GSM Ñ-1.02, Ñ-1.02.01, Ñ-1.02.02 communicators

DESIGNATION AND AREA OF APPLICATION

Communicators are intended for interfacing mobile radio-telephone GSM-900/1800 standard network with facility local RS-485 standard network for the purpose of remote radio access arrangement for establishing remote radio access. By means of this interface, remote radio access is established from the control and data acquisition center to electric power meters, controllers and other measurement devices located at a facility and incorporated into a local network.

Communicators can be used as channel-forming device as a part of distributed automated informational and measurement electric power monitoring and accounting systems (AIMEPMAS) and as a part of automated supervisory control systems (ASCS).

Communicators are produced instead of previously manufactured communicator GSM C-1.01, support all its functions and have a number of additional capabilities.

Ñ-1.02
Independent, structurally complete device powered by AC or DC voltages in the range of 80 to 276V (from 276 to 440V for 6 hours).

Ñ-1.02.01
Single board open-frame device to be built into PSCH-4TM.05MK meter or other devices with overall dimensions of a section for installation of additional interface modules of PSCH-4TM.05MK meter powered from an external DC power source in the range of voltage from 6 to 18 V.

Ñ-1.02.02
Single board open-frame device to be built into PSCH-3TM.05M meter or other devices with overall dimensions of a section for installation of additional interface modules of PSCH-3TM.05M meter powered from an external DC power source in the range of voltage from 6 to 18 V.

TECHNICAL FEATURES

• Possibility of operation in two different GSM networks via CSD and GPRS channels with automatic network selection.
• Possibility to establish and support simultaneously of up to four outgoing and one incoming TCP/IP-communications with different remote computers via Internet using GPRS channel and mobile network operator gate.
• Availability of digital isolated remote-signaling inputs and remote control outputs with the possibility of remote control and status readouts.
• Availability of LED displaying device to display communicator current status.
• Built-in real-time clock with possibility of time synchronization according to Internet precise time servers.
• Keeping of event logs.
• Possibility of remote and local updating of software.

FUNCTIONAL CAPABILITIES

Communicators can register and operate in one of two GSM networks determined by installed into communicators personal subscriber’s identification cards (SIM-cards), and two of those can be installed.
Communicators can operate in GSM network in batch data transmission mode using GPRS technology and in channel data transmission mode using CSD technology (modem connection).

Communicators can establish and support simultaneously of up to four outgoing and one incoming TCP/IP-communications with different remote computers via Internet using GPRS channel and mobile network operator gate, in whose network a communicator is registered.
Outgoing TCP/IP-connections (the communicator is a TCP/IP client) are established with remote computers having static IP addresses, by communicator’s request in accordance with configuration communicator parameters:

• on interface request in the format of communicator protocol;
• when permitted incoming voice call is detected (with filtration option by means of a configurable list of allowed subscriber numbers);
• on configurable auto-connection timer;
• on configurable auto-connection schedule.

Incoming TCP/IP-connection (the communicator is a TCP/IP server) is served by a communicator via a configurable port at the request for connection from a remote customer. For that, a communicator shall have static IP address in Internet. Incoming TCP/IP-connections can be filtered by means of a configurable list of allowed incoming IP-addresses.

Communicators allow establishing of CSD-connections with GSM-modems of remote computers when a call in the data transmission mode is detected. And communicators in this case can be in the status of connection with remote computers via GPRS channel. Incoming CSD calls can be filtered by means of a configurable list of allowed subscriber numbers.

Communicators in the status of connection with remote computers (any GPRS-TCP/IP or CSD) perform data forwarding received from a remote computer via GSM network into RS-485 networks and vice versa. And depending on configuration parameters, communicators can provide transparent (with no change) data bridging from a network into a network or translation bridging.

Communicators under all bridging modes support packet exchange protocol with remote computers allowing significant (up to 10 time) increase of data ecxchange rate between remote computers and devices connected to communicator RS-485 interfaces.

Communicators have a number of user configurable parameters that can determine their properties and behaviour in a system and can be modified remotely from remote computers via GSM network (remote configuration) or via facility’s RS-485 network (local configuration).

Communicators perform rate conversion function and allow exchanging with devices connected to RS-485 interface at exchange rates within the range of 300 to 115200 bit/sec.

Ñ-1.02 and Ñ-1.02.01 communicators have two digital isolated remote signalling inputs and two digital isolated remote control outputs with the option of their remote reading and controlling of outputs. Depending on configuration, communicators, on changed statuses of remote signaling inputs, can generate and transmit SMS-message to a subscriber, which number is given in configuration parameters.

Communicators have built-in real-time clock and allow setting of time remotely and locally, time correction and synchronization by Internet precise time servers.

Communicators keep event logs with the possibility of their further viewing:

• ON/OFF time log;
• time correction log;
• log for registration in a network of a mobile communication operator;
• GPRS connection log;
• GPRS traffic log;
• CSD connection log;
• log for status changing of the remote signaling inputs;
• log for unauthorized access to parameters and data;
• parameter reprogramming log;
• status log;
• log for GPRS sessions with main control room server;
• log for GPRS sessions with auxiliary control room server;
• log for GPRS sessions with technical support server;
• log for GPRS sessions with precise time server;
• log for GPRS sessions with a remote customer.

ELECTRIC POWER METER TECHNICAL CHARACTERISTICS

*   When providing power supply to Ñ-1.02.01, Ñ-1.02.02 communicators, an external DC power supply source shall provide for maximum pulse currrent of minimum 700 mA during 0.5 msec.
**  There are no remote signalling inputs and remote control outputs in Ñ-1.02.02 communicator.
*** Mean lifetime of built-in clock back-up power supply battery is minimum 10 years.