SMA Solar Technology AG
Relay
Technical Description
SBU2200-TEN083320
131
17 Relay
The Sunny Backup 2200 provides you with various options to control internal and external
operations. For this purpose, two relays are integrated into the device with which you can assign
functions using the "241.01 Rly1Op" and "241.02 Rly2Op" parameters. Information on the
connection of both relays is provided in section 7.6.2 „Multi-function Relay 1 and 2“ (65). The
different settings have the following meanings:
Function/
settings
Meaning
Functional description
Off
off
relay remains permanently switched off
(deactivated)
On
on
relay remains permanently switched on (e.g. relay
function test during commissioning)
AutoLodExt
automatic load shedding with regard to an external
source
automatic connection / disconnection of loads
connection only occurs if the device is connected to
an external source (e.g. generator), or if the
absorption phase is active
AutoLodSoc1
Auto LoadShedding Soc1
automatic connection / disconnection of loads
load is only connected if SOC limit 1 has exceeded
the set value again
AutoLodSoc2
Auto LoadShedding Soc2
automatic load disconnection
load is only connected if SOC limit 2 has exceeded
the set value again
Tm1
timer 1 (time-controlled switching of relay 1)
programmable timer 1 (once, daily, weekly) with
duty cycle
Tm2
timer 2 (time-controlled switching of relay 2)
programmable timer 2 (once, daily, weekly) with
duty cycle
Apt-Phs
absorption phase active
relay is switched if battery charging is in the
absorption phase
ExtVfOk
external voltage and frequency is OK
external voltage and frequency are within the valid
range for connection
GdOn
public grid
relay is switched if public grid is available and
connected
Alm
alarm
Sunny Backup 2200 has a fault; in case of fault,
contact is open (relay is deactivated)
Rn
run
Sunny Backup 2200 is in operation, contact is
closed (relay is activated) if the device is running in
inverter operation
BatFan
battery fan
relay is used for automatic battery room ventilation
(switching the fan)
AcdCir
acid circulation
relay is used for automatic acid circulation (switching
the electrolyte pump)
