8 dry contacts, 1 input dry contacts, Figure 3 input dry contacts – Liebert Emerson NX UPS System User Manual
Page 20: X3 ancillary control and alarms, Table 3 input dry contacts at x3, 2 maintenance bypass cabinet interface, Table 4 maintenance bypass cabinet interface, Dry contacts, Input dry contacts, Maintenance bypass cabinet interface
Single Module UPS Installation
12
1.8
Dry Contacts
The UPS provides input dry contacts and output dry contacts.
1.8.1 Input Dry Contacts
There are several input dry contacts at the X3 slot.
Figure 3
Input dry contacts
X3 Ancillary Control and Alarms
X3 IN DRY: Environmental, Battery Ground Fault and Generator Contacts
The UPS accepts external signalling from voltage-free (dry) contacts connected to finger-proof, push-in ter-
minal X3 IN DRY. Subject to prior software programming, the signalling is accepted by the UPS when
connection between the relevant terminal and the +12V terminal is altered. Cables connected to X3 IN
DRY must be segregated from power circuits (for screening purposes), double insulated and of a typical 0.5
to 1mm
2
cross-section area for maximum runs between 25 and 50 meters (82-164 ft), respectively.
1.8.2 Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 3
Input dry contacts at X3
Position
Name
Description
J4.1
ENV
3
Battery Room Alarm (NC)
J4.2
BtG
Battery Ground Fault Detection (NC)
J4.3
GEN
1,2
On Generator (NO)
J4.4
+12V
+12V Power
1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.
Table 4
Maintenance bypass cabinet interface
Position
Name
Description
J26.1
T_IT
1
Input transformer overtemperature (NC)
J26.2
AUX_I
Reserved
J26.3
+12V
+12V Power
J26.4
GND
Power Ground
J30.1
FUSE
Reserved
J30.2
F_FAN
Fan Fail Alarm (NC)
J30.3
T_OT
1
Output Transformer Overtemperature (NC)
J30.4
AUX_O
Reserved
1
- Must be configured by software before becoming active
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
2
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
X3
12V
J4
J26
J30
J10
12V
GE
N
Bt
G
EN
V
GN
D
AU
X
_I
T_
IT
FB
GN
D
F_
F
A
N
FU
S
E
OL
DR
V
12V
AUX
_O
T_
O
T
12V
12V
12V