Form No. 003-2282 Rev G
16
3.4.
Terminal Block Explanation
OUTPUT
INPUT
G2
N22
L22
N21
L23
L21
G1
N1
L12
L11
N22, L22, N21, L23, L21 : UPS OUTPUT
L11 : (not connected, used for Dual Input Only)
G2 : OUTPUT EARTH GROUND
L12-N1 : UTILITY INPUT
G1 : INPUT EARTH GROUND
L11: Not Connected; (L11) Used as bypass input on Dual Input
Model (DIM) units only.
(Models SCxxx21T and SCxxx22T are NOT DIM)
L12-N1: Utility Input power when the UPS is running in Utility
mode. Also provides bypass on Models SCxxx21T and
SCxxx22T.
G1: UPS Input Ground.
L21
、
L23
、
N21
、
L22
、
N22: UPS Output.
G2: UPS Output Ground.
Remarks:
Input Connection
1. Connect the utility AC source to UPS from L12-N1 terminal.
Output Connection(s)
2. When an Isolation transformer is NOT installed, the UPS output terminals
will be L22-N22 (Models SCxxx22T).
Output voltages for these models
are selectable from 200, 208, 220, 230, and 240Vac.
3. When the Isolation transformer is installed (Models SCxxx21T):
Output
voltage on the front panel
display represents “Inverter” output, which
is the input to the isolation transformer, not the UPS output.
a. For 120V/120Vac system (2 branches of 120V, each at ½ total rated kVA)
L22-N22 120V
L21-N21 120V
N22
L22
N21
L23
L21
120V
120V
