The M4i-RTU provides for the input of up to eight (8) Memosens pH, ORP, conductivity, and oxygen sensors. The device has up to four (4) separate displays on the front panel. Each display is capable of scanning up to sixteen (16) variables generated by MemoRail Modbus transmitters inside the NEMA 4X cabinet. When using the four (4) display option, you are able to monitor up to sixty-four (64) process variables and diagnostics. Also, the superluminous displays are easily readable in smoke, dust, fog, and direct sunlight. As a master, the M4i-RTU reads up to 16 slave devices, scales the data from each, displays the result, and operates the internal relays and 4…20mA output. In addition, it displays all enabled variables in sequence, at a user-programmable scan rate. As a snooper, the M4i-RTU listens to the Modbus traffic and displays the specific registers being polled by a master device such as a PLC.  

Easy to Use: Bright display with simple configuration

• A programmable register sequencing and scan rate allow the user to customize the display to their preferences
• Configured using integrated function keys or with a PC based software

Flexible: Modular design with a variety of input & output combinations

• The M4i-RTU is scalable to fit any pH/ORP, conductivity, or oxygen application(s)
• Expandable with additional MemoRail Modbus transmitters, displays, or output modules with up to 64 sensors

Informative: All sensor information at a glance

• Both the primary variable and temperature can be displayed for each sensor
• Sensor diagnostics like sensor wear and operation time are also available