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9M02-8978-A002-EN
Version 14
Safe-E-
Stop™
User Guide
AMBER
SOLID
Low temperature condition. Battery temperature is <0°C (below freezing)
and cannot be charged. Charger will monitor battery temperature for two
hours and begin charging once it rises above 0°C. Remove battery from
charger if not charging after two hours.
AMBER
ONE FLASH
Under charged condition. Battery remains under charged after the charger
completes a full charging cycle. A single flash pattern is also provided when if
the battery temperature remains <0°C (below freezing) after monitoring for two
hours.
8.
MSD
8.1 MSD Overview
The MSD provides the physical link into the
machine’s hard-wired E-Stop system. Its E-Stop Safety
Relays are wired in series with this circuit.
The PSDs are dynamically linked to the MSD on an as-needed basis.
A controlled process must be in place to ensure that PSD users verify that they have linked to the MSD
when joining and when leaving have unlinked from the MSD.
Remember that the PSD has distinct and clear operator feedback to show if it is UNLINKED or LINKED.
Provided the user is correctly trained and aware, there should be a very low likelihood that an operator
has failed to Link and yet still thinks that they are linked. Additional confirmation may be obtained by
having a PLC monitor the Ethernet port data and turn on a lamp or buzzer by the machine when any PSD
green button is pressed, this can be used as a final confirmation that the PSD is on and linked to that
machine.
NOTE 1
: The MSD does not need a PSD to be connected in order to keep its E-Stop Safety Relays
closed; as long as power is connected to the MSD and it has no faults, these relays are held
closed and the hard-wired E-Stop circuit is maintained; only the COMM LOSS relays will be
open without a PSD connected.
NOTE 2
: The COMM LOSS relays are an automatic function and have a safety rating of SIL3. The
COMM LOSS relays are a positive indication that at least one PSD is linked and that none of
those PSDs are in a state of COMM LOSS.
NOTE 3
: The E-Stop relays are triggered by human action (the PSD E-Stop switch) and so are not an
automatic function; however, from the point of being triggered (E-Stop switch pressed by the
user) the system has a SIL3 performance level.
NOTE 4
: "If the machine will at times be used without any of the Safe-E-Stop PSDs in use the MSD
COMM LOSS relays will be open; therefore the COMM LOSS relays cannot be wired in series
with the E-Stop relays because the hard-wired machine E-Stop circuit will never be closed;
therefore, if the COMM LOSS relays are required they would either a) need an override switch,
b) not be used or c) used to alter operating mode by a PLC."
NOTE 5
: When one or more PSDs are linked the E-Stop and COMM LOSS relays require good
communications to stay in their closed state; a COMM LOSS will be triggered by any PSD
leaving the operating range or RF interference corrupting or blocking the RF signal.
8.2 MSD Connections
The MSD features multiple interface ports for various connections:
▪
COMM LOSS reset switch connects to inputs 1 and 3 (polarity reversible)
