Impulse Collection System

1. General

Leveltec Communications - VSM-2000 Pulssinkeruujärjestelmä

    The device is modular – assembled from different cards in accordance with the purpose of use. In addition to CPU, line connection, and power cards, the housing also holds two I/O cards; thus, the capacity is 18 input channels.

    Modular structure
    • expandable, max. 18 impulse inputs
    • analog input card
    • programmable, digit. input/output cards

    Multilateral traffic protocols

    Simultaneous traffic through selected telephone network and RS-connection

    • possibility of parallel use of a telephone

    Installation on metering device base

    Versatile function indication with LED-s

    • password protected, 3 levels
    • through RS-connection with the help of PC data traffic program on site, or through a reading program

    Events log
    • registration of desired events and the times of their occurrence

    Output relay
    • impulse length and direction can be selected

    Can be used as a remote control system substation

2. Construction

    2.1 Housing
      Housing material: metal. Because of its special design, the housing can easily be mounted on the M2 meter base similarly to normal meters.
    2.2 Connection
      Terminals for 1.5 mm² wire. Wire is passed to the terminals through the housing from below.
    2.3 Sealing
      The housing has two-level sealing: sealing of the housing and sealing of the switching space.

3. Power card

    Power card adjusts the supply power of the device. Supply power can be selected (different connectors for different power supply): 100 or 230 V AC, or 24 V DC.
    3.1 Indication
      Power on-LED.

4. Line connection card

    4.1 Telephone connection
      Communication is performed through line connection card to the public telephone network. The device recognises incoming calls, thus a telephone can be connected in parallel with it.
    4.2 RS-connection
      The card also has interface based on the RS232-standard wired to the instrumentm coupler for the fixed connection and 9-hubed female D-connector located in to the cover. D-connector is the so-called maintenance connection intended for reading of the device and on-site parameterisation with PC. The connection is password protected. Telephone connection and RS232 connection may be connected at the same time.
    4.3 Overvoltage protection
      The telephone connection is protected with shimmer discharge conduit and the RS-connection with PTC-resistance and varistor.
    4.4 Indication
      The card is equipped with LEDs that indicate signals per each connection.

5. Impulse card

    5.1 Inputs
      Impulse card is equipped with nine inputs, which can be parametered either as impulse or status data inputs.

    • Impulse duration 30...200 ms
    • Max impulse frequency 16 Hz
    • Impulse/data input circuit current approx. 7 mA
    • S0-impulse (DIN 43864)

    5.2 Indication
      Input status is indicated by LEDs (Input active = LED on)
    5.3 Relay output
      The card also has a relay equipped with potential free conversion keys, e.g. for repeating of alarms or synchronisation of measurement period. The relay is normally in standby mode.
    5.4 Indication
      Relay status is indicated by LEDs.

6. CPU card

      CPU card houses e.g. modem, real time clock, program, and memory. From the card it is possible to restore default parameters (= resetting e.g. in case of forgetting the password).
    6.1 Clock
      The accuracy of real-time clock is +/- 1s/day; in case of power-outage, the clock will continue to function for at least 7 days.
    6.2 Memory
      Measurement data and program parameters are stored in permanent memory. Hourly information storage capacity is at least 14 days.
    6.3 Indication
      The following functions are indicated with LEDs:
    • the program functions normally
    • some kind of failure prevents registration or data transmission (alarm)

7. Program

    Program circuit is located at the CPU card and can be replaced.
    7.1 Parameterisation
      The device can be parameterised whether through the telephone connection or the RS-connection. Access to parameterisation level is password protected. Parameterisation is performed with PC data traffic program, thus special parameterisation program is not always required.
    7.2 Impulse registers
      Each input parameterised as an impulse input has two registers: recording register and flash register.
    7.2.1 Recording register
      All impulses detected during a logging period are stored in the recording register. One of the following logging periods can be selected: 1...6, 10, 12, 15, 20, 30, 60, and 180 minutes.
    7.2.2 Flash register
      The number of impulses detected during a preset time (1...10 minutes) and the time between the first and last impulse are stored in the flash register with 10 ms accuracy.
    7.3 Status register
      Each input parameterised as a status input has its own register to which the times of all status changes are stored. Status input may detect failures, thus status changes are transferred into the events log.
    7.4 Events log
      100 last events are stored in the events log.
      The following events are stored:
    • Power outages (from…to…)
    • Status changes of inputs detecting failures
    • Failures detected by internal supervisors
    • Accessing of parameterisation level and the connection method
    • Setting of clock over the set limit
    • In case of events, the following information is stored:
    • Event number
    • Time of occurrence
    • Event code (identifying the event)
    • Additional information, e.g. by how much the clock was moved, or the status input change of which channel caused the event

7.5 Output relay

    The relay can be parameterised:
    • Impulse interval can be selected, available range 1...180 minutes
    • Impulse interval can be selected, available range 1...180 minutes

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