Liebert Hipulse E - Alarm Outputs (X4); X2 Extension

User Manual Liebert Hipulse E Chapter 12 – Additional Equipment
Single or '1+N' UPS System
(07/04) Page 12-5
12.3.3 Alarm Outputs (X4)
In addition to the AS400 alarm outputs the Interface Board also contains a number of relays whose contacts provide a set
of volt-free alarm outputs that are connected to terminal block X4 as shown in figure 12-2. These outputs can be used to
drive an external alarms monitoring device. Maximum contact rating on terminals = 50 Vdc @ 1A.
The alarms in question are:
• Bypass failure
 (RL-K1)
This alarm is active when the bypass voltage is low (undervoltage alarm), the bypass voltage is high (overvoltage
alarm) or absent; or the bypass-side static switch is selected blocked via the Operator Control Panel menuing system.
• Low battery (pre-alarm) or Battery CB open
 (RL-K2)
This alarm is active when the battery breaker is open, the battery fuse is open or the Low Battery alarm is active.
• Load on static bypass
 (RL-K3)
This warning message signals that the load is supplied by the static bypass and not protected by the distortions of the
mains supply. This signal is opposed to 'LOAD ON INVERTER' on relay K5. The signal is normally present when the
UPS is in ‘ECOMODE’ and running in normal operating conditions.
• Load on maintenance bypass
 (RL-K4)
This status message signals that the load is supplied by the maintenance bypass line and that it is not protected by the
distortion of the mains supply. The alarm is enabled by the closing of the maintenance manual bypass switch (Q3).
• Load on inverter
 (RL-K5)
This status message signals that the load is normally supplied by the inverter.
Note: When using the above contacts for remote alarm annunciation, the power supply for the remote indicators
must be provided from an external power source. Under no circumstances should the UPS internal low voltage supplies be
used for this purpose.
12.3.4 X2 Extension
The X2 connection on the board is provided to interface to the Extension Alarms Interface Board (P\N 4590056Q),
which is described next.