Watlow Series 101 Manual do Utilizador descarregar pdf (Página 3)

Watlow Series 101 User’s Manual ■ 3

• Use the correct thermocouple type matching the model

number on the unit sticker. See the underside of the

unit.

• Use the proper thermocouple polarity. Red is negative.

• Insulate the thermocouple mounting from the mounting

surface to prevent heat migration input errors.

• Thermocouple leads should be twisted pair wire and

routed separately from any other lines.

• In electrically noisy environments (heavy switching of

contactor, motors, solenoids, etc.) use shielded thermo-

couple lead wire with the shield connected at the sensor

end only.

• All wiring and fusing must conform to the National

Electric Code (NEC) NFPA70 and any other locally

applicable codes.

• Fuse the independent load voltage on the L1 (hot) side

and connect it to the common (COM) side of the relay.

120VÅ 101 _ - 1 _ _ _ - 0000

230VÅ 101 _ - 2 _ _ _ - 0000

24VÅ 101 _ - 3 _ _ _ - 0000

NOTE: The line voltage is specified by your model number.

Figure 3a — Power wiring.

WARNING: To avoid potential electric shock, use National

Electrical Code safety practices when wiring and connecting this

unit to a power source and to electrical sensors or peripheral

devices.

All wiring and fusing must conform to the National Electric Code

and to any locally applicable codes.

WARNING: Applying incorrect voltage may result in irreversible

damage to the control.

NOTE: We strongly recommend that all control loops use an

approved temperature limit control for over or under temperature

limit protection. Failure to install temperature limit control pro-

tection where a potential hazard exists could result in damage to

equipment and property and injury to personnel.

Figure 3b — Thermocouple wiring.

NOTE: When an external device with a non-isolated circuit com-

mon is connected to the dc output, you must use an isolated or

ungrounded thermocouple.

Electromechanical Relay, Form C with suppression 3A

101A - _ _ _ _ - 0000

Solid State Relay, Form A, 0.5A without suppression

101B - _ _ _ _ - 0000

Figure 3c — Mechanical and solid-state relay wiring.

Switched DC

10 1C - _ _ _ _ - 0000

Figure 3d — Switched dc wiring.

dc+

dc-

External

Device

dc-

dc+

18V

(dc)+

dc-

Internal Circuitry

Fuse

External

Device

Output Wiring

Input Wiring

Fuse

Power Wiring

Wiring Guidelines

1 2 3 4 5 6

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