Siemens SED2 VFD Electronic Bypass Option 125-3208 - Manual (Page 50)

SED2 VFD Electronic Bypass Option Operating Instructions
42 Siemens Building Technologies, Inc.
Application Feature Setup
Overview
The Controller board supports six
isolated digital inputs and six digital relay
outputs for customer use (Figure 13).
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
Programmable Output, NO
COM
NC
VFD Fault, NO
COM
NC
Drive Select, COM
NO
Bypass Select, COM
NO
Bypass Running, COM
NO
Overload Fault, COM
NO
DIGITAL
OUTPUTS
DIGITAL
INPUTS
J2
J1
13
14
15
16
17
18
19
20
21
22
23
24
25
26
1
2
3
4
5
6
7
8
9
10
11
12
Remote Start Input
Remote Safety #1
Remote Safety #2
Interlock Start
Essential Services
Overload Trigger
VFD0114R2
Figure 13. 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 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.