EXTERNAL POWER AND CONTROL CONNECTIONS
Figure 6.4: HiPerGuard MV UPS system EPO customer interface
6.4.4.2. Start, stop, and reset inputs
The HiPerGuard MV UPS can be controlled remotely through digital inputs.
The stop input is active low level triggered, which means that a transition from 24 Vdc to 0 V will
command the HiPerGuard MV UPS to stop. If the control via DI is not required, the terminals X11:5 and
X11:6 on the APS enclosure shall be linked out. The stop input is a "maintained" operator switching type.
The start input is active high level triggered; hence a transition from 0 V to 24 Vdc will command the MV
UPS to start. Please note that the MV UPS will not start if either the EPO or stop command is active
(open circuit between terminals X11:1 and X11:2 for EPO and X11:5 and X11:6 for stop). If the start control
via DI is not required, the terminal X11:3 and X11:4 shall be kept open.
The reset input is activated on the rising edge, which means that a transition from 24 Vdc to 0 V will
reset all inactive warnings and faults. A reset command can be applied at any time. If unused, the
terminals X11:7 and X11:8 must be kept open.
The start, stop, and reset commands coming from the digital inputs are tracked independently, and will
be differentiated from those coming from the GDM on the event log.
Figure 6.5: HiPerGuard MV UPS start, stop and reset digital inputs
To Next Page
Loading...
