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Shorted scr alarm, Torque procedure – Watlow DIN-A-MITE Style D User Manual

Page 5

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WATLOW DIN-A-MITE Style D User’s Manual

5

Single-Phase Output and Input Wiring

L1

2

1

Limit Control

Contacts

(if required)

L1 for all
voltages

Alarm or Current Transformer Output
Alarm or Current Transformer Output

(Model Number-Dependent)

Heater

4 to 20mA input:

(+)

(-)

4.5 to 32VÎ (dc) input:

(+)

(-)

Phase-to-neutral
100VÅ (ac) and above
The neutral must not be switched.

Phase-to-phase
200VÅ (ac)
and above

3
4
5
6

5
6

Current Sensing Option
DD10 - _ _ _ _ - 1 _ _ _

Current Monitor

or Indication

On-board

Current

Transformer

Semiconductor
Fuses

Non-latching Alarm Option

DD10- _ _ _ _ - S _ _ _

5
6

On-Board

Triac

Alarm

Indicator

1A

3
4

3
4

L2

Heater

Neutral

Ground lug supplied. Use
Thomas & Betts crimp tool
options below or equivalent.
Use 6 AWG copper conductor.
TBM 20S
TBM 25S
TBM 5
TBM 6
TBM 8
TBM 60RS

VÅ (ac) input

з
У

2

У

3

У

4

Shorted SCR Alarm

The Watlow DIN-A-MITE alarm option provides an alarm output for shorted SCR conditions. A shorted SCR alarm is detected
when there is no command signal and a load current is detected. The alarm output is then energized. This is a non-latching
alarm.

Torque Procedure

1. While connecting the line and load wires, ensure that all wire strands are inside the connector. Do not allow loose wire

strands to hang out of the connector. Once you have installed the wire, torque these same connections to 9.0 to 10.1 Nm
(80 to 90 in-lb). Use a dial or digital-type torque wrench and hold the torque at 9.0 to 10.1 Nm (80 to 90 in-lb) for 30 seconds.
The 30-second hold allows the wire to settle, minimizing the wire cold flow.

2. Re-torque the same connections after 48 hours.

3. Develop a maintenance program to re-torque all load and line connections every three to six months.

NOTE: L1 and L2 terminals are 3/16-inch Allen head screws.