Murphy TATTLETALE 518PH, TATTLETALE 518E, TATTLETALE 518APH User Manual

Specifications

Case: Polycarbonate
Contact Rating: 10 A
Coil Circuit Resistance: 339 ohms ± 10% 12 Volt

678 ohms ± 10% 24 Volt

Minimum Latch Voltage: 12 Volt model: 10 VDC

24 Volt model: 20 VDC

Minimum Latch Current: 12 Volt model: 30 mA

24 Volt model: 30 mA

Operating Temperature Range: -40 to 176°F (-40 to 80°C)

Installation and Operation of the
518PH, 518APH & 518E TATTLETALE

®

00-02-0187

Revised 10-06

Section 25

BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

✔✔

Disconnect all electrical power to the machine.

✔✔

Make sure the machine cannot operate during installation.

✔✔

Follow all safety warnings of the machine manufacturer.

✔✔

Read and follow all installation instructions.

Please read the following information before installing. A visual inspection of this product for damage during shipping is
recommended before mounting. It is your responsibility to have a qualified person install this unit.

GENERAL INFORMATION

2-5/16 in.

(59 mm)

2-5/8 in.

(67 mm)

2-15/32 in.

(63 mm)

Applies to 518APH model.

9/16 in.

(14 mm)

13/16 in.
(21 mm)

Panel

Lockwasher

Hex
Nut

Instruction
Plate

TATTLETALE

®

25/64 in.

(10 mm) dia

1/4 in.

(6 mm) dia

Mounting Holes

Installation

Dimensions and Installation

“Loop Circuit” Wire Length in Miles @ 77°F (25°C)

Resistance in Ohms

Maximum recommended Loop Circuit resistance
for proper operation of TATTLETALE®.

CAUTION: Certain dangers to human safety and to equipment may occur if some equipment is stopped without pre-warning. It is recommended
that monitored functions be limited to alarm only or to alarm before shutdown.

00-02-0187 page 1 of 2

WARNING

00-02-0187 page 2 of 2

Push button will not remain in the depressed position after
engine startup (wired according to Figure 2).

• Be sure oil pressure is adequate to raise pointer past SWICHGAGE

®

contact. (Not necessary if oil pressure SWICHGAGE®is equipped with
push button lockout.)

• Visually check wiring for loose connections, frayed wiring, etc. on all
terminals and within switch loop circuit.

• Check 14 amp fuse connected to “B” terminal.

• Check for good ground on “G” terminal.

• Disconnect switch loop circuit from “SW1” and “SW2” terminals. Place
a temporary jumper between SW1 and SW2 and restart engine. If the
push button stays in with engine running, the 518PH, 518APH & 518E is
not the problem. This indicates either an open circuit, unwanted ground,
or too high resistance in switch loop circuit wiring between “SW1” and
“SW2”.

• Verify continuity by performing the following:

1. Disconnect switch loop circuit from “SW1” and “SW2” terminals.

2. Remove power from “B” terminal.

3. Use an ohmmeter to check for “good continuity” (25 ohms or less)

through switch loop circuit. If good continuity is indicated, proceed
to Step 4.

4. Adjust SWICHGAGE®contact away from pointer. Check continuity

between one end of loop circuit, “SW1 or “SW2” and ground. Good
continuity (25 ohms or less) indicates an unwanted ground in loop cir­cuit such as a terminal rotating against the mounting panel. Remove
ground, restore loop circuit connections to “SW1” and “SW2”.

5. Reconnect power to “B” terminal and restart engine.

6. Using an ohmmeter, check resistance between one end of the loop

circuit to the other. Resistance should not exceed 25 ohms. If resis­tance is too high, check for loose connections in loop circuit.
Otherwise select larger size wire for loop circuit.

Engine fails to shutdown when contacts close on one-wire to
ground SWICHGAGE

®

controls (wired according to Figure 1).

With engine running, jumper “SW1” to “G” terminal. If switch trips and
engine shuts down, trouble could be SWICHGAGE®contacts not making
contact, lack of good case ground on SWICHGAGE®, or broken/cut wire.

Lack of case ground on SWICHGAGE®.

Verify that mounting bracket on the SWICHGAGE®has broken through
the panel paint and has made good contact with bare metal. If good con­tact has not been made, tighten mounting stud nuts accordingly.

Failure of contacts on SWICHGAGE®to make contact.

Adjust contacts back and forth against the pointer to give a wiping and
cleaning action on contacts. If this does not correct the problem, replace
SWICHGAGE®.

TROUBLESHOOTING

TYPICAL WIRING DIAGRAMS

Figure 1 shows a jumper installed between “SW1 and “SW2”.
SWICHGAGE®instruments are normally open. This is not a
Closed Loop™ circuit.

Figure 2 shows a Closed Loop™ circuit with normally open Murphy
SWICHGAGE®instruments and Normally Closed switches (alignment
and “V” belt switches, etc.).

Figure 2

Figure 1

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

CONTROL SYSTEMS & SERVICES DIVISION

P.O. Box 1819
Rosenberg, Texas 77471 USA
Phone: [phone] Fax: [phone]
E-mail: [e-mail]
Web site: www.fwmurphy.com

FRANK W. MURPHY, LTD

Church Rd Laverstock
Salisbury SP1 1QZ UK
Phone: [phone] Fax: [phone]
E-mail: [e-mail]
Web site: www.fwmurphy.co.uk

COMPUTRONIC CONTROLS, LTD

41 - 43 Railway Terrace Nechells
Birmingham B7 5NG UK
Phone: [phone] Fax: [phone]
E-mail: [e-mail]
Web site: www.computroniccontrols.com

FW MURPHY INSTRUMENTS (HANGZHOU) CO. LTD

77 23rd Street
Hangzhou Economic & Technological Development Area
Hangzhou, Zhejiang, 310018, China
Phone: [phone] Fax: [phone]

FW MURPHY

P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1.918.317.4100 Fax: [phone]
E-mail: [e-mail]

INDUSTRIAL PANEL DIVISION

Fax: [phone]
E-mail: [e-mail]

MURPHY POWER IGNITION

Web site: www.murphy-pi.com

www.fwmurphy.com

Printed in U.S.A.

518PH / 518APH / 518E

*

®

Instruments

Ammeter

Ignition
Switch

Battery

To Shutdown

Solenoid Operator

“De-energized”

To Shutdown

Fuel Valve

G NORNC

SW1 SW2

“Energized”

To Shutdown

Solenoid Operator

“De-energized”

To Shutdown

Fuel Valve

or
Solenoid
Operator

In-Line Fuse should be removed on “energized” to shutdown configurations.

*

Applies to 518APH model.

**

*

“De-energized”

To Shutdown

Ignition Coil

**

B

In-Line Fuse

Normally Open

SWICHGAGE

14 Amp

518PH / 518APH / 518E

*

®

Instruments

Ammeter

Normally

Closed

Switches

Ignition
Switch

Battery

G NORNC

SW1 SW2

“Energized”

**

*

“De-energized”

To Shutdown

Ignition Coil

B

14 Amp

In-Line Fuse

Normally Open

SWICHGAGE

* In-Line Fuse should be removed on “energized” to shutdown configurations.

Applies to 518APH model.

**