Control wiring requirements, Drive run interlock – Rockwell Automation 20D DC SCR Precharge Module User Manual
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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)
(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
—
(3)
(3)
Terminal TB1A-2 must be wired to -DC of the drive by the user.
-DC (negative) Bus Power
3
—
+DC (positive) Bus Output Power
2
1
3
CR
TB1A
8 7 6
5
4 3 2 1
9
14
12 11 10
13