Specifications

Visit our website: www.ab.com/catalogs
Publication S117-CA001A-EN-P
Presence Sensing Safety Devices
POC Type 4 Safety Light Curtains
2-33
GuardShield Micro 400
GeneralPrinciples
2-Opto-electronics
Safety SwitchesOperator
Interface
LogicPower
R
Description
Cascadable System
IMPORTANT
The standard GuardShield Micro 400
must always be the last segment in a
cascaded Micro 400 system.
IMPORTANT
The maximum cascaded Micro 400
system length can not exceed 10 m as
measured between the RJ45 connection
at the MSR42 controller to the last beam
in the standard Micro 400, including all
cable lengths. The maximum number of
beams in a cascaded Micro 400 system
can not exceed 255 beams.
Features
 Very small profile 15 x 20 mm (0.59 x 0.79 in.)
 M12 connector on 20 inch pigtails
 Minimal dead space of optic heads
Applications
 Light assembly machines/equipment
 Semi-conductor
 Micro-electronics
 Pharmaceutical
A GuardShield Cascadable Micro 400 safety light curtain system is
comprised of one or two pair of Cascadable Micro 400 light curtains
as well as a standard Micro 400 pair as the last segment pair in the
cascaded system.
GuardShield Micro 400 cascaded pairs are offered in both 14 mm
and 30 mm resolutions in limited protected heights which are listed
in the table below. It is possible to mix 14 mm and 30 mm resolution
pairs in a cascaded Micro 400 system.
The GuardShield Micro 400 is an economical three-box (transmitter,
receiver and controller) Type 4 safety light curtain offered in a small
profile (15 x 20 mm (0.59 x 0.79 in.)) housing. Designed for use in
benign industrial environments (IP54), this light-duty safety light
curtain system is targeted to the semi-conductor, micro electronic
and small assembly machine markets.
Protective heights are offered from 150…1200 mm (5.91…47.2 in.)
in 150 mm (5.91 in.) increments. The compact housing size allows
the GuardShield Micro 400 to be mounted in areas where standard
safety light curtains may not be able to be mounted due to space
constraints. It is also possible to recess the GuardShield Micro 400
transmitter and receiver into machine frames.
The Micro 400 requires a dedicated controller. The MSR41 controller
is used for on/off application and the MSR42 can also be used as a
multi-function safety module, allowing the connection of additional
safety light curtains, safety laser scanner, or any safety device with
two Output Signal Switch Devices (OSSD) outputs, or two contacts,
such as E-stops and enabling switches.
There are a number of operating modes that can be configured with
the MSR42 controller. EDM, START/Restart interlock, fixed and
floating blanking and muting are possible.
The Micro 400 transmitter and receiver are offered with 8-pin M12
connectors at the end of 500 mm (19.8 in.) integrated cables. The
patchcords to connect the transmitter and receiver to the controller
are the same and are offered in 3, 5, and 8 m (9.8, 16.4, and 26.2 ft)
lengths. These patchcords are configured on one end with M12
connectors (which mate to the integrated pigtail connectors) and
RJ45 connectors on the opposite end (which plug into the MSR42
controller).
The GuardShield Micro 400 is also offered in a cascadable
configuration. GuardShield Cascadable Micro 400 safety light
curtains allow the interconnection of multiple segments of the Micro
400 safety light curtain with a common pair of safety outputs. This
cascadable configurability of the GuardShield Micro 400 reduces
overall system wiring and allows the GuardShield Micro 400 to be
fitted into a variety of applications where the safety distances for
mounting the light curtain may allow personnel to stand between
the sensing field of the light curtain and the hazard or where
multiple sided guarding is required and the use of corner mirrors is
not possible.
The cascadable Micro 400 safety light curtains are ordered as pairs
(transmitter and receiver) and are shipped under one cat. no. After
selecting the appropriate light curtain cat. nos. for a cascaded Micro
400 system, select the standard Micro 400 pair as the last segment
in the cascaded system and also select interconnecting patchcords.
A cascadable pair of GuardShield Micro 400 light curtains has a
500 mm (19.8 in.) pigtail with a female M12 QD on the bottom of the
Micro 400 light curtain and a 500 mm (19.8 in.) pigtail with a male
M12 QD attached to the top of the Micro 400 transmitter and
receiver.
The GuardShield Cascadable Micro 400 system operates as a single
light curtain pair with a common set of OSSDs. Each segment pair
is connected in series making the response time of the complete
system the sum of each segment pair, plus the response time of the
MSR41 or MSR42 and other safety devices in the stop circuit.
When connecting two cascadable segments together, the resultant
cable length between segments is 1000 mm (39.6 in.).
If an additional length between segment pairs is required, Rockwell
Automation offers an M12-to-M12 patchcord in 1 m (39.37 in.) and
3 m (118.1 in.) lengths (Cat. Nos. 445L-AC8PC1 or 445L-AC8PC3).