MSR300 Safety System Manual
Rockwell Automation
MSR300 Manual.doc
Pg 12 of 85
3.1.2 MSR300 Safety Relay Functions
MSR300 Systems can be used for various safety relay functions outlined below, when
appropriately configured for the respective function.
Simultaneity monitoring (sometimes referred to as synchronization monitoring or
coincidence gating) is often necessary for many of these safety applications. This means
that 2 (sometimes even 3) input contacts must be closed (or reset) simultaneously to
clear this set of inputs (simultaneity between all channels of
one
input). For these
applications, the allowable time window is 3 seconds. Another common application that
involves simultaneity monitoring (0.5 seconds window) is two-hand safety control.
(simultaneity activation of
both
inputs of one module).
3.1.2.1
One-Channel Emergency Stop
•
Safety output contacts are opened if the input loop is open.
•
Stop category: 0.
•
Short-circuiting of the input loop to electrical ground or 24V will be detected.
3.1.2.2 Two-Channel
Emergency
Stop
•
Safety output contacts are opened if at least one input loop is open.
•
Stop category: 0.
•
Short-circuiting of the input loop to electrical ground or 24V will be detected.
•
Cross loops will be detected.
•
Suitable for use with safety mats.
•
Can be configured for simultaneity detection: 3 seconds limit.
3.1.2.3
Three-Channel Emergency Stop
•
Safety output contacts are opened if at least one input loop is open.
•
Stop category: 0.
•
Short-circuiting of the input loop to electrical ground or 24V will be detected.
•
Cross loops will be detected.
•
Can be configured for simultaneity detection: 3 seconds limit.
3.1.2.4
Two-Channel Safety Gates
•
Safety output contacts are opened if the N/O input is closed or the N/C input is
open
•
Stop category: 0.
•
Short-circuiting of the input loop to electrical ground or 24V will be detected.
•
Cross loops will be detected.
•
Can be configured for simultaneity detection: 3 seconds limit.
•
Can be configured to execute a start-up test of the input loops.
3.1.2.5 Two-Channel
Light
Curtain
•
Safety output contacts are opened if one or more inputs have has no signal.
•
Stop category: 0.