CoolEx is a MODBUS I/O extender with analog, digital and PWM inputs and outputs. CoolEx can be used in conjunction with Programmable Logic Controller (PLC) or any other MODBUS master that requires some extra I/O or special I/O functionality. CoolEx is controlled by master by means of standard MODBUS requests and provides following features:
| • | Analog outputs 0V..10V |
| • | PWM outputs with configurable frequency and duty cycle. |
| • | Digital outputs with 5V or 12V logic one level |
| • | Digital inputs |
CoolEx is fully compliant with following MODBUS specifications:
CoolEx physical connection to MODBUS is Two-Wire EIA/TIA-485 standard interface recommended by MODBUS specification. On such 2W-bus, at any time only one driver has the right for transmitting thus a MODBUS communication is always initiated by the master. CoolEx will never transmit without receiving a request from master. A number of CoolEx devices can be connected to single 2W-bus. Each CoolEx in this case must have unique MODBUS slave address (see Modbus Address Switch for details).
Data Link Layer supported by CoolEx is MODBUS RTU Mode. The default byte format is
Start Bits |
1 |
Data Bits |
8 |
Parity |
None |
Stop Bits |
1 |
To utilize CoolEx with TCP/IP MODBUS master over Ethernet network MODBUS 485RTU/TCP Gateway can be used.
