Siemens CMR2020 LOGO! 8 Communication Modules
Manufacturer: Siemens
-
Part Number: CMR2020
Condition：New with Original Package
Product Type: PLC Communication Modules
-
Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Siemens LOGO! CMR2020 Communication Module
The Siemens LOGO! CMR2020, also cataloged as the LOGO! CMR2020 PLC Communication Module, operates as a dedicated hardware component for mobile network communication and remote monitoring within LOGO! 8 Automation Systems. This compact DIN-rail component integrates directly with logic modules via Industrial Ethernet to process mobile cellular telemetry, execute local I/O switching, and synchronize system clocks without interrupting main program logic execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | LOGO! CMR2020 |
| Brand | Siemens |
| Origin | Germany |
| Order Number | 6GK7142-7BX00-0AX0 |
| Weight | 0.25 kg |
| Dimensions | 90 x 72 x 55 mm |
| Operating Temp | -20 to +55 deg C |
| Power Consumption | 12/24 VDC supply range |
| Network Connectivity | GSM/GPRS mobile networks, 1 x RJ45 Industrial Ethernet |
| Digital Inputs | 2 DI |
| Digital Outputs | 2 DO |
| Time Synchronization | GPS / NTP protocol support |
| Protection Class | IP20 |
| Mounting Type | 35 mm DIN-rail |
Deterministic Network Execution & Ethernet Interfacing
The module processes cyclic data transfers over Profinet / EtherNet/IP deterministic networks and backplane Ethernet links to extend local control loops across wide-area infrastructure. Internal firmware flash compatibility guarantees deterministic handling of event-triggered SMS alerts, email transmissions, and IoT communication protocols (JSON and OPC UA) without degrading I/O processing cycles on the attached LOGO! 8 base unit.
Frequently Asked Questions
Q: What power wiring specifications apply when hot-swapping or servicing the LOGO! CMR2020 supply connections?
A: The unit operates from a nominal 12/24 VDC power source. Service technicians must isolate power before removing the terminal connectors or swapping the SIM card to protect internal GSM/GPRS modem electronics from transient voltage spikes.
Q: How are field signal lines attached to the 2 DI and 2 DO channels?
A: Digital inputs and relay outputs utilize screw-type terminal blocks. All field control wiring must follow standard industrial separation guidelines, keeping low-voltage DC signals away from high-voltage AC power lines to maintain noise immunity.
Field Installation Guidelines
Mount the LOGO! CMR2020 directly onto a standard 35 mm DIN-rail inside an IP20 or higher-rated control enclosure. Ensure a minimum clearance of 25 mm above and below the housing to permit passive thermal dissipation. Connect the 12/24 VDC power leads using shielded two-core cable and verify correct polarity prior to energizing. Secure the cellular antenna cable to the external SMA connector, torqueing hand-tight to avoid damaging internal RF traces. Land field signal wires onto the 2 DI / 2 DO terminal strip, verifying that cable shields are grounded at a single cabinet entry point to suppress electromagnetic interference. Insert a active GSM SIM card into the spring-loaded slot before applying power.