Siemens 125-3208 operating instructions VFD0122R2

SED2 VFD Electronic Bypass Option Operating Instructons

VFD0122R2

					VFD DI#3		5	Remote Start/Stop
					VFD DI#2		8	Interlock Start Confirm
				Isolated 0V			28
VFD		Bypass			VFD DI#1		6	OK to Run
Input	Input	Hand				COM	25	SED2 Relay
On/Off	Contactor	Start	VFD DO#2, NO				24		SED2
	Bypass					COM	22	SED2 Fault
	VFD Contactor		VFD DO#1, NO				21		VFD

Enable

Overload

Remote

VFD INTERFACE

Start

Relay

Output

VFD DO#1, NO

1

J4

Contactor

COM

10

Motor

VFD DO#2, NO

2

STOP

AutoBypassEnabled

VFDFault

COM

9

RESET

SafetyFault

VFD DI#1

3

EssentialServices

OverloadFault

Isolated 0V

8

VFD DI#2

4

Enable Commanded Proofed

7

INTERLOCKSTARTLOGIC

VFD DI#3

5

NOTE:

KEYPAD INTERFACE

6

J3

3-Contactor

Keypad

Ribbon Cable for Keypad

MCU

Shown.

Pushbuttons and Indicators

Basic Sanity Test LED

J8

Factory Use Only

ON

OFF

DIP Switch

SW1

J2

CONTROLLER

Remote Start Input

1

BOARD

Remote Safety #1

2

3

4

DIGITAL

Remote Safety #2

5

INPUTS

Interlock Start

6

7

Essential Services

8

9

Overload Trigger

10

11

HIGH VOLTAGE

DIGITAL

12

J1

Programmable Output, NO

13

OUTPUTS

COM

14

FUSE

FUSE

NC

15

F3

F4

VFD Fault, NO

16

COM

17

NC

18

TRANSFORMER

Drive Select, COM

19

NO

20

HIGH VOLTAGE/

Bypass Select, COM

21

120V

NO

22

F1

Bypass Running, COM

23

STEP-DOWN

NO

24

POWER

Overload Fault, COM

25

J7

NO

26

TRANSFORMER

Override Jumper

J6

9

10

11

12

13 14

J5

8

3 2 1

7

6

5

4

3

2

1

FUSE

CONTACTOR

Bypass Contactor COM

Earth Ground

F2

Bypass Contactor NO Not Used

Output Contactor NO ISO IN6B

Output Contactor NC 120V Neutral

120V Neutral

CONTROLS

120V Hot

Input Contactor

120V Neutral

120V Hot 120V Neutral

120V Neutral

INPUT

ISO IN6A

120V Hot

CONTACTOR

OUTPUT

CONTACTOR

CUSTOMER

BYPASS

SUPPLIED

3-PHASE

CONTACTOR

POWER

INPUT DEVICE

OF VFD WITH

ELECTRONIC BYPASS

MOTOR

Figure 15. Controller Board Inputs and Outputs.

54 Siemens Building Technologies, Inc.