CM550-52 Series — Industrial remote terminal unit
Source revision not stated · Technical review edition · PDF
CAIMORECM550-52X
General-purpose cellular RTU
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.
- RS232
- 1 port; 110–115200 bit/s
- RS485
- 1 port
- Acquisition functions
- Analog inputs, digital inputs/outputs and pulse counting; confirm channel configuration
- Digital acquisition and control
- 8 digital inputs, 2 PWM outputs and 4 relay outputs listed; confirm signal levels and ordered hardware
Product photography. Open full image ↗
Product overview
- Analog and digital signal acquisition
- RS232 and RS485 interfaces
- Pulse counting
Technical specifications
Options vary by model, hardware revision and firmware.
Key specifications
| RS232 | 1 port; 110–115200 bit/s |
|---|---|
| RS485 | 1 port |
| Acquisition functions | Analog inputs, digital inputs/outputs and pulse counting; confirm channel configuration |
| Digital acquisition and control | 8 digital inputs, 2 PWM outputs and 4 relay outputs listed; confirm signal levels and ordered hardware |
| Cellular variants | 4G full-network and 4G Cat.1 variants listed; confirm regional module |
| Ethernet | Confirmation required — table states one port but also references LAN1–LAN4 |
| Positioning / wireless sensor modules | GPS / BeiDou and Zigbee described as options; confirm model applicability |
| Modbus / MQTT / SCADA | Confirmation required — target protocol, firmware and interoperability require technical review |
| 5G availability | Confirmation required — navigation mentions 5G; selection guide lists 4G variants |
Source model selection
CM550-52 Series — Industrial remote terminal unit · Source revision not stated · Source p. 1
| CM550-52F | Interfaces: Terminals / Ethernet; Network: Seven-mode cellular; RS232: Yes; RS485: Yes; Buffer: 256 Mbit |
|---|---|
| CM550-52T | Interfaces: Terminals / Ethernet; Network: 4G/GPRS/GSM; RS232: Yes; RS485: Yes; Buffer: 256 Mbit |
Ports and electrical limits
CM550-52 Series — Industrial remote terminal unit · Source revision not stated · Source p. 4
| RS232 | One port; source 15 kV ESD protection; 5/6/7/8 data bits; 1/1.5/2 stop bits; none/even/odd/SPACE/MARK parity; 110-115200 bit/s. |
|---|---|
| RS485 | One port with source 15 kV ESD protection. |
| Ethernet | One 10/100 Base-T port, source parenthesis Lan1-lan4; IEEE 802-3 / 802-2 notation; 1.5 kV isolation. Port-count wording Confirmation required. |
| USB | One USB interface. |
| Indicators | POWER, ACT and Online. |
| Antenna | SMA female, 50 ohm; optional 3/5/10/15 m extension cables. |
| UIM/SIM | 1.8/3/5 V push-type card interface; 15 kV ESD protection. |
| Power | Terminal input with reverse-polarity and overcurrent protection. |
| Analog input | 16-bit resolution; -10 to +10 V voltage or 0-20 mA current; source accuracy better than ±0.5%, reference basis not stated. Number of channels not specified here. |
| Digital input | 0-3.3 V low; 5-30 V high. Eight inputs in feature list, including six counting inputs at 0-1 kHz. |
| Relay dry contacts | Four relays in feature list; source drive capacity 5 A / 30 V DC or 5 A / 250 V AC. Load category/contact life not specified. |
| Optoisolated digital output | Open collector; source maxima 30 V, 40 mA and 125 mW. Channel count not specified; combined ratings require confirmation. |
| Optoisolated PWM | Two outputs in feature list; open collector; source maxima 30 V, 40 mA, 125 mW; 0-1 kHz frequency, adjustable duty cycle. Electrical/frequency conditions Confirmation required. |
Radio parameters
CM550-52 Series — Industrial remote terminal unit · Source revision not stated · Source p. 5
| Wireless module | Industrial wireless module; actual modem/configuration must be confirmed. |
|---|---|
| TDD radio group | LTE TDD 2600/2300 MHz; UMTS 2100/900 MHz; GSM 850/900/1800/1900 MHz; receive diversity UMTS 2100/900 MHz. |
| FDD radio group | LTE FDD 2600/2100/1800/DD800 MHz (source notation retained); UMTS 2100/900 MHz; receive diversity UMTS 2100/900 MHz. |
| Source encoding/mode list | LTE/UMTS/HSPA+/HSDPA/HSUPA/WCDMA/EDGE/GSM. |
| TDD-group data rates | LTE TDD DL 68 Mbit/s / UL 17 Mbit/s; DC-HSPA+ DL 42 Mbit/s (category 24); HSPA+ DL 28 Mbit/s (category 18); HSDPA DL 14.4 Mbit/s (category 8); HSUPA+ 5.76 Mbit/s (category 6; source labels DL, direction Confirmation required); WCDMA CS UL/DL 64 kbit/s; WCDMA PS UL/DL 384 kbit/s. |
| FDD-group data rates | LTE FDD DL 100 Mbit/s / UL 50 Mbit/s; DC-HSPA+ DL 42 Mbit/s (category 24); HSPA+ DL 28 Mbit/s (category 18); HSDPA DL 14.4 Mbit/s (category 8); HSUPA+ 5.76 Mbit/s (category 6; source labels DL, direction Confirmation required); WCDMA CS UL/DL 64 kbit/s; WCDMA PS UL/DL 384 kbit/s. |
| Transmit power | LTE 23 dBm; WCDMA/HSDPA 24 dBm. |
| Receive sensitivity | <-109 dBm. |
| services | Data, voice, SMS and fax; verify service support on the ordered modem and regional network. |
Hardware and power
CM550-52 Series — Industrial remote terminal unit · Source revision not stated · Source p. 6
| CPU / MMU | Industrial CPU with MMU memory management. |
|---|---|
| Flash / SDRAM | 64 Mbit / 256 Mbit. |
| Input | 7-32 V DC in power table; 6-32 V in feature section. Confirm approved input. |
| Adapter | 9 V DC / 1.5 A |
| Communication current | 0.2 A at 9 V DC |
| Registration peak | 1.0 A at 9 V DC |
| Standby | 0.15 A at 9 V DC |
Mechanical / environment
CM550-52 Series — Industrial remote terminal unit · Source revision not stated · Source p. 6
| Housing | Metal, isolated enclosure/system, lightning/EMI design; IP30 . |
|---|---|
| Body | 167 x 104 x 26 mm excluding antennas/mounting. |
| Package | 350 x 215 x 88 mm |
| Weight | 0.52 kg |
| Operating | -25 to +70 °C |
| Storage | -40 to +85 °C |
| Humidity | 95% RH, non-condensing. |
System connectivity
From field equipment to your system.
See how CM550-52X fits into your installation.
Illustrative connection architecture. External equipment and customer software are shown for context. Interfaces and options vary by configuration.
Typical applications
- Pump station telemetry
- Water metering integration
- Wastewater sensor data acquisition
- Distributed environmental monitoring
Downloads
Download PDF
Common questions
Is a 5G configuration confirmed?
Confirmation required. The official navigation mentions 4G/5G, while the reviewed selection guide lists 4G models. Request the current ordering guide.
Can it connect directly to our SCADA system?
The manufacturer describes configuration-software integration. Exact protocols, drivers, data mapping and compatibility with your SCADA system require confirmation and testing.