Description
Features
- Works off cellular towers
- Affordable at a low cost
- Monitoring multiple assets and sensors with a single CMU
- Two-Way communication to and from the asset in near real-time
- Communication with intelligent devices that use Modbus RTU protocol
- Four native discrete I/O: 3 digital input/output, 1 analog input
- Flexible power options-external DC or integrated solar
- Scheduled, event-based, and on-demand data reporting
- Remotely change independent alarm thresholds anytime/anywhere
- Access to the easy to use and password protected SatAlarm website
- Standard CMU Features
- Utilize the CTM Cellular Terminal Module
- 3 General purpose digital inputs/outputs with relay option
- 1 analog input (can be DI), with 4 alarm thresholds
- 12-32 VDC power input or self-contained 12V or 24V solar
- Internal Cell/GPS antenna with external antenna option
- Internally configurable Modbus-RTU Master
- Over the air configurable, up to 32 Modbus commands
- Registers read locally and tested for alarm conditions
- Up to 2 independent alarm thresholds per test register
- On-demand polling
- Extended temperature range battery
- Fiberglass NEMA-4X enclosure, lockable
- Cord grips and mounting hardware included
- Power Supply Options:
- Site-powered with optional battery backup
- Solar-charged internal lead-acid battery, 12 or 24V
- Built-in GPS receiver and antenna
- Supports Modbus first-fault applications
Power
- External Power – 12-32VDC
- Power Budget – Avg. 30mA @ 12 VDC (excluding sensor load, if any)
GPS
- Acquisition – Cold: <40seconds, Warm: <16 seconds
- Accuracy – 11 meters RMS
- Configurability – Schedule-driven reporting
Certifications/Compliance
- Cellular – PTCRB and AT&T approved, Quad Band GSM/GPRS
External Interfaces
- Serial – 1 RS-232 / RS85, Modbus-RTU
- Analog Inputs – 1, 11 bits (0-3VDC, 0-5VDC, 4-20mA), Loop power switchable, separate DC input
- Digital I/O – 3 (selectable as input or output)
- Optional relay output
- Modbus-RTU Serial Port
- Baud Rate Selectable   2400-115.2k
Programming Capabilities
- Applications – First fault, I/O, custom Modbus
- Alarming – Report by exception for I/O and Modbus
- Diagnostics
- Programming and Diagnostics serial port with continuous status output
