Soft Start / Voltage Selection Overview; Soft-Start Operation; Figure 2-5: Soft-Start / Voltage Board; Table 2-3: Ac Input Power Connector (J1) Pin Assignment - Aerotech Npaq DL 4010 Series Hardware Manual

Npaq® Hardware Manual

2.4. Soft Start / Voltage Selection Overview

The Soft Start / Voltage Selection Board is used to limit AC inrush current during turn-on
provides the user with the means to configure the Npaq for different AC line voltages
board is normally accessible only by removing the top cover of the Npaq. If the -LineSel option is present; the
chassis cover will have access holes and labels indicating the switch settings.
For fuse information, refer to

2.4.1. Soft-Start Operation

Soft-Start circuitry automatically limits the inrush current to the Bus supply to approximately 10 A for
100/115 VAC operation and 20 A for 200/230 VAC operation. Inrush current limiting is only activated during
initial power-up or when AC power interruptions last longer than .3 seconds. Short power interruptions (less
than about .3 seconds) will not trigger the soft-start circuitry. This prevents the possibility of soft-start
induced nuisance circuit breaker trips during normal operation.
W A R N I N G : The Soft-Start circuit requires +24 VDC for proper operation (provided
internally). Damage to the Soft-Start circuit may result if +24 VDC is not connected.
Table 2-3: AC Input Power Connector (J1) Pin Assignment
Pin Description
1 AC LO
2 AC LO
3 AC HI
4 AC HI
36
Table 4-12.
Figure 2-5: Soft-Start / Voltage Board
Chapter 2
Installation and Configuration
(Section
(Section
Wire Color
Brown
Brown
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2.4.1.) and
2.4.2.). This
Blue
Blue