Application Feature Setup; Overview; Auto Bypass Without Interlock; Description - Siemens SED2 VFD Operating Instructions Manual

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

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
Startup, Operation, and Maintenance Manual (125-3201) for programming of this relay and
for its desired action.
When the SED2 initiates bypass mode operation, the following occurs:
•
The SED2 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.
Siemens Building Technologies
DIGITAL
INPUTS
DIGITAL Programmable Output, NO
OUTPUTS
Bypass Select, COM
Bypass Running, COM
Overload Fault, COM
Figure 10. Controller Board Digital Inputs and Outputs.
Application Feature Setup
J2
Remote Start Input
1
2
Remote Safety #1
3
4
Remote Safety #2
5
6
Interlock Start
7
8
Essential Services
9
10
Overload Trigger
11
12
J1
13
COM
14
NC
15
VFD Fault, NO
16
COM
17
NC
18
Drive Select, COM
19
NO
20
21
NO
22
23
NO
24
25
NO
26
19