Modular device for DIN-EN 60715 TH35 rail mounting. 2 modules = 36mm wide, 58mm deep.

The energy meter transmitter module FSS12 evaluates the signals from the energy meter

S0 interface and transmits wireless telegrams containing consumption and meter reading

to the Eltako wireless network for evaluation on a PC using the Visualisation and Control

Software FVS-Home and FVS-Energy. On three-phase energy meters, the data sent includes

normal rate (HT) or off-peak (NT) energy tariff data, provided the E1/E2 terminals on the

three-phase energy meter are connected to E1/E2 on the FSS12.

FVS-Energy and FVS-Home support up to 100 transmitter modules and FVS-Professional up to

250 transmitter modules.

The 12V DC supply voltage of the complete RS485 bus is mainly powered at 6W, 12W or

24W by a switch mode power supply unit SNT12-12V DC that is only 1 or 2 pitch units wide.

If the relay of the FSS12 is switched on, a power of 0.6 watts is required.

The setting and display screen is subdivided into 3 fields:

Field 1:

The normal display is the unit of the meter reading currently displayed in Field 3.

This alternates every 4 seconds with either kilowatt hours kWh (KWH in display) or

megawatt hours MWh (MWH in display). The display in Field 1 is supplemented by a

+ sign after the reading to indicate that the off-peak tariff rate is applied to E1/E2.

Field 2:

Instantaneous values of energy consumption (active power) in watt (W) or kilowatt (kW).

The left-pointing arrow in Field 1 indicates an automatic switchover from 0 to 99W to 0.1 to 65kW.

Field 3:

The meter reading is the normal display. Every 4 seconds the display alternates between

3 whole numbers and 1 decimal point (from 0.1 to 999.9kWh) and 1 or max. 3 whole

numbers (from 0 to 999MWh).

Press the left button MODE

to access setting mode. Press the right button SET to browse

through the setting options, enter or edit settings as required and finally confirm by pressing MODE.

1. HT flashes to indicate

normal rate meter reading. Confirm by pressing MODE again and MWH flashes. SET changes the meter

reading from 0 to 999 in Field 3. Press SET briefly to increment by 1; hold down to increment rapidly. Release and press again

to change direction. Confirm by pressing MODE even if nothing was entered.

2. KWH flashes and SET changes the meter reading from 0.1 to 999.9 in Field 3, as before with MWH. Also confirm the correct

entry by pressing MODE.

3. NT flashes and the

off-peak meter reading may be displayed as described under HT above.

4. S0 flashes and

the number of S0 pulses per kWh on the meter is entered in Field 3. This is specified on the meter sticker.

0010, 0100, 0800, 1000 or 2000 can be set by pressing SET. Press MODE to confirm your entry.

5. LRN flashes and after confirming by pressing MODE, a

wireless teach-in telegram is transmitted by pressing SET. If a smart

metering display is already installed, it is used to teach-in the transmitter ID, provided the receiver was set to LRN shortly

before. To transmit further wireless teach-in telegrams, confirm the flashing LRN again by pressing MODE and transmit by

pressing SET.

6. PSW flashes and after confirming by pressing MODE, press SET to set the

power threshold from 0 to 60kW for the load shedding

relay NO contact and a corresponding wireless telegram. The left pointing arrow in Field 1 indicates kW. Confirm by pressing MODE.

In the setting 0.0, the relay contact closes after switching over from normal rate HT to off-peak NT. At the same time, a wireless

telegram EIN (ON) is transmitted. When the device is switched over from NT to HT, AUS (OFF) is transmitted and the relay contact

opens. With any other value from 1 to 60, the load shedding relay switches on when the set threshold value is overshot and switches

off when the set threshold value is undershot at a hysteresis of 25%. At the same time, a wireless telegram EIN or AUS is transmitted.

Lock settings:

Press MODE and SET together briefly and lock the flashing LCK in Field 1 by pressing SET. To unlock, press MODE

and SET together for 2 seconds and confirm the flashing UNL in Field 1 by pressing SET.

Wireless telegrams:

Within 20 seconds, a power telegram is sent if the power changes by minimum 10%. A switchover from HT

to NT is transmitted immediately in the same way as a meter reading change. A full telegram comprising meter reading HT, meter

reading NT and power is transmitted 20 seconds after the power supply is switched on and then every 10 minutes. The LED lights up

briefly when a telegram is transmitted.

The power display in Field 2

depends on the number of S0 pulses per kWh of the meter. The minimum load displayed is

14 watts at 2000 pulses per kWh, 28 watts at 1000 pulses/kWh, 35 watts at 800 pulses/kWh, 280 watts at 100 pulses/kWh and

2800 watts at 10 pulses/kWh.