Salicru DC POWER-S DC-36-S, User Manual

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SALICRU

By default the standard dry contacts from 1 to 3 are preset from 

factory, being able to reprogram them. The other 6 are optional 

and programmable too, being able to set one of the available 

alarms in the system or to associate more than one alarm to the 

same dry contact.

5.2.2.2.  COM ports.

There are two RS232 ports supplied through DB9 connectors 

and labelled as COM1 and COM2. In case of installing the tele-

maintenance SICRES card option, COM1 is disabled.
Also, there is a RS485 in COM3 port, which is supplied in 3 pins 

connector.
The RS232 from COM2 channel and RS485 from COM3 

channel are mutually exclusive between them, so they can't be 

used at the same time.

5.2.2.3.  Telemaintenance SICRES card (option).

The telemaintenance SICRES card allows monitoring, analysing 

and giving technical support in real time, 24 hours per day, 7 days 

a week by professionals of our firm, decreasing the MTTR (Mean 

Time To Repair) against any unexpected event.
During the monitoring, a data logger of the events and alarms 

is generated, which allows an exhaustive analysis of the equip-

ment,  giving a valuable information of the operating trend, so in 

this way the potential future problems can be identified. Likewise, 

each month, it is sent a detailed report to the client of the status 

of the equipment.

5.2.3.  Operating modes.

• 

Normal mode. 
Load is supplied from rectifier modules directly. Meanwhile 

the system takes the energy from the AC electrical commer-

cial mains and supplies DC energy to the loads. At the same 

time, batteries are kept on floating mode, because they are 

connected in parallel with the output of the system. For those 

cases that the system is overloaded, battery will take any in-

rush current that system is not able to supply. 

• 

Emergency mode.
In case of mains fault, the connected load to the system is still 

being supplied, but now by the batteries instead of the recti-

fier modules. There is not any break in the power supply to 

the loads, during the transference from normal to emergency 

modes and vice versa. 

• 

Recharging mode.
When the electrical mains is restored, the rectifier starts auto-

matically and recharges the batteries and supplies the loads 

at the same time. It means that the DC output voltage will 

always be the same as the battery voltage.

5.2.4.  Cycling function and Smart mode.

Usually the system is sized to the estimated power of the loads, 

plus the battery charging current and finally the redundant mod-

ules are added to the system. But in most of the cases, as the 

rectifier modules are connected in parallel and sharing the load, 

all of them works at half power, which means having a lower ef-

ficiency. 
To solve this phenomena, the Control Module includes the Smart 

mode. This operating mode entail in shutdown the redundant 

modules and any of those ones that are not needed to, in order 

to get the correct quantity of modules operating at the maximum 

efficiency level (this figure can be set through the LCD panel). 

In case of failure of any of them, the Control Module will start up 

any of the shutdown modules (on Standby) to replace the faulty 

module. This way, an optimal efficiency of the system is get along 

its lifetime. 
In order to age all the parts and elements equally when the Smart 

mode is enabled, the Control Module has the cycling function. 

This function entails in swapping the shutdown modules with the 

ones that are already started up, therefore the aging is the equal 

for all of them. The preset cycling period is 10 hours, neverthe-

less the client can set it at the required time.

SMART-mode.

Load sharing on normal operating.

Rectifier load sharing and cycling on Smart mode.

Fig. 15. 

Graphic of the possible operating modes of the system.

5.2.5.  Battery.

Even tough the AC input mains fails, the equipment will operate 

as an autonomous power supply, by providing voltage to the load 

connected at the output of the equipment, because it has a bat-

tery that will supply the energy.
To keep the battery in the optimal status, the system monitors the 

current and voltage of the battery at any time, as well as the tem-

perature of the battery room to make the corresponding compen-

sations,  in order to prolong the battery lifetime to the maximum.
A low voltage contactor protects the batteries from being com-

plete depleted, avoiding their irreversible deterioration, particu-

larly in the PbCa batteries.
The system can charge any type of batteries of PbCa or NiCd, 

either sealed or with maintenance. A electrolyte level probe can 

be added, as an option, to the batteries with maintenance, which 

will  trigger an alarm in case of low electrolyte level in the battery 

cells.
The rectifier cabinet has protections in both poles, which as well 

as its own functionality, it allows connecting and disconnecting 

the battery set to the rectifier.