Riello UPS MASTER HE, User Manual

Page: 19 / 57

0MNMHEM30RUENUB 00 pag. 19 / 57
3.3 Connection of signals and remote commands
To the position of the signal and remote connection, refer to the
“INSTALLATION DRAWINGS”
supplied with the
UPS.
3.3.1 EPO connector (emergency power off control)
If the jumper on the connector is opened, the voltage on the UPS
output will be cut.
The UPS is factory-fitted with the EPO terminals shortcircuited. If
this input is used, the UPS can be shut down in a hazardous
situation from a remote position simply by pressing a button.
If only the power supply is removed, for example by opening the
switch of the power supply panel, the UPS will keep the load
powered using the energy in the batteries
3.3.2 REMOTE COMMANDS AND ALARMS
The card is equipped with a terminal board with 12 positions which has the following:
POWER SUPPLY
1 power supply 12Vdc 80mA(max.) [pins 10 and 11];
ALARMS 3 potential-free change-over contacts for alarms;
COMMAND 1 command programmable from the panel [pins 11 and 12];
The functions of the three contacts and the command may be reprogrammed via the display panel. The ALARMS
and the COMMAND are factory-set in the following way:
- ALARMS
- RL1 Bypass / fault, the contact changes position when the UPS switches the load onto
the bypass line either during normal operation (e.g. due to overload) or as a
result of a fault in the inverter stage;
- RL2 Battery discharging, the contact changes position when the load is powered from
the battery due to a mains power failure;
- RL3 End of battery discharge, the contact changes position when, during a mains
outage, the remaining time for battery discharge has reached the minimum value
defined. Once this time has passed, the load will remain unpowered (the factory-
set end of discharge pre-alarm value is 5 minutes);
- COMMAND
IN 1 Inverter OFF. Connect pin 11 to pin 12 (for at least 2 seconds) .
- In “NORMAL OPERATION”,
if the INVERTER OFF command is received, the UPS switches the power supply
of the load onto the bypass line (load is not protected should there be a mains
outage).
- In “EMERGENCY OPERATION”,
if the STOP INVERTER command is received, the UPS shuts down (load is not
powered).
With the jumper present, the UPS remains switched on the bypass line when the
mains power supply is restored.
With no jumper present, the UPS will restart in NORMAL OPERATION.