Relay SMA Solar Technology AG
152 SI2012_2224-TEN082311 Technical Description
14 Relay
The Sunny Island offers you several options for the control of internal and external processes. For
this purpose, there are two relays integrated into the device to which you can assign functions using
the "241.01 Rly1Op" and "241.02 Rly2Op" parameters. Information on connecting the relays is
provided in section 7.6.3 "Multi-function Relays 1 and 2" (Page 63). The different settings are
explained as follows:
Function/
Settings
Meaning Function Desctription
Off Off relay remains permanently switched off
(deactivated)
On On Relay is permanently on (e.g., test of relay
function when commissioning)
AutoLodExt Automatic load shedding subject to an exter-
nal source
Automatic connection / disconnection of
loads Connection takes place only if the
device is connected to an external source
(e.g., generator) or 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 disconnection of loads load is
only connected if SOC limit 2 has exceeded
the set value again
Tm 1 Timer 1 (time-controlled switching of relay1) Programmable timer 1 (once, daily, weekly)
with duty cycle
Tm 2 Timer 2 (time-controlled switching of relay2) Programmable timer 2 (once, daily, weekly)
with duty cycle
Apt-Phs Absorption phase active Relay switching when battery charge is in
absorption phase
ExtVfOk External voltage and frequency OK Extrernal voltage and frequency are in valid
range for connection
GdOn Public grid Relay is switched if public grid is available
and connected
Alm Alarm Sunny Island has a fault; contact is open if
there is a fault (relay is deactivated)
Rn Run Sunny Island is in operation, contact is
closed (relay is activated) if the device is run-
ning in inverter operation
BatFan Battery Fan relay is used for automatic battery room ven-
tilation (switching the fan)
AcdCir Acid Circulation relay is used for automatic acid circulation
(switching the electrolyte pump)
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