15 Relays
SMA America, LLC
140
SI4548_6048-US-TB_en-13
Technical description
15 Relays
The Sunny Island offers you several options for the control of internal and external processes. For this
purpose, two relays are integrated into the device, to which you can assign functions using the
parameters "241.01 Rly1Op" and "241.02 Rly2Op" (see Section 6.4.4 "Multifunction Relay 1 and
2", page 55).
The different settings have the following meanings:
Function/
Setting
Meaning
Function description
Off
Off
Relay remains permanently switched off
(deactivated).
On
On
Relay remains permanently switched on (e.g. relay
function test during commissioning).
AutoGn
Automatic generator request The generator is automatically activated due to set
criteria (see Section 14.1.5 "Automatic Generator
Operation", page 122).
AutoLodExt
Automatic load shedding
dependent on an external
source
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 102).
AutoLodSoc1 Auto LoadShedding Soc1
Automatic connection/disconnection of loads.
Connection only if Lod1Soc limits are exceeded
(see Section 12.1 "Load Shedding", page 102).
AutoLodSoc2 Auto LoadShedding Soc2
Automatic load disconnection. Connection only if
Lod2Soc limits are exceeded (see Section 12.1
"Load Shedding", page 102).
Tm1
Timer 1 (time-controlled
switching of relay 1)
Programmable timer (once, daily, weekly) with
duty cycle.
Tm2
Timer 2 (time-controlled
switching of relay 2)
Programmable timer (once, daily, weekly) with
duty cycle.
AptPhs
Absorption phase is active
Relay switching when battery charge is in
absorption phase.
GnRn
Generator active
Relay switching when generator is in operation
and connected.
ExtVfOk
External voltage and
frequency is OK
External voltage and frequency are within the valid
range for connection.
GdOn
Utility grid
Relay switching when utility grid is available and
connected.
Summary of Contents for Sunny Island 4548-US
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