Essential Services; Description; Settings; Wiring Example For Essential Services - Siemens SED2 VFD Operating Instructions Manual

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 All safety circuits are no
longer active (including motor overload and safety inputs to the Controller board).

Settings

The Essential Services feature requires that Controller board
DIP Switch 1 is set ON.
NOTE: The Essential Services indicator is on steady.
Essential Services does not require SED2 parameter settings. The Essential Services feature
simply puts the Electronic Bypass Option into override bypass mode no matter what
operation is selected.
Wiring Example for
Essential Services
Siemens Building Technologies, Inc.
DIGITAL INPUTS
Customer
Essential Services
Initiation
Application Feature Setup
1
2
3
4
5
6
7
8
Essential Services
9
10
11
12
J2
23