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WATLOW TLM-8 User’s Guide 1

Watlow Controls

1241 Bundy Blvd., Winona, MN 55987

Customer Service

Phone: 1-800-414-4299

Fax: 1-800-445-8992

Technical Support

Phone: (507) 494-5656

Fax: (507) 452-4507

E-mail: [email protected]

Part No. 0600-2150-2000 Rev. D

Revised: October 2007

rights reserved.

TLM-8

User’s Guide

The TLM-8 is a multi-zone temperature limit switch.

For thermal system safety, the TLM-8 can satisfy the

requirement for independent temperature monitoring.

The TLM-8’s alarm outputs interface with visual and

audible alarm devices, or they can initiate safe shut-

down of equipment.

The TLM-8 has the following features:

• Multi-channel temperature monitoring

• Latching alarms

• Isolated sensor inputs

• Support for various thermocouples, RTDs, and

thermostats

• Diagnostic test mode

• Open-sensor fail-safe

• Compact and easy to install

• LED indicator lights

Up to eight temperature zones may be monitored. If

any temperature exceeds a trip point, the TLM-8 gen-

erates an alarm output. The alarm output may be used

for safety shutdown or annunciation. Alarm outputs

remain active until two conditions are met in sequence:

the temperature drops below the trip point and alarms

are acknowledged. Built-in indicator lights show power

and alarm states.

The TLM-8 accepts up to eight thermocouple, RTD or

thermostatic switch temperature sensors. There are

two global alarm relay outputs. The TLM-8 is also

available with eight channel-alarm relays in addition

to the two global relay outputs. If all temperatures are

below the trip point, the TLM-8’s relay outputs are

closed. When alarms activate, the relay contacts open.

Features and Description

Relays that open on alarm are consistent with fail safe

designs and practices. Alarms are acknowledged with

an optically isolated, digital input. Another isolated

digital input is used for testing, by simulating alarms

on all channels.

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TLM-8 System Diagram

Warranty

The TLM-8 is manufactured by ISO 9001-registered

processes and is backed by a three-year warranty to

the first purchaser for use, providing that the units

have not been misapplied. Since Watlow has no control

over their use, and sometimes misuse, we cannot guar-

antee against failure. Watlow’s obligations hereunder,

at Watlow’s option, are limited to replacement, repair,

or refund of purchase price, and parts which upon

examination prove to be defective within the warranty

period specified. This warranty does not apply to dam-

age resulting from transportation, alteration, misuse or

abuse. The purchaser must use Watlow parts to main-

tain all listed ratings.

1 2 3 4 5 6 7 8

Sommario

Pagina 1 - User’s Guide

WATLOW TLM-8 User’s Guide 1Watlow Controls1241 Bundy Blvd., Winona, MN 55987Customer ServicePhone: 1-800-414-4299Fax: 1-800-445-8992Technical Suppo

Pagina 2 - Wiring Recommendations

2 WATLOW TLM-8 User’s GuideMounting the TLM-8The TLM-8 mounts directly to a panel or on a DIN rail depending on the mounting style ordered.DIN Rail

Pagina 3 - TB2 Global Relay Outputs

WATLOW TLM-8 User’s Guide 3Acknowledge InputThe acknowledge input, ACK is an edge-triggered digi-tal input. The input accepts a 5 to 30VÎ (dc) sign

Pagina 4 - Maintenance

4 WATLOW TLM-8 User’s GuideUsing the TLM-8Sensor TypesSensor types for the TLM-8 are factory configured; the type of sensor for your TLM-8 is marke

Pagina 5 - Application Example

WATLOW TLM-8 User’s Guide 5Application ExampleIn the following example, a TLM-8 monitors tempera-tures and provides independent safety shutdown, al

Pagina 6 - Specifications

6 WATLOW TLM-8 User’s GuideSpecificationsAnalog InputsSensor input channels: 8Sensor Types and Trip Point Ranges:• 2-Wire 100 Ω Platinum RTD DIN cu

Pagina 7 - TLM-8 Part Numbers

WATLOW TLM-8 User’s Guide 7TLM-8 Part NumbersUse the tables to determine the characteristics of your TLM-8 based on its part number.Standard TLM-8

Pagina 8 - How to Reach Us

How to Reach Us Corporate Headquarters Watlow Electric Manufacturing Company 12001 Lackland Road St. Louis, MO 63146 Sales: 1-800-WATLOW2 Manufacturin

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