RS-232/RS-485 Module with 8 * PT100 Inputs (galvanically isolated)

RS-232/RS-485-interface

RS-232/RS-485-interface connection (galvanic isolated)

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 isolated from connected devices by using an optocoupler.

Inputs

Visual monitoring of inputs

The state of every input is directly indicated by a LED. That way, wrong wiring is easily noticeable.

• Activity LED (short blink for interface communication)
• Status LED (short blink when accessing PT100)
• Access LEDs for all PT100 inputs (short blink if PT100 sensor is connected. Permanent on when inputs are missing or a defective PT100 sensor is connected)

Detecting accurate temperature

Because of the 24 bit A/D converter, accurate measurements are possible. The PT100 modul is able to detect the change of the electrical resistance of the PT100 sensor. The resistivity is determined by an additional sensor cable and balanced, so that the use of a much longer cable is possible. Depending on the sensor the temperature rainge is from -200°C to 850°C.

Connector

Easy to maintain connector system

The plug and socket consist of a multipoint socket connector and a multipin connector with a throw-off lever. Plug-in and plug-out is easy as well as rewiring the terminal strip. The wire connection itself is realized with a screwless connector system. A tool is included with each module.

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.

RS-232 / RS-485-Interface
Power Supply	7V bis 24V DC (über zweipolige steckbare Schraubklemme)
Interface	RS-232/RS-485 (galvanic isolated using optocoupler) Connection by 9 pin. D-SUB socket One LED for each 3,3V and 5V Voltage feed Baud rate: 1,25 MBit - 300 Bit
Control-LED	RS-232/RS-485 -activity ERROR Input state change (only for digital outputs) Timeout (only for outputs) I/O Module access

PT100-Modul
Inputs	8 * PT100-Inputs, galvanic isolated 24 bit A/D converter for accurate measurements Temperature range form 200°C - 850°C
Activity-LED	Activity LED (short blink on communication on the interface) Status LED (short blink on accessing the PT100) Access LEDs for all 8 * PT100 inputs (short blink if PT100 sensor is connected. Permanent on when inputs are missing or a defective PT100 sensor is connected)
Connectors	10 pin pluggable terminal block for 8 * PT100 channels

General
Operating temperature	+10°C...+50°C
Dimensions	126 mm x 126 mm x 31 mm (LxBxH)

Functionality of the product.

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

Digital Input/Output Sample Testprogramm für Module

Digital Input/Output Sample Testprogramm für Module

Click to enlarge

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.

Overview about available DELIB-Functions

Plug connection

Screwless plug connectors

All input and output connectors have a practical, screwless terminal block. An mechanic ejection guarantees a very quick module change without any special tools. Wire connection happens with screwdriver or an included plastic pin. (s. pic.1)

Pic1:

Connection example of a RO-Module

		RO-MODULE
		Step 1: Push the plastic tool into the small notch at the side of the terminal block, to open the clamp contacts for the wire connection.
		Step 2: When you are looking into the wire hole, you can see, that the clamp contacts have been opened. The end of the wire should be bared 5-7mm. Now put it as deep as possible into the opened hole.
		Step 3: After that, pull the plastic tool out of the notch. The clamp is closed again now.
		Step 4: After correct connecting, pull out the wiring by hand isn't no more possible

Manuals

Datasheets

Driver / Programs

Downloads