Relays - SMA SUNNY ISLAND 4548-US Operating Manual

15 Relays

15 Relays

The Sunny Island offers you several options for the control of internal and external processes. Two
multi-function relays are integrated into the device to which you can assign functions using the
parameters "241.01 Rly1Op" and "241.02 Rly2Op" (see Section 6.4.6 "Multifunction Relay 1 and
2", page 58).
The different settings have the following meanings:
Function/ Meaning
Setting
Off Off
On On
AutoGn Automatic generator request The generator is automatically activated due to set
AutoLodExt Automatic load shedding
dependent on an external
source
AutoLodSoc1 Auto LoadShedding Soc1
AutoLodSoc2 Auto LoadShedding Soc2
Tm1 Timer 1 (time-controlled
switching of relay 1)
Tm2 Timer 2 (time-controlled
switching of relay 2)
AptPhs Absorption phase is active
ExtPwrDer External power reduction
GnRn Generator active
140 SI4548-6048-US-BE-en-21
SMA Solar Technology America LLC
Function description
Relay remains permanently switched off
(deactivated).
Relay remains permanently switched on (e.g. relay
function test during commissioning).
criteria (see Section 14.1.5 "Automatic Generator
Operation", page 123).
Automatic connection / disconnection of loads.
Connection occurs if the device is connected to an
external source (e.g. generator), or if the Lod1Soc
limits are exceeded (see Section 12.1 "Load
Shedding", page 103).
Automatic connection / disconnection of loads.
Connection only if Lod1Soc limits are exceeded
(see Section 12.1 "Load Shedding", page 103).
Automatic load disconnection. Connection only if
Lod2Soc limits are exceeded (see Section 12.1
"Load Shedding", page 103).
Programmable timer (once, daily, weekly) with
duty cycle.
Programmable timer (once, daily, weekly) with
duty cycle.
Relay switching when battery charge is in
absorption phase.
The Sunny Island controls additional loads in order
to put excess energy to practical use. When
excessive energy can be used, the multifunction
relay is activated.
Relay switching when generator is in operation
and connected.
Operating Manual