two parameters. The first parameter is for the "module ID". By the integrated "DELIB.H", you can also set this parameter to "RO-SER". So the driver library recognize, that a serial interface will be driven.

The second parameter assigns the module number. If only one module is connected to the pc, the module number is "0". Are there more than one module in the network, you have to set the correct number. The link to the according IP-address of the module can be configured by the "DELIB-Configuration Utility".

Testprogram with examples for digital inputs

With this program you can test our modules very easily. The digital input/output sample testprogram is easy to use and supports all of our measurement modules. The example above shows the test of a RO-USB-O32 input module.

Controlling by the open source ethernet protocol

If required, you can program your own controlling software. The according communication protocol is disclosed. The modules will be controlled by register. Therefore we designed an open source communication protocol, which allows to respond to the modules and excecute read/write commands. The manual "Serial Protocol" describes transmission and receiving frames, to communicate with our serial modules.