FORD EL4-1999 LIGHT CURTAINS AND PRESENCE-SENSING DEVICES FOR MACHINE SAFEGUARDING《机器保护用光幕和存在感知装置》.pdf

1、 Manufacturing StandardsFord Motor Company199902 LIGHT CURTAINS AND PRESENCE-SENSING DEVICES EL4FOR MACHINE SAFEGUARDINGEngineering Standards theword “should“ as a recommendation.2. REFERENCE STANDARDS: Whenever a specific standard is mentioned in thisStandard, it is understood it will be the latest

2、 revision thereof unlessotherwise specified.2.1 Ford Motor Company - Manufacturing Standards EX1, EL3X, and ELX.2.2 INDUSTRY STANDARDS:2.2.1 Code of Federal Regulations, Department of Labor, OccupationalSafety and Health Administration, 29 CFR 1910, (OSHA),particularly Sections:1910.211 (62) for Def

3、initions,1910.212 (a) (1) for machine guarding1910.212 (a) (3) for point of operation guarding1910.212 (a) (3) (ii) for General Requirements for AllMachines1910.217 (b) (13) for Control Reliability1910.217 (h) (6)(xvii) for controls with internally storedprograms1910.217 (h) (9) (iv) for Minimum Obj

4、ect Sensitivity1910.217 (h) (9) (v) for Safety Distance2.2.2 American National Standards Institute (ANSI) B.11.19“Safeguarding when Referenced by Other B11 Machine Tool SafetyStandards,“ particularly, but not limited to Sections:1.1, 1.2, 1.3.1 EC2, section 4;and ES2, item 7.5.3.3.4 IMMUNITY TO INTE

5、RFERENCE AND ENVIRONMENTAL CONDITIONS: Unitsshall not be affected by any of the following:(1) Radio Frequency Interference (RFI) - Units shall pass testin Ford Standard ES2, Section 6.(2) Electromagnetic Interference (EMI) - per NEMA ICS Standardslisted in section 2.2.4 above.(3) Weld Fields - Refer

6、 to Ford Standard ES2.(4) Power Line Noise Interference, Voltage Variations,Transients.(5) Electrostatic Discharge - in accordance with IECPublication 801-2 at 2kV, 4kV, 8kV, and 15kV levels.(6) Strobe, Fluorescent, Sunlight, or Ambient LightInterference.(7) Application and Removal of Power, Ford St

7、andard ES2,section 6.7.Manufacturing StandardsFord Motor Company199902 LIGHT CURTAINS AND PRESENCE-SENSING DEVICES EL4FOR MACHINE SAFEGUARDINGEngineering Standards (b) the identifier for each componentinvolved as shown on the 70Z*-drawing and mechanical drawings(e.g. :LCR1/LCR2, I:01/12SOL, Brake st

8、opping time); (c) theindividual Distance (in inches) associated with each component;and (d) the total “Safety Distance“ (Ds) which shall be the sumof the individual Distances(4) The Brand and model of the PSD unit shall be included in arectangle inside and at the bottom of the box.4.2.2 Blanking sha

9、ll not affect the safety distance.4.2.3 If the PSD unit does not have an indicating means to inform theoperator that the unit is blanked, the control system shall providelights to indicate blanking.5. APPLICATION EXAMPLES:5.1 If there are no application issues with the equipment being guardedby the

10、PSD that would prevent a complete shutdown when the PSD isinterrupted, then the “Enable Signal“ of Circuit 1 may be used inthe Emergency Stop circuit of the equipment. (See Figures 1 and 2.)Manufacturing StandardsFord Motor Company199902 LIGHT CURTAINS AND PRESENCE-SENSING DEVICES EL4FOR MACHINE SAF

11、EGUARDINGEngineering Standards (Reviewer(s) mustcheck and initial each item)Light curtain is on Corporate approved list (E1-ASL): Yes Initial(s)OSHA/ANSI “Minimum Safety Distance“ is satisfied: Yes Initial(s)Safety Distance Chart appears on the 70Z*-drawing: Yes Initial(s)“Control Reliability“ requi

12、rements are satisfied: Yes Initial(s)(see ANSI B11.19, 5.5 for definition)A MCC (Machine Control Contact) or MTS (Machine Test Switch) is installed and wired to thelight curtain per the manufacturers connection diagrams:Yes Initial(s)(this contact or switch opens once per cycle, only during the safe

13、 portion of the cycle)Any Deviations? (explain in detail and indicate whether acceptable; use back of form ifnecessary):Note: Refer to Ford Mfg. Standard EL4 for details.PSDI application is: Approved Not Approved Controls Engineer: _ Controls Engineering Supervisor:_ Plant Safety Engineer: _ Division Safety Engineer: _ Corporate Safety Engineer: _Date: _Notes:_