8 dry contacts, 1 input dry contacts, X3 ancillary control and alarms – Emerson Liebert NX 50 and 60 Hz User Manual
Page 24: Figure 3 input dry contacts, Table 3 input dry contacts at x3, Dry contacts, Input dry contacts, Figure 3, Table 3, Input dry contacts at x3
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.
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 terminal 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.
Figure 3
Input dry contacts
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.
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 50m (82-164 ft.) 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