AT-GM-11KM BANNER ENGINEERING, AT-GM-11KM Datasheet - Page 9

• Manufacturer Part Number: AT-GM-11KM
• Description: AT-GM-11KM TWO-HAND CTL W/MUTI
• Manufacturer: BANNER ENGINEERING

DUO-TOUCH
from the DUO-TOUCH SG Safety Module
and the machine being controlled before
making any wire connections.
Electrical installation of hand controls, the
DUO-TOUCH SG Safety Module, and the
interconnection to the machine control
must be made by qualified personnel and
must comply with NEC (National Electrical
Code), ANSI/NFPA79 or IEC60204-1, and
all applicable local standards.
buttons, capacitive touch buttons and
similar devices. When electronic hand con-
trols are used as input switches for a
DUO-TOUCH SG Safety Module, the hand
controls and the Safety Module must be
powered from the same voltage source.
Failure to do so creates a potentially dan-
gerous condition, which could result in
serious injury or death.
If power is applied to the Safety Module
before power is applied to the electronic
hand controls, an output from the DUO-
TOUCH SG Safety Module could result and
may trigger machine motion. Also,
electronic hand controls cannot guarantee
the state of their outputs at the time power
is applied to them.
!
Banner Engineering Corp.
www.bannerengineering.com • Tel: [phone]
WARNING ...
Electronic Hand Controls
Electronic (powered) hand con-
trols include optical touch
CAUTION ...
Power Before Wiring
Always disconnect all power
®
SG –
Disconnect
Use of
•
Minneapolis, MN U.S.A.
Models AT-GM-11KM and AT-HM-11KM Two-Hand Control Modules
Connection of Power to the DUO-TOUCH SG Safety Module
The Safety Module requires a 24V dc, 115V ac or 230V ac supply voltage (see
Specifications on page 15). Use extreme caution whenever installing ac power. Use a
minimum of 16 to 18 AWG wire for power and output connections. A hand-operated
supply disconnect (e.g. a circuit breaker) must be provided (per NFPA79 and
IEC/EN60204).
Connection to the Machine to be Controlled
Figure 6d shows a generic connection of the Safety Module’s two redundant output
contacts to machine primary control elements MPCE1 and MPCE2. An MPCE is defined
as an electrically-powered element, external to the safety module, which directly
controls the machine’s normal operating motion so that it is the last (in time) to operate
when motion is either initiated or arrested. Some older machines offer only one MPCE;
for such machines, it may be necessary to add a second MPCE to establish the
appropriate level of safety integrity (e.g., control reliability).
The connection of the safety outputs must be in such a manner that the stop command
issued by the AT-GM-11KM can not be overridden by a device or circuit that is not at
the same level of safety integrity. This means that the safety outputs are interfaced on
the output of the machine logic (e.g., PLC or PC). Then, normally, a feedback signal
identifies to the machine logic the status of the safety module and, if possible, the
status of the MPCEs. If interposing relays are used, they must be of mechanically linked
(forced-guided) design and monitored by the MPCE Monitoring Circuit (Y1/Y2).
As a summary, Control Reliability (OSHA 29CFR1910.217, ANSI B11, and ANSI/RIA
R15.06) and Category 3 and 4 (ISO13849-1) requirements demand that a single failure
does not lead to the loss of the safety function, or does not prevent a normal or
immediate stop from occurring. The failure or the fault must be detected at or before
the next demand of safety (e.g., at the beginning or end of a cycle, or when a safeguard
is actuated). The safety-related function of the machine control then must issue an
immediate stop command or prevent the next machine cycle or hazardous situation
until the failure or fault is corrected. The user must refer to the relevant standard(s)
for complete information.
As shown in Figure 8d, a normally-closed, mechanically linked monitor contact from
each of the two MPCEs must be connected in series across terminals Y1 and Y2. This
allows the Safety Module to monitor the state of the MPCEs, and to prevent a
successive machine cycle, if an MPCE fault is detected. Monitoring MPCE contacts is
one method of maintaining control reliability. When MPCE monitor contacts are not
available, a jumper wire must be installed across terminals Y1 and Y2.
When a jumper wire is used (dotted line between Y1 and Y2 in Figure 8d), it is the
user’s responsibility to provide an appropriate level of safety for the means of machine
interfacing to ensure that any single MPCE component failure will not result in the loss
of safety.
When switching inductive ac loads, it is good practice to protect the Safety Module
outputs by installing appropriately-sized arc suppressors. However, if arc suppressors
are used, they must be installed across the load being switched (e. g., across the coils
of external safety relays), and never across the Safety Module’s output contacts (see
WARNING on page 10).
P/N 109782
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