Those who build machines need safety, for export
also. Moeller offers competent consultation when you
need to engineer a safe machine.
Performing risk analysis with the Moeller safety
manual is no problem. As soon as the machine control
assumes safety tasks, the resistance of the control
to malfunctions is defined conform to EN 954-1
“Safety-related parts of control systems”. Different
categories assist you in extending the control
system and provide suitable resistance to
malfunctions. Evaluation criteria include the
seriousness of a possible injury, the length of time
and frequency of which endangered persons are in the
endangered area, as well as the possibility to avoid
danger.
Moeller offers safety relays of the ESR4 series
for example, so that your Emergency-Stop button,
safety doors or two hand controls are safely
detected and evaluated and perform their respective
actions.
All ESR4 relays feature a width of just 22.5 mm.
In addition to all approvals of the German
employer's liability insurance association and CE
marking, these devices are also approved as devices
for world markets and include UL and CSA approval.
Signalling, no
problem
The opto-isolated input B1 allows actuation of the
ETR 4 timing relay from any point in the circuit. This
saves one actuating contact and the additional signal
wiring. It is possible to actuate the signal input even
via voltages other than the control voltage.
For example, the ETR4 may be supplied at 230 V 50 Hz,
while signal input actuation is via 24 V DC.
Remote time
setting
A remote potentiometer can be connected to connection
Z1/Z2 on the ETR 4-70/DILET70. The time can be
externally set with the remote potentiometer.
If timing relays are installed in the enclosure or in
control panels, the time setting can be undertaken when
the door is closed.
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ESR4
safety relay – Safety guaranteed
Remote time
setting