UPS Electrical Installation
13
Liebert
®
e
XL
™
2.4.1 Dry Contacts
Table 1
UPS Digital Inputs
Item
Terminal
Block
Pin
Connects to
(Description of External Item)
Maintenance Bypass Breaker (MBB)
TB2
1
MBB Aux Contact, Closed = CB Is Closed
TB2
2
MBB Aux Contact Common
Maintenance Isolation Breaker (MIB)
TB2
3
MIB Aux Contact, Closed = CB is Closed
TB2
4
MIB Aux Contact Common
Bypass Isolation Breaker (BIB)
TB2
5
BIB Aux Contact, Closed = CB is Closed
TB2
6
BIB Aux Contact Common
Not Used
TB2
7
—
TB2
8
—
Not Used
TB2
9
—
REPO/EPO (N.O.)
TB2
11
REPO Switch, Normally Open Contact
TB2
12
REPO Switch, Normally Open Common
REPO/EPO (Form-C or N.C.)
TB2
13
REPO Switch, Normally Closed Contact
TB2
14
REPO Switch, Normally Closed Common
REPO/EPO (Form-C)
TB2
15
REPO Switch, Normally Open Contact
Key Status
TB2
17
Key Status Switch, Closed = Key Released
TB2
18
Key Status Switch, Common
Not Used
TB2
19
—
TB2
20
—
1. All contacts have:
Maximum voltage: 24VDC
Maximum current: 10mA
Wire range: #14-22AWG
Maximum length: 500' (150m)
2. All external wire furnished by others
3. All wiring must be in accordance with national and local electrical codes.
4. If using REPO/EPO with Form-C contacts, Pins 13-15 must be used.
5. If using REPO/EPO with normally closed (N.C.) contacts only, a jumper must be placed across Pins 13 and 14.
Table 2
UPS Output
Item
Terminal
Block
Pin
Connects to
(Description of
External Item)
Maximum
Voltage
Maximum
Current
Wire
Range
Maximum
Length
SKRU Enable
TB3
1
Maintenance Bypass
Cabinet, Common
120VAC
1A
#14AWG 164ft (50m)
2
Normally Closed (NC)
3
Normally Open (NO)
1. To prevent signal interference, low-voltage (<48V) and low-current (5A) cable groups should be run in separate, grounded
conduit from high-voltage or high-current cable groups.
2. All external wire furnished by others.
3. All wiring must be in accordance with national and local electrical codes.
