Siemens SED2 Operations Instructions download pdf (Page 27)

Application Feature Setup

Overview

The Controller board supports six isolated

digital inputs and six digital relay outputs for

customer use (Figure 10). The digital inputs

include: Remote Start Input, Remote Safety #1

and #2, Interlock Start, Essential Services, and

Overload Trigger. The digital outputs include:

•

VFD Fault

Programmable Output

Drive Select

Bypass Select

Bypass Running

Overload Fault

VFD Fault, NO

COM

Programmable Output, NO

COM

Drive Select, COM

Bypass Select, COM

Bypass Running, COM

Overload Fault, COM

DIGITAL

OUTPUTS

DIGITAL

INPUTS

Remote Start Input

Remote Safety #1

Remote Safety #2

Interlock Start

Essential Services

Overload Trigger

VFD0114R1

Figure 10. Controller Board Digital Inputs and

Outputs.

Auto Bypass without Interlock

Description

The Auto Bypass feature enables the SED2 to initiate automatic bypass mode operation.

Closing of the SED2 Relay sends the motor to hand bypass mode. See the SED2 VFD

Operation & Maintenance Manual (Document No. 125-3202) for programming of this relay

and for its desired action.

When the SED2 VFD initiates bypass mode operation, the following occurs:

The VFD stops delivering power •

•

The output contactor opens.

The bypass contactor closes and the Programmable Output on the Controller board

closes.

NOTES:

1. All safety conditions must be met for bypass mode operation.

2. The input contactor remains energized.

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Siemens SED2 Operations Instructions Page 27

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