Rockwell Automation 20D DC SCR Precharge Module - Manual (Page 18)

1-8 Installation/Wiring
Control Wiring and
Terminals Terminal blocks TB1A and TB2A contain connection points for control
wiring of the DC SCR Precharge Module.
Table 1.D Control Terminal Specifications for TB1A and TB2A
Figure 1.6 Control Terminal Block TB2A (located on precharge control board)
Name
Wire Size Range (1)
(1) Maximum/minimum sizes that the terminals will accept – these are not recommendations.
Torque
Maximum Minimum
Control Terminal Blocks
2.5 sq. mm
(14 AWG) 0.25 sq. mm
(22 AWG) 0.8 Nm
(7 lb.-in.)
Terminal
No.
Wiring Description Polarity Notes
1 Customer-
supplied 120 VAC or
24 VDC Input Phase For interlocking with input system power. See
Start-Up on page 2-2 for voltage selection. 2 Neutral
3 Customer-
supplied
120 VAC
Phase For supplying 120 VAC power to a cooling fan
4 Neutral
5
Customer-
supplied
120 VAC Phase
From external Normally Open contact that
energizes the Precharge Control Relay “CR”
6 Customer-
supplied Normally Open
contact
(1)
(1) Refer to Appendix A for contact rating.
—
Output contacts from the Precharge Control
Relay “CR”
7
8 —
Normally Closed
contact
(1)
—
Output contacts from the Precharge Control
Relay CR - “Precharge Enable”
9 Customer-
supplied Normally Closed
contact
(1)
—
Thermo switch’s contacts that open if the
Power Module has over-temperature failure
10
11
— — — Spare
12 Customer-
supplied Ground (GND) GND Ground for a cooling fan
3 1 2 4 5 6 7 8
10 11 12
9
F1
TB2A
1
2
Customer Side