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SPEED RELAY WIRING DIAGRAM (SIMPLIFIED) -
The diagram below is a simplified wiring diagram for connecting the WDA sensor to a 4B Rotech Speed
Relay (Model SR2V5-1). See speed relay and other applicable instructions for complete set-up and
installation information.
WDA Sensor
1 2 3 4 5 6
7 8 9 10 11 12
Speed Relay
Control Module
SR2V5-1
X
WHITE
ORANGE
RED
BLUE
BLACK
GREEN
N
L
Fuse 2A
110 VAC When Running
0 VAC When Stopped
110 VAC Supply
From Motor Starter
No Connection
Continuous Output
0 VDC Running
12/24 VDC Stopped
Insulate And Do
NOT
Connect
Contacts Shown In
Underspeed / Stopped
State. Relay Energized
When Running And
De-energized If Speed
Falls Below The Set
Speed.
