ROJ PCS 200, Original Instructions Manual

Page: 40 / 112

Installation
- 2.20 - PCS 200 Kit
2.9.5 Safety switch
The connection to a safety switch offers two main functions:
-
Safety function: if the contact is open, the MD cannot rotate.
-
Addressing function: during the MD addressing stage, the safety contact closes
and confirms the device address (see paragraph 3.4.2 on section 3).
The safety switch must be implemented using:
-
An electromechanical switch with
“
positive opening
”
NC contact (this condition
is shown by the symbol )
or
-
a high-reliability electromagnetic sensor (e.g. SICK RE11-SA03 or equivalent)
☞
In order to grant the required safety level (Performance Level = c – see paragraph
1.4.7), you should foresee a safety switch having the following characteristics:
•
B10d >= 2 x 10e
6
(see note below)
☞
The safety switch is not supplied with the kit as it must be chosen according to the
dimensions requirements of the machine it will be installed on.
Note: B10d is the reliability parameter declared by the device manufacturer,
corresponding to the number of switchings which can be granted without errors.