Electronic Bypass Controller Installation and Commissioning Guide
23
Electronic Bypass Control Functions
Type
Location
Description
Signal / Level Rating
Input Power
J10
5
120 Vac single phase (neutral)
120 Vac Single Phase
4
120 Vac single phase (hot)
Contactor Outputs
1
Input Contactor
2
Bypass Contactor
3
Output Contactor
VFD Connections
J11
1
Motor Overload Input
24 Vdc upon overload
2
Drive Fault Input
24 Vdc upon fault
3
24 Vdc Common to VFD
Drive common
4
Frequency Local/Remote
5
N/A
6
Run Command
7
VFD Reset
Relay Outputs
TB1
1
Power On
Closes when power is applied
2
Power On
3
Fault
Closes upon a fault condition
4
Fault
5
Damper
Activates Damper Solenoid
6
Damper
7
Auto
Closes when placed in Auto
8
Auto
Digital Inputs
TB2
1
Safety Tie 1
2
Safety Tie 2
3
Safety
NC Contact
4
Customer Reset
NO Contact
5
Auto Run
NO Contact
6
Fire
NC Contact
7
Fused 24 Vdc
8
24 Vdc Common
Digital Input Common
Digital Inputs
TB3
1
Remote Bypass
Remote Bypass Command
2
Remote VFD
Remote VFD Command
3
Damper Feedback
Feedback from end switch
4
Fireman’s Override
5
N/A
6
N/A
7
N/A
8
Positive logic ON
Power Supplies
TB4
24 Vdc Common
Digital Input Common
24 Vdc Common
Digital Input Common
24 Vdc Common
Digital Input Common
N/A
Contactor Supply 115 Vac Tie 1 115
Vac Tie 2
115 Vac to Contactors
115 Vac Tie (Hot)
115 Vac to Contactors
Analog Input
H300
6
External Speed Reference
4-20 mA
9
Speed Reference Common
M200
4
External Speed Reference
4-20 mA
6
Speed Reference Common
M400
6
External Speed Reference
4-20 mA
5
Speed Reference Common