Hyd-Mech PH 211, Use And Maintenance Manual

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3--7 13 Safety and accident prevention
Emergency devices
In accordance with Standard CEI 204---1:
H
Chapter 5 Section 6 Sub--section 1 “Emergency stop device” : «the emergency
stop device immediately stops all the dangerous and other functions of the ma-
chine»;
H
Chapter 6 Section 2 Sub--section 4 Point 7 “Protective guards”: «the removal
of protective guards designed to prevent access to dangerous parts or zones causes
the machine to stop immediately; replacing the guards does not restart the func-
tions, which must be reset».
...Emergency devices applicable to the PH211:
1. Emergency stop : a non---return mushroom---head pushbutton, colour red on
yellow background, is located on the control panel of the machine. To release
the pushbutton, the actuator must be rotated 45 ˚ . After the emergency situ-
ation has been resolved, the machine must be reset.
2. Automatic thermal---magnetic cutout switch with thermal---magnetic relay:
the machine auto switch, located on the control panel, has two protection sys-
tems against voltage drops. In the case of a voltage drop, all electrical compo-
nents are disengaged, the machine stops immediately, and automatic restart
when the power supply returns is inhibited. Another function is that of reset-
ting the thermal relay provided to protect against overcurrents.
3. Pressure contact for monitoring blade tension: the machine stops immedi-
ately if the blade breaks or if the tensioner cylinder pressure drops.
4. Protective guard for blade: a coded key microswitch is operated if the blade
cover is accidentally or intentionally opened during the machine operating
cycle, immediately shutting down all functions.
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