Rockwell Automation 440R MSR42 Control Module User Manual - Manual (Page 9)

7
MSR42 Control Module User Manual
Original instructions
Recommended surge suppressors are:
Table 6
Safety Components
The connected safety components (e.g. safety switches, position switch,
emergency stop buttons, cable pull safety switches) must satisfy the
relevant standards for application within safety areas:
• Emergency stop button : EN 418
• Safety switch : EN 60947-5-1
• Light curtains : EN 61496-1 / -2
• etc.
as well as the requirements of the safety analysis. It is essential that the
components contain 2 force guided, normally closed (NC) contacts
(Figure 8), and that they are approved for the relevant safety level or
category.
As a basic rule to increase reliability, it is recommended to use safety
components with integrated gold contacts. Safety components, can be
connected to “GPIO1” through “GPIO4” as shown below. The inputs
are short-circuit and cross fault monitored.
Figure 8: Connecting an emergency stop
In general the two circuits of dual channel safety components are cross-
fault monitored. A short of these two circuits would lead to an
emergency stop of the MSR42 control module. The two circuits are also
time monitored. This means, if one circuit changes e.g. of an emergency
stop, the second circuit has to follow within 5 seconds. If this is not the
case, the MSR42 interprets this as a fault and the controller switches off
the safety circuit.
Depending on the configuration and the application, there may be more
terminals than components needed. The unused ports may be bridged.
Shielded cables are recommended for bridging to reduce the input of
EMC.
Table 7
Safety Override
In Figure 9 a “Safety Override” key switch and a safety prevention lamp is
shown. With the “Safety Override” key switch it is possible to override
the safety function of the Micro400 light curtain. This means that if the
override key switch is activated, the safety outputs stay high even if e.g.
the protective field is interrupted.
Figure 9: Connecting a Safety Override key switch and the associated lamp
Depending on the risk evaluation when using a “Safety override” key
operated switch a corresponding indicator lamp must also be connected.
The connection for this safety override lamp can be configured to be
current controlled (see Technical Data chapter 14). This means, the
current (I) of the individual lamp must remain between (Imin < I <
Imax). If the monitored current is not within these limits, the light
curtain will not be overridden although the safety override key switch is
activated.
The safety override lamp used has to fulfil the requirements of EN 61496
and has to be mounted close to the protective field and be clearly visible
to the machine operator. Safety override only takes place when both
circuits are closed. Likewise safety override only takes place when both
circuits were opened before becoming closed. A cross-fault will be
1. In cases where the MSR42 control
module is installed without expander
modules the function external device
monitoring (EDM) or start release
must always be used, the only
exceptions are if the PNP outputs are
connected with another safety relay
or a safety PLC.
2. Through the use of start release or
EDM, it is possible to switch external
“power” contactors within the safety
circuit. Such contactors often deal
with large inductive loads, which
during the switching off phase can
create large potential peaks. For this
reason surge suppressors are highly
recommended. Surge suppressors
must be connected parallel to the
external contactors (e.g. Figure 4).
They may never be connected parallel
to the contacts of a MSR45E expander
module. Surge suppressors may
drastically increase the off delay time
of the contactors. Diodes are not
allowed to be used as surge
suppressors, for exactly this reason.
Supply voltage [V] Resistor R [
Ω]
Condenser C [μF]
24 100 2.2
115 - 230 220 0.2
Terminal LED green LED off
GPIO3 Contact GPIO1/GPIO3 closed Contact GPIO1/GPIO3 open
GPIO4 Contact GPIO2/GPIO4 closed Contact GPIO2/GPIO4 open