Eltako RS485 Bus Three Phase Energy Meter User Guide
- July 30, 2024
- Eltako
Table of Contents
Eltako RS485 Bus Three Phase Energy Meter User Guide
Only skilled electricians may install this electrical equipment otherwise there is the risk of fire or electric shock!
Temperature at mounting location: -25°C up to +70°C.
Storage temperature: -25°C up to +70°C.
Relative humidity: annual average value <75%.
valid for devices from production week 33/23
(see bottom side of housing)
RS485 bus three-phase energy meter.
Maximum current 3×80 A. Standby loss 0,8 W at L1 and only 0,5 W at L2 and
L3 each.
Modulair device for DIN-EN 60715 TH35 rail mounting in distribution cabinets
with IP51 protection class. 4 modules = 70 mm wide and 58 mm deep.
Accuracy class B (1%). With RS485 interface.
It measures active energy by means of the current between input and output.
The internal power consumption of 0,8 W or 0,5 W active power per path is
neither metered nor indicated.
1, 2 or 3 phase conductors with max. currents up to 80 A can be connected.
The inrush current is 40 mA.
The terminals mL1 and N must always be connected.
Connection via a FBA14 to the Eltako RS485 bus with a 2-wire shielded bus
cable (telephone cable). For the last meter in the RS485 bus, the
enclosed terminating resistor (120 Ω) must be connected to the RSA/RSB
terminals. The meter reading and the momentary capacity are transferred to the
bus – e.g. for transfer to an external computer or a controller – and is also
transferred to the wireless network via the FAM14.
The consumption value is stored in non-volatile memory and is displayed again
immediately after a power failure.
The 7 segment LC display is also legible twice within a period of 2 weeks
without power supply.
Power consumption is indicated using a LED next to the display flashing 1000
times per KWh.
Designed as standard for using as double-tariff meter: Switch over to a
second tariff by applying 230 V to terminals E1/E2.
On the right next to the display are the keys MODE and SELECT. Press them to
scroll through the menu. First the background lighting switches on. The
display then shows the total active energy per tariff, the active energy of
the resettable memory RS1 or RS2 as well as the instantaneous values of
consumption, voltage and current per phase.
Error message (false)
When the phase conductor is missing or the current direction is wrong ‘false’
and the corresponding phase conductor are indicated on the display. In
addition, the display flashes if the current direction is incorrect.
A device address for the DSZ14 has to be assigned from the FAM14, to hand the telegrams of the DSZ14 over to the bus.
Assign device address for the DSZ14:
Normal display: Briefly press the SELECT button, the backlight is switched on.
If the SELECT button is pressed longer than 3 seconds, the device address
appears in the display. Now turn the rotary switch on the FAM14 to position 1
within 60 seconds, its lower LED flashes red. Once the address is assigned by
the FAM14, its lower LED lights green for 5 seconds and the normal display
appears again on the DSZ14.
Delete device address of the DSZ14:
Normal display: Briefly press the SELECT button, the backlight is switched on.
If the SELECT button is pressed longer than 3 seconds, the device address
appears in the display. Now hold the SELECT button for 5 seconds, the device
address is set to zero.
Transmit teach-in telegram:
Normal display: Briefly press the SELECT button, the backlight is switched on.
If the SELECT button is pressed longer than 3 seconds, the device address
appears in the display.
By briefly pressing the MODE button, a teach-in telegram and a data telegram is sent. The FAM14 has to be operated in position 2 or 5, to sent the telegrams of the DSZ14 into the Eltako Wireless Building.
A data telegram containing meter reading, power and serial number is automatically sent and cyclically transmitted every 10 minutes after switching on the supply voltage.
If you change the meter reading by 0.1 kWh, the meter reading telegram is sent.
PcH is the value (factory setting 200 watts) of the power change required for the meter to send a power telegram immediately.
Change PcH value:
Short press the MODE button, the backlight will turn on.
Then press the MODE button repeatedly until PcH appears on the display.
Now briefly press the MODE and SELECT buttons together. The first digit of the
number flashes. MODE increases the number and SELECT decreases the number.
Between 10 to 100 in increments of 10 and from 100 to 1000 in increments of
100. If no more keys are pressed, the current value is saved after 5 seconds.
With MODE you get back to the normal display.
Within 20 seconds after a change in power of at least 10%, a power telegram is
sent.
The DSZ14 can be read-out with the PC tool PCT14.
The serial number, meter reading tariff 1, resettable meter reading tariff 1,
meter reading tariff 2 and resettable meter reading tariff 2 will be
displayed.
Change PcH value:
Short press the MODE button, the backlight will turn on.
Then press the MODE button repeatedly until PcH appears on the display.
Now briefly press the MODE and SELECT buttons together. The first digit of the
number flashes.
MODE increases the number and SELECT decreases the number. Between 10 to 100
in increments of 10 and from 100 to 1000 in increments of 100. If no more keys
are pressed, the current value is saved after 5 seconds. With MODE you get
back to the normal display.
Within 20 seconds after a change in power of at least 10%, a power telegram is
sent.
The DSZ14 can be read-out with the PC tool PCT14.
The serial number, meter reading tariff 1, resettable meter reading tariff 1,
meter reading tariff 2 and resettable meter reading tariff 2 will be
displayed.
Meter special operating modes:
In the meter operating modes of the FAM14, the focus is on the adjustable
transmission speed of electricity meter data for external building energy
managers.
Data can be accessed and forwarded via gateways connected to the FAM14 (FGW14, FGW14-USB, FGW14W(L)-IP).
Additional setting options are available on the FAM14 for meters from production week 33/23.
Typical connection:
Technical data
- The carrying capacity of cables and wires is defined in DIN VDE 0298-4.
- The torques for screw terminals are mentioned in DIN EN 60999-1.
To avoid damages at the energy meter, the recommended torque values for each terminal must not be exceeded!
Manuals and documents in further languages:
https://eltako.com/redirect/DSZ14DRS-3*80A_MID
Menu guidance
Must be kept for later use!
We recommend the housing for operating instructions GBA14.
ELTAKO GmbH
D-70736 Fellbach
Technical Support English:
+49 711 943 500 25
technical-support@eltako.de
eltako.com