New modules for distributed integration of intrinsically safe signals

Using EPX modules with IP67-rated housing units offers numerous advantages for applications with explosion protection requirements, both in processing plants and in traditional mechanical engineering. The fully encapsulated modules in an industrial housing unit can be installed directly and individually in machines and systems, even in wet, dirty, or dusty conditions, and enable connection of up to eight field devices. This facilitates reliable data acquisition in hazardous areas where control cabinets and terminal boxes cannot – and should not – be installed. Furthermore, safety barriers are no longer required, which not only saves on space but also reduces costs. Pre-assembled cables are connected to the EtherCAT Box module, thus cutting down on installation and commissioning time and preventing wiring errors caused by incorrect contact assignments. What’s more, the distributed signal acquisition concept also simplifies the modularity of plants. The new additions to the portfolio are:

• The EPX2004-0022 EtherCAT Box module, which provides an output voltage of 24 V DC and a maximum output current of 50 mA per channel as a 4-channel digital output. The total current is 200 mA. The signal state of each individual channel is indicated by an LED.
• The EPX3204-0022 EtherCAT Box module, which can operate temperature sensors (Pt100) in 2-, 3- and 4-wire technology as a 4-channel analog input. Linearization is performed across the entire, freely selectable temperature range. The terminal is set by default for Pt100 sensors in 4-wire technology. The EPX3204-0022 uses LEDs to indicate signal status and sensor faults (e.g. wire break).
• the EPX3314-0022 EtherCAT Box module, which can operate thermocouples in 2-wire technology as a 4-channel analog input. Linearization is performed across the entire, freely selectable temperature range. Wire break is indicated by error LEDs. Cold junction compensation is performed by internal temperature measurement. Voltage measurement in the mV range is also possible.