SMS Monitor Alarm and Remote Controller S130L is a compact RTU that provides SMSbased monitoring, remote control, and alarm notifications over 4G networks. Designed for straightforward installation and reliable remote operation, it combines inputs, outputs, and a USB interface with an inbuilt watchdog to minimize downtime and simplify remote management. Key benefits Remote monitoring and control by SMS for sites without fixed network access. Fast response to alarms and faults through SMS alerts and remote output control. Improved uptime and reliability thanks to the inbuilt watchdog that detects and recovers software faults automatically. Simple setup and configuration using the USB interface for local access and firmware updates. Core functions and important attributes Inputs and outputs: 2 digital inputs (2DIN) for sensor or switch status monitoring, and 2 digital outputs (2DO) for remote switching of relays, pumps, valves, or alarms. Communication: Integrated 4G cellular module compatible with AT&T network for SMS transmission and remote control. Interface: USB port for configuration, logging, and firmware updates using a laptop or service tool. RTU capability: Operates as a remote terminal unit suitable for integration into monitoring and control workflows that rely on SMSbased control or telemetric reporting. Reliability: Inbuilt watchdog monitors system health and triggers automatic recovery if needed, reducing manual visits. Form factor: Compact design intended for installation inside control cabinets or equipment enclosures where space is limited. Performance and compatibility Designed for reliable, lowbandwidth SMS communications over 4G cellular networks. USB interface supports quick commissioning and local troubleshooting. Compatible with equipment that accepts simple digital inputs and outputs and with control routines that use SMS commands for remote operation. Practical applications and scenarios Remote pump station: Monitor float switch inputs and activate pump start outputs remotely by SMS when maintenance or intervention is required. Remote site security and access control: Receive SMS alerts from door or gate sensors and trigger locks or sirens using the digital outputs. Backup generator or equipment status monitoring: Track run status and fault conditions through digital inputs and remotely start or stop equipment when . Why choose S130L Purposebuilt for remote monitoring and control in locations without reliable wired networks. Minimal local configuration required thanks to USB setup and clear input/output mapping. Builtin watchdog adds resilience for unattended installations. Model reference Product model S130L, 2DIN and 2DO with USB, 4G module configured for AT&T, RTU with inbuilt watchdog. Technical note This description reflects the S130L feature set for remote SMS monitoring, alarm notification, and basic remote control via digital inputs and outputs with USB configuration. For integration details, confirm compatibility of connected sensors, actuators, and SMS command formats before deployment.