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SD66 

 

8

PARTS LIST 

Siemens Amplifying and Reducing Relay, Model Series 66 

Drawing 4297PL 

Rev 7/82

 

 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

All product designations may be trademarks or product names of Siemens Energy & Automation, Inc. or other supplier companies 
whose use by third parties for their own purposes could violate the rights of the owners.

 

 
Siemens Energy & Automation, Inc. assumes no liability for errors or omissions in this document or for the application and use of information in 
this document.  The information herein is subject to change without notice. 
 
Procedures in this document have been reviewed for compliance with applicable approval agency requirements and are considered sound 
practice. Neither Siemens Energy & Automation, Inc. nor these agencies are responsible for repairs made by the user. 

IMPORTANT 

Service Parts Kits are available for 
servicing the instrument. Contact 
Siemens for available kits; refer to the 
Product Support section of this 
instruction. Some parts in this Parts 
List may not be available for separate 
purchase. 
 
* Recommended on-hand spare parts. 
Always specify range, serial number, 
or other nameplate information when 
ordering spare parts. 

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Summary of Contents for 66 Series

Page 1: ...eration Maintenance Warranty and Parts List Model Designation 66 BA 2 Model Series Material and Function A Brass Amplifying R Brass Reducing Input to Output Ratio 2 1 2 Model 66BA2 2 1 Model 66BR2 4 1 4 Model 66BA4 4 1 Model 66BR4 3 1 3 Model 66BA3 3 1 Model 66BR3 6 1 6 Model 66BA6 6 1 Model 66BR6 Specifications Supply Pressure Normal 20 psig Minimum 1 psig above maximum required output Maximum 80...

Page 2: ...may cause damage to the relay Pressures in excess of those stated in the Specifications section may cause damage to the relay Instrument Air Requirements Connect the instrument i e relay to a source of clean dry oil free instrument air Failure to do so will increase the possibility of a malfunction or a deviation from specified performance CAUTION Use of process fluids other than instrument air is...

Page 3: ...ive areas of the input diaphragm and output diaphragm assembly The input diaphragm of an Amplifying Relay has a larger effective area than the output diaphragm assembly which requires the output to be proportionally higher for the relay to be in balance see Figure 2 Amplifying View Conversely the input diaphragm of a Reducing Relay has a smaller effective area than the output diaphragm assembly wh...

Page 4: ... port Supply port is clogged due to build up on the plunger and or supply port Refer to Maintenance Cleaning and clean plunger and supply port Output pressure will not increase or increases with an increase in input pressure Supply pressure is too low Raise supply pressure Ruptured input diaphragm or output diaphragm assembly Refer to Maintenance to replace input diaphragm or output diaphragm asse...

Page 5: ...d plunger spring 7 Insert a 1 16 Allen wrench through the exhaust port in the bottom forging make adjustment 8 Install plunger plunger spring and retaining nut 9 Repeat steps 4 through 8 until span is set Function and Ratio Change The function and or ratio of a Relay can be changed using standard parts To change the function from amplifying to reducing or vice versa with the same ratio e g Model 6...

Page 6: ...formation is provided on the product nameplate part number or model number serial number and or version For most software this information is given in the Help About screen If there is a problem with product operation Is the problem intermittent or repeatable What symptoms have been observed What steps configuration changes loop modifications etc were performed before the problem occurred What sta...

Page 7: ...t the goods do not conform to the above warranty Repaired and replacement parts shall be warranted for the remainder of the original period of notification set forth above but in no event less than 12 months from repair or replacement At its expense Buyer shall remove and ship to Seller any such nonconforming items and shall reinstall the repaired or replaced parts Buyer shall grant Seller access ...

Page 8: ...is subject to change without notice Procedures in this document have been reviewed for compliance with applicable approval agency requirements and are considered sound practice Neither Siemens Energy Automation Inc nor these agencies are responsible for repairs made by the user IMPORTANT Service Parts Kits are available for servicing the instrument Contact Siemens for available kits refer to the P...

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