Electrical Connections - Emerson Fisher L2e Instruction Manual

L2e Controller
June 2022

Electrical Connections

WARNING
For explosion­proof applications, disconnect power before installing, servicing or removing electrical components.
Personal injury or property damage from fire or explosion may result if power is not disconnected.
Select junction boxes, wiring and/or cable glands that are rated for the environment of use (such as hazardous location,
ingress protection, and temperature). Failure to use properly rated electrical hardware wiring and/or cable glands can
result in personal injury or property damage from fire or explosion. Wiring connections must be in accordance with local,
regional, and national codes for any given hazardous area approval. Failure to follow the local, regional, and national codes
could result in personal injury or property damage from fire or explosion.
An electrical 1/2-14 NPT conduit connection with 0.5 meters (greater than 18 inches) of 18 AWG lead wires is located
at the bottom of the case. The conduit connection is integral to the body of the switch.
The Electronic Switch has Normally Closed (NC) and Normally Open (NO) outputs. The Switch electronics is housed in
Explosion/Flame proof and dust explosion proof enclosure.
The action of the controller is such that the switch contacts activate a dump valve when the fluid level exceeds the
high trip point, and remain in that state until the level falls below the low trip point. At the low trip point the switch
contacts de-activate or close the dump valve. The contacts remain in that state until the level builds up to the high trip
point again.
Connect L2e electrical wires as shown in table 2. To reverse the action refer to table 2 and reverse wiring for normally
open and normally closed.
Table 2. L2e Electrical Wire Color Code
Wire Color
White/Red
White/Black
Red
Brown
Blue
Green
6
Description
DC Supply +
DC Supply -
Normally Closed Contact
Common Contact
Normally Open Contact
Ground (Housing, Safety)
Instruction Manual
D103531X012