Knick Elektronische Messgeräte have expanded their slim Memosens transmitter series MemoRail for control cabinet installation with a Modbus interface version. The MemoRail Modbus A1405N is the first multi-parameter analyzer that provides operators with an economic, compact transmitter for full-featured integration of Memosens monitoring stations into the fieldbus standard. Up until now, operators could only choose between comprehensively equipped analyzers with a display or compact transmitters with limited functionality.
The new MemoRail Modbus modules from Knick, which feature a modular housing with a width of just 17.5 mm, not only transmit measured values and diagnostic data to the Modbus master, they also enable unrestricted access to device configuration and sensor calibration through the Modbus RTU protocol. Up to 32 transmitters can be connected to a Modbus master. For the measurement of pH/ORP, conductivity or oxygen, MemoRail Modbus can be combined with all Memosens sensors, whether pH glass, IsFET, oxygen, or conductivity (conductive and inductive). What's more, the DIN rail module is the only analyzer of its class that enables the connection of LDO sensors (luminescent dissolved oxygen) for the optical measurement of oxygen. The new devices come as single- or dual-channel versions with freely combinable parameters or sensors. Either two freely selectable Memosens sensors or a Memosens sensor and a SE 740 LDO can be connected. Additionally, the transmitters allow for the connection of the new SE 554 X/1-AMSN and SE 555 X/1-AMSN combination sensors that synchronously measure pH and ORP values. In this way, a dual-channel MemoRail model provides four readings as well as temperature.
The network address for rapid Modbus configuration is set via DIP switches on the front panel. The 24 V DC supply can be connected either via TBUS or via a cable connected to the terminals at the back. Red and green LEDs indicate the device status, communication interruptions, defective sensors or device settings unsuitable to the sensor as well as the device's maintenance requirements. Knick provides a 3-year warranty on the MemoRail Modbus transmitters.
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