User Manual

Installation/Wiring 1-9
Figure 1.7 Control Terminal Block TB1A (located on precharge control board)
Control Wiring
Requirements
Important points about control wiring:
Use Tinned-Copper wire only. Wire gauge requirements and
recommendations are based on 75°C (168°F). Do not reduce wire gauge
when using higher temperature wire.
Wire with an insulation rating of 600V or greater is recommended.
Control wires outside the cabinet should be separated from power wires
by at least 0.3 meters (1 foot).
Drive Run Interlock
To protect the DC SCR Precharge Module from over-temperature failure,
the normally closed contacts of the thermo-switches on the DC SCR
Precharge Module should be wired to the Drive Run interlock circuit
(“Enable Input” or “Auxiliary Input”). This will ensure that the drive(s) are
stopped if a DC SCR Precharge Module over-temperature failure occurs.
Terminal
No.
Wiring Description Notes
1 +DCin
(1)
(2)
(1)
Refer to Appendix A for contact rating.
(2)
Terminal TB1A-1 is supplied jumpered to +DCin, and TB1A-2 is supplied jumpered to +DCout.
Wiring to these terminals by the user is not required.
+DC (positive) Bus Input Power
2 -DC
(1)
(3)
(3)
Terminal TB1A-2 must be wired to -DC of the drive by the user.
-DC (negative) Bus Power
3 +DCout
(1)
(2)
+DC (positive) Bus Output Power
2
1
3
CR
TB1A
8765
4321
9
14
12 11 10
13