© 2016 Littelfuse Protection Relays & Controls

Protection Relays

Current Monitoring Relays and Transducers

www.littelfuse.com/tcs

Rev: 1-A-062116

TCS SERIES

Description

The TCS Series is a low cost method of go/no go current

detection. It includes a solid-state output to sink or source

current when connected directly to a standard PLC digital input

module. Its normally open or normally closed output can also be

used to control relays, lamps, valves, and small heaters rated up

to 1A steady, 10A inrush. The TCS is self-powered (no external

power required to operate the unit) and available with an

adjustable actuation range of 2 - 20A or factory fixed actuation

points from 2 - 45A.

Operation

Normally Open: When a current equal to or greater than the

actuate current is passed through the toroidal sensor, the output

closes. When the current is reduced to 95% of the actuate

current or less, the output opens.

Normally Closed: When the current through the toroid is equal

to or greater than the actuate current, the output opens. When

the current is reduced below 95% of the actuate current, the

output closes. To increase sensitivity, multiple turns may be

made through the TCS’s toroidal sensor. The trip point range is

divided by the number of turns through the toroidal sensor to

create a new range. When using an external CT, select a 2VA,

0-20A output CT rated for the current to be monitored. Select

TCS adjustment range 0. Pass one secondary wire lead through

the TCS’ toroid and connect the secondary leads together.

Features & Benefits

FEATURES

BENEFITS

Self powered

No control voltage is required to operate the unit

Totally solid state

and encapsulated

No moving parts to arc and wear out over time and

encapsulated to protect against shock, vibration,

and humidity

Can connect directly

to PLC

Solid state output to sink or source current can

be connected directly to a standard PLC digital

input module

1A steady, 10A inrush

solid-state output

Provides 100 million operations in typical conditions

Complete isolation

between sensed current

and control circuit

Allows you to monitor a load in a separate

lectrical system

Current Sensor

Wiring Diagram

Ordering Information

MODEL

OUTPUT VOLTAGE

ACTUATE CURRENT

OUTPUT FORM

MODEL

OUTPUT VOLTAGE

ACTUATE CURRENT

OUTPUT FORM

TCSG2A

3 to 50VDC

Fixed, 2A

Normally open

TCSH2B

24 to 240VAC

Fixed, 2A

Normally closed

TCSGAA

3 to 50VDC

2-20A adjustable

Normally open

TCSH5B

24 to 240VAC

Fixed, 5A

Normally closed

TCSGAB

3 to 50VDC

2-20A adjustable

Normally closed

TCSHAA

24 to 240VAC

2-20A adjustable

Normally open

TCSH2A

24 to 240VAC

Fixed, 2A

Normally open

TCSHAB

24 to 240VAC

2-20A adjustable

Normally closed

If you don’t find the part you need, call us for a custom product 800-843-8848

Monitored AC conductor

must be insulated.

L1

N/L2

L1

N/L2

L1

N/L2

L = Load

V = Voltage

PS = Power Supply

PLC = PLC Digital Input Module

POSITIVE SWITCHING

SINKING

SOURCING

NEGATIVE SWITCHING

L1

N/L2