Watlow DIN-A-MITE Style C Manual de usuario descargar pdf (Pagina 17)

WATLOW DIN-A-MITE Style C User's Manual

VÅ

Triac

RY1

Coil

Reset Switch

RY1A

RY1B

Normally open

Common

Normally closed

(External alarm relay

contacts, set A)

(External alarm relay

contacts, set B)

Latching Alarm Relay Circuit

System Wiring Example Ungrounded Delta or Wye Load 3-phase, 2-leg DIN-A-MITE

NOTE: The current transformers must be in the controlled legs on a 2-leg DIN-A-MITE. The

load wires must pass through the current transformers in the same direction.

Non-latching Alarm Option

(models DC_ _ -

_ _ S _ - H _ _ _ )

Open Heater and Shorted SCR Alarm

The shorted SCR detector compares the input

command signal and actual load current. If

load current is present without an input signal

then the shorted SCR alarm will energize a

triac (on board the DIN-A-MITE) output.

An open-heater or partial open-heater state is

detected when a command signal is present

and a reduced or no output current is detected.

The alarm output is then energized.

This is a non-latching alarm. This output can

be used to drive various indication devices,

such as a coil, light, buzzer, etc. See the

alternative latching circuit section below.

emiconductor

Fuses

High-limit

ontactor (CR1)

Current

Transformers

Delta

Load

Ungrounded

Wye Load

(ac)

120 or 240V~ (ac)

@ 300mA maximum

nergizes on alarm

From Temperature Control

Pin Y1+, W1- (page 16)

1 2 3

4 5 6

ignal Alarm

ain

Bias

Open

eater

imit

ALM

CT1

CT2

CT3

djustment

otentiometers

Alarm Relay

or Indicator

DIN-A-MITE

C20-48S0-H000

2-Leg

Zone

one

black

white

1 2 ... 12 13 14 15 16 17 18 19 20 21 22

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