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DRAFT - 26 March 2015

DRAFT - 26 March 2015

SM45-55-SAD Rev 3

11

10

7.2 

Appendix B: Proof Test Procedure, MTL45/5500 Digital Output Modules

Example MTLx521 Proof Test Procedure

Solenoid driver module Proof Test Procedure:

1.  System - Normal operation test
2.  Input /Output characteristic functional safety test
3.  System - Normal operation test

1.   System - Normal operation test

Make sure that the module to be tested is operating normally in the target system, without errors and in energised 
mode. If the module is connected in a faulty or de-energised loop, restore normal fault free and energised 
conditions before testing.

2.   Input/Output characteristic functional safety test

Observe normal anti-static precautions when handling equipment during device testing.

Remove the unit from the target system and connect as shown in Figure 1.  Please note, that it is acceptable to 
leave the unit in the target system, when it is secured, that the terminals are disconnected from the system and 
available for test. Alternatively, for the backplane mounted MTL4521 modules, use a separate backplane for this 
purpose to facilitate access to the power and output connections. 

a) Loop powered modules: MTL4521, 4521L, 5521, 5522, 4523L, 5525

Figure 1

 Basic test arrangement - loop powered 

Connect a voltmeter between the + & - output terminals of the module, observing polarity. 

Apply 24V dc between the input drive terminals. 

The voltmeter on the output terminals should indicate a value between 22.2 and 24 volts. 

Switch off the power to the module. 

Connect an ammeter between the + and – output terminals of the module, observing polarity. 

Apply 24V dc between the input drive terminals. 

The ammeter should indicate a value of at least 48mA and a maximum of 60mA (76mA for MTL5522)

 
Operate the test sequence and confirm expected operation of the module. 
It is recommended that the results are recorded in a table such as that shown on page 11.

+

Vs+

Vs–

i/p

o/p

V

A

Summary of Contents for Crouse-hinds series

Page 1: ...NT These products are for use as elements within a Safety System conforming to the requirements of IEC61508 2010 or IEC61511 1 2016 and enable a Safety Integrity Level of up to SIL3 to be achieved for...

Page 2: ...4 4 Assessment of functional safety 5 4 1 Hardware safety integrity 5 4 2 Systematic safety integrity 7 4 3 SIL capability 7 4 4 EMC 7 4 5 Environmental 7 5 Installation 8 6 Maintenance 8 7 Appendice...

Page 3: ...his manual These modules are members of the MTL4500 and MTL5500 range of products 1 2 Variant Description Functionally the MTL4500 and MTL5500 range of modules are the same but differ in the following...

Page 4: ...be suitable for the process and have been assessed and verified for use in functional safety applications as well as its certification for hazardous area mounting 3 Selection of Product and Implicatio...

Page 5: ...s below 20 C are to be avoided to ensure required performance 4 Assessment of Functional Safety 4 1 Hardware Safety Integrity The hardware assessment shows that MTLx52x solenoid alarm drivers have a h...

Page 6: ...re modes shown above can then be defined as Failure mode Category Output stuck ON Dangerous undetected du Output stuck OFF no output Safe undetected su Output uncertain OK or OFF Safe undetected su Co...

Page 7: ...used in SIL 1 safety functions in a simplex architecture Note Independent of hardware architecture and systematic capability considerations the hardware probability of failure for the entire safety f...

Page 8: ...o include conformal coating 6 Maintenance To follow the guidelines pertaining to operation and maintenance of intrinsically safe equipment in a hazardous area yearly periodic audits of the installatio...

Page 9: ...on A IEC 61326 3 1 2008 Electrical equipment for measurement control and laboratory use EMC requirements Part 3 1 Immunity requirements for equipment performing or intended to perform safety related f...

Page 10: ...t in the target system when it is secured that the terminals are disconnected from the system and available for test Alternatively for the backplane mounted MTL4521 modules use a separate backplane fo...

Page 11: ...etween 22 2 and 24 volts 5 Switch off the power to the module 6 Connect an ammeter between the output terminals of the module observing polarity 7 Close the Control switch or apply the 24V source for...

Page 12: ...0V 2 3 Output voltage on state 21 4 to 24V 5 Output current off state 0mA 6 7 Output current on state 48mA and 76mA Separately Powered Modules Date ______ ______ __________ Supply voltage Vs ________...

Page 13: ...DRAFT 26 March 2015 SM45 55 SAD Rev 3 13 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Page 14: ...DRAFT 26 March 2015 SM45 55 SAD Rev 3 14 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Page 15: ...DRAFT 26 March 2015 SM45 55 SAD Rev 3 15 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Page 16: ...aton com INDIA MTL India No 36 Nehru Street Off Old Mahabalipuram Road Sholinganallur Chennai 600 119 India Tel 91 0 44 24501660 24501857 Fax 91 0 44 24501463 E mail mtlindiasales eaton com ITALY MTL...

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