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KEYENCE GL-RHG Series User Manual

Page 58

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3-2

Safety Distances

3-10

GL-RHG-M-NO3-E

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Example 6 When using GL-RHG as safety device for press machine in China

Safety distance calculation according to GB4584: 2007

For a press machine of which the slide can stop at any position

Equation

S = K × T + C

S

: Safety distance (mm)

K

: Speed when a body or part of body approaches the danger zone (mm/s.)

When the light curtain is installed horizontally, use 1600 mm/s.
When the light curtain is installed vertically, use 2000 mm/s if the safety distance does
not exceed 500 mm and use 1600 mm/s if exceeds 500 mm.

T

: Response time of the whole press machine control system (s) (T = t1 + t2)

t1

: GL-RHG Maximum response time

" Response time (OSSD)" page 7-5

t2

: Maximum time required by the machine to stop after receiving a signal from the safety

device (GL-RHG), (s)

C

: Additional distance (mm)

If the press machine control system does not prevent the unintended start-up and/or the
unintended restart of the machine (Interlock function of the machine is not applied), C fol-
lows the table below.

If the interlock function of the machine is applied, C = 0 can be set.

Detection capability (mm)

Additional distance C (mm)

more than 20, less than 30

130