Salicru SLC TWIN RT series User Manual

Contents

Salicru SLC TWIN RT series User Manual Manual pdf 27 page image

27SALICRU When the distance among the UPSs and the protec-tion panel is higher than 20 metres, the difference in thelength between the input and output cables of the equip-ments has to be lower than 10% .ŖŖŖInput circuit breakersOutput circuit breakersManual bypassUPS nr 1InputTo loadsUPS nr 2Fig. 16. Parallel installation of two TWIN RT UPSs from 4 to 10kVA, with protection and manual bypass panel.UPS nr 1UPS nr 2ŖŖŖInput and bypass circuit breakersOutput circuit breakersManual BypassInputTo loadsBypass lineFig. 17. Parallel installation of two TWIN RT UPSs from 4 to10 kVA, with bypass line and protection and manualbypass panel.4.3.10. Communication ports.4.3.10.1. RS232 and USB interfaces.Ŗ Communication line (COM) is a very low voltage circuitof safety. To preserve the quality, it has to be installedseparate from other lines that have dangerous voltages (energydistribution line).Ŗ RS232 and USB interfaces are used by the monitoring soft-ware and firmware updating.Ŗ It is not possible to use both ports at the same time.Ŗ Signal pin-out of the DB9 connector are shown in table 5.RS232 port consists in a serial data transmission, so an im-portant quantity of information can be sent through a com-munication cable of 3 wires.Ŗ Physical structure of RS-232. Pin 2. RXD. Serial data reception. Pin 3. TXD. Serial data transmission. Pin 5. GND. Ground of the signal.Pin # Description Input / Output2 TXD Output3 RXD Input5 GND InputTabla 5. Pin-out of the RS232 in the DB9 connector.Ŗ USB communication port is compatible with the USB 1.1 pro-tocol for communication software.4.3.10.2. Smart slot.Ŗ UPSs have a unique slot, hidden rear the cover stated in theviews of the equipment as "Smart slot", and allows insertingany of the following options cards: SNMP for control via Web. Remote UPS management through Internet or Intranet. Relays interface (for more details see the next section).Ŗ For more information, contact with our S.T.S or our nearestdistributor.4.3.10.3. Relays interface (option).Ŗ Communication line (COM) is a very low voltage circuitof safety. To preserve the quality, it has to be installedseparate from other lines that have dangerous voltages (energydistribution line).Ŗ UPS has a dry contact card for the relays interface commu-nication protocol, it provides digital signals in a free potentialway, with a maximum applicable voltage and current of 240V ac or 30 V dc and 1A.Ŗ This communication port makes possible the dialogue be-tween the equipment and other machines or devices, throughthe 5 dry contacts supplied in the terminal strip included inthe same card and to each one of them an alarm of the 8available can be assigned (see table 6).Also there are other three additional terminals with only onecommon, for an installation of an external On/Off switch tothe UPS and a third one with free setting among EPO, Shut-down or "On-Off" remote control.From factory all contacts are normally opened, being ableto set them separately one by one, by means of the HyperTerminal software or equivalent.