Siemens 125-3208 operating instructions Essential Services, Wiring Example for Interlock

SED2 VFD Electronic Bypass Option Operating Instructions

Wiring Example for Interlock

Customer

Proof

DIGITAL INPUTS

Remote Start Input

Remote Safety #1

Remote Safety #2

Interlock Start

1

2

3

4

5

6

7

8

9

J2

Power to Customer Device

VFD0115R2

DIGITAL OUTPUTS

Programmable Output, NO COM NC

10

11

12

13J1

Essential Services

Description

The Essential Services feature allows full-power bypass mode control of the motor during an emergency scenario. Activation of Essential Services overrides any other selected operation. Essential Services ensures that the bypass contactor will not open when a safety input or overload opens. Power goes directly to the motor.

NOTES:

1.If using both the Interlock and Essential Services features, Essential Services waits 10 seconds for the Interlock to confirm the safety condition (such as opening a damper). After the 10-second delay, Essential Services controls the motor regardless of the Interlock safety condition status.

2.Use extreme care when using the Essential Services mode. All safety circuits are no longer active (including motor overload and safety inputs to the Controller board).

46 Siemens Building Technologies, Inc.