Connect external sensors
CM550-21F lists eight analog inputs, SDI-12 and a rain-gauge interface. Select compatible level, liquid-level or environmental sensors and validate signal ranges.
CM550-21F →Water & environmental monitoring
Build a monitoring architecture around field sensors, telemetry hardware and your data platform.
CM550-21F lists eight analog inputs, SDI-12 and a rain-gauge interface. Select compatible level, liquid-level or environmental sensors and validate signal ranges.
CM550-21F →CM550-52 lists eight digital inputs, two PWM outputs and four relay outputs. Verify output ratings, interlocks and control logic with the ordered revision.
CM550-52X →CM550-21F lists remote parameter configuration, upgrade and restart. Confirm Modbus role, firmware and SCADA integration; sensors and dashboards are separate system elements.
CM550-21F technical specifications →Local branch: an RTU control output connects through a correctly rated interface to field equipment. PWM and relay outputs are model-specific; field safety and actuator engineering remain project responsibilities.
Photos show equipment categories, not a delivered installation. Camera: Geezertd, public domain. Servers: Abigor, CC BY-SA 3.0, unmodified.
Integration architecture
Illustrative integration architecture. Sensors, application software and engineering services are separate from the listed hardware unless explicitly agreed.
Select and calibrate external level, rainfall, flow or environmental sensors. Confirm signal ranges, power and field protection.
Evaluate CM550-21F or CM550-52X for signal acquisition, local functions and cellular communications. Match the I/O and protocol configuration to the instruments.
Integrate readings into your SCADA or monitoring software. Alarm thresholds, dashboards and early warning require platform engineering and operational procedures.
Technical evaluation
Confirm model-specific capabilities and installation requirements with our technical team.
Hardware to evaluate
CM550-21F
A remote terminal unit combining sensor acquisition, local data storage, remote control and communications for water and environmental monitoring projects.
CM550-52X
Integrated analog and digital acquisition, remote control and cellular communications for distributed monitoring installations. Interface and radio configuration must be matched to the selected variant.
Start with your application
Tell us your application, required interfaces, connectivity specifications and estimated project volume.