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9M02-8978-A002-EN
Version 14
Safe-E-
Stop™
User Guide
BUTTON
PRESSED
STATUS LED COMM
LOSS
LED
LOW
BATT
LED
ERRO
R LED
HAPTIC
FEEDBACK
DISPLAY
Low battery
level
Red Flashing
Orange
flashing
3 short pulses
every 10 sec.
PSD #
ACTIVE
ERROR
Red
The Status LED generally has the following meaning:
Table 10: PSD Status LED General Meaning
GREEN
Normal operation
ORANGE
Items of note
RED
Action is required to correct a problem
The Haptic feedback (vibration) generally has the following meaning:
Table 11: Haptic Feedback General Meaning
ONE PULSE
Confirmation
THREE PULSES
Warning of an abnormal event
6.4 Normal Operation
Once linked to an MSD, normal operation can commence.
For normal operation, all linked PSDs must have their E-Stop switches released, good battery capacity,
and be within a good RF range (typically within 300 feet of the machine but distance will vary by
environment).
6.4.1 Communication Loss
Moving a PSD out of RF range results in an E-Stop; this is a safety critical feature to ensure that the E-
Stop of a linked PSD is always available. As this is not ideal, the PSD warns the user if the signal is
getting too low by flashing the status LED Red (requiring action by the user), changing the COMM LOSS
LED to Orange, displaying REDUCE RANGE on the display, and Haptic vibration in groups of 3 pulses.
The user must move closer to the machine or risk causing an E-Stop by COMM LOSS.
If a PSD moves out of range and causes a COMM LOSS, both the E-Stop and COMM LOSS safety
relays on the MSD open.
6.4.2 Communication Loss Recovery Stage 1
The PSD causing the COMM LOSS has 30 seconds to move back into RF range, after which the user
can press the ‘|’ button on the PSD to recover the MSD operation. The machine will still need to be reset.
6.4.3 Communication Loss Recovery Stage 2
If the offending PSD is not moved back into range within 30 seconds, a full COMM LOSS is enforced. All
PSDs unlink and an MSD reset will be required by pressing a button that is wired to the MSD COMM
LOSS reset switch safety inputs. Afterwards, all PSDs will need to relink to rejoin the operation, and the
machine will need reset.
This process makes it possible to recover from a PSD that has for instance been accidentally removed
from site without de-linking.