The CS-MIM is a intelligent modem providing wireless connectivity over public GPRS/3G network to energy meters used in power distribution or transmission. The CS-MIMmodem is capable of communicating with meters over RS232/RS485 serial port. The device is typically used for remote meter data acquisition of Distribution Transformer / HT consumer meters. The CS-MIM modem currently supports DLMS/COSEM protocol. A companion MDAS application retrieves data form these modems and stores it in a database. All data elements like Instantaneous data, Load Survey Data, Billing data, Tamper and other event data are retrieved and stored in the database at periodic preconfigured intervals.
The modem can be used in both ‘push’ and ‘pull mode’ of operation. Apart from scheduled data transfer, ‘Ondemand’ data transfer can be initiated for Load Survey, Billing, Tamper and Instantaneous data.
The device has an in-built wireless network (GPRS/3G) connectivity monitoring capability to ensure that any loss in the wireless network connectivity is detected and remedial measures initiated to re-establish connectivity. The CS-MIM also detects power outage and sends SMS notification to pre-configured numbers. The modem operates from 90V to 440V in ‘Single Phase-to-Neutral’ or ‘Phase-to-Phase’ mode. The enclosure is designed for IP55 compliance and it has sealing provision for the entire enclosure. The modem is tested and in operation with the following makes of energy meter Secure, L& G and Genus. The modem complies with R-APDRP specification.

  • Supports 2G/3G
  • RS232 Port with +5V supply for meter communication interface
  • Supports DLMS/COSEM Protocol
  • Detection of loss in wireless network connectivity and automatic reconnection
  • Power outage notification through SMS
  • Scheduled & on-demand data retrieval
  • Distribution Transformer & HT Consumer monitoring
  • Status and data transfer LEDs provided
  • Power supply: 90 to 440V AC Single phase or Three phase
  • Sealing provision for enclosure
  • Power supply options: 20 to 60V DC, 90 to 440V AC
  • APDRP Compliant

Wireless Interface


Band: 900 / 1800 MhzBand: 900 / 2100 Mhz
Output Power: Class 4 [2W] @ 900 MHz Class 1 [1W] @ 1800 MHz


Output Power: Class 4 [2W] @ GPRS/EDGE 900 MHz Class 1 [1W] @ GPRS/EDGE 1800 MHz Class 3 [0.25W]@UMTS 900/2100MHz Class E2(0.5W) @ EDGE 900 MHz Class E2(0.25W) @ EDGE 1800 MHz
Sensitivity: – 108 dBm [typ] @ 900 MHz – 107 dBm [typ] @ 1800MHzSensitivity: – 108 dBm [typ] @ 900 MHz – 107 dBm [typ] @ 1800MHz
GPRS Data: GPRS Class 10 Coding Scheme 1 to 4 Mobile station class BGPRS Data: GPRS Class 10 Coding Scheme 1 to 4 Mobile station class B
3G Data: HSUPA 5.76 Mbps (cat 6) HSDPA 21 Mbps (Cat 14)
SIM InterfaceNormal SIM Card with 3V /1.8V
AntennaSMA Type Antenna


Data Interface


Serial InterfaceRS232 with DB9 Connector with _5V supply for the Meter




AC ModelIP55 Enclosure – 185mm (W) x 165mm (H) x 58mm (D) Panel mounting with sealing provision for enclosure




Operating Temperatre-10ºC to 60ºC
Storage Temperature-20ºC to +70ºC
Humidity5% to 95% Non-Condensing
Type Test ComplianceCISPR22:2004 class A: Conducted disturbance

IEC 61000-4-2:2008: Electro-static discharge immunity

IEC 61000-4-4:2004: Electrical fast transient – burst immunity

IEC 61000-4-5:2005: Surge Immunity




AC Model90V AC to 440V AC Single phase or three phase




CS-MIM–GPRS-AC390V AC to 440V AC Single phase or three phase Meter Interface Modem – GPRS – 90 to 440 V AC Power supply with IP55 Enclosure
CS-MIM–3G-AC3Meter Interface Modem – GPRS – 90 to 440 V AC Power supply with IP55 Enclosure