Knick Elektronische Messgeräte has expanded its slender Memosens transmitter series, MemoRail, for control cabinet installation with a Modbus interface version. The MemoRail Modbus A1405N is a multi-parameter analysis device that provides process technology operators with an economic, compact transmitter for full integration of Memosens monitoring stations into the fieldbus standard. Up until now, only comprehensively equipped analysis devices with a display, or compact solutions with limited functionality, were available on the market for this purpose.
The new MemoRail Modbus modules from Knick, which feature a modular housing with a width of just 17,5 mm, transmit all sensor data and readings to the Modbus master using the Modbus RTU data format. Unlike conventional compact solutions, they also enable unrestricted access to device configuration and sensor calibration via Modbus; up to 32 transmitters can be connected to a Modbus master. For the measurement of pH/redox, conductivity or oxygen, MemoRail Modbus can be combined with all Memosens and digital sensors whether pH glass, IsFET, oxygen, or conductivity (conductive and inductive). What is more, the DIN rail module enables the connection of LDO sensors (luminescent dissolved oxygen) for the optical measurement of oxygen. The new devices are available in one and two-channel versions with freely combinable parameters or sensors. Either two freely selectable Memosens sensors or one 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 determine pH and redox value respectively. In this way, a two-channel MemoRail model provides four readings as well as temperature.
The network address for rapid Modbus configuration is set via DIP switch on the front panel. The 24 VDC 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.
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