SI4548-US-10 Manual

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.