User Manual
2253i / 2253iX
AMETEK
California Instruments
41
3.7.1 AC Input Connector – INPUT – TB3
See section 3.5 for details on connecting AC input power. Connector type is KULKA 9-85-03 C/I part
number is 240321.
Terminal
Designator
Connection Description
1
Line
AC Line
2
Neutral
AC Neutral
3
GND
Chassis Ground
Table 3-3: AC Line Input Terminal block.
3.7.2 Output Terminal Block – OUTPUT – TB1
Each chassis has a single AC output terminal block. The output terminal block must be covered using
the supplied AC Output safety cover. The terminal blocks are large enough to accommodate required
wire gauge sizes. The terminal block is located in the upper left corner on the rear panel of the unit.
(Looking from the back). Connector type is Magnum, A307104R50. C/I part number is 250809. The
use of spade or ring lugs is recommended.
Terminal
Designator
Connection Description
1
øA Output
Output Load High Phase A
2
øB Output
Output Load High Phase B
3
øC Output
Output Load High Phase C
4
N Output
Output Load Low Neutral
Table 3-4: Output Terminal connections.
3.7.3 External Sense Connector– INPUT – TB2
If external sense mode is used, sense connections should be made to the four-pin sense connector. A
mating connector (ALTECH 37.004/BLK, C/I part number 410636) is provided as part of the shipkit.
The external sense connector is located near the center of the rear panel of the unit. Connector type is
ALTECH, 37-104/BLK. C/I part number is 410615.
Pin
Designator
Connection Description
1
øA Sense
Phase A sense input.
2
øB Sense
Phase B sense input.
3
øC Sense
Phase C sense input.
4
N Sense
Neutral sense input.
Table 3-5: External Sense connector
