External Device Monitoring (Edm) - Banner E-Stop ES-TN-14H5 Instruction Manual

E-Stop Safety Modules with Adjustable Delay –
Connection of Safety Switches
Models ES-TN-14H5 and ES-TN-14H6 may be used as a safety gate monitoring module.
To achieve Safety Category 4 operation per ISO 13849-1, two individually mounted,
positive-opening safety switches that operate concurrently when the gate or guard is
opened must be used (see Figure 4).
The ES-TN-14H5 and ES-TN-14H6 verify concurrent opening of two contacts – one from
each safety switch. Reset of the Safety Module is not possible if one switch fails to open,
or if a short circuit occurs between the safety switches or to dc common or to +24V.
Please contact the Banner Factory Applications Group at the numbers listed on the last
page to discuss your intended use.
Connection of Reset Switch (Manual Monitored Reset)
The Reset Circuit switch can be any mechanical switch, such as a normally open
momentary switch, or a two-position key switch. The Reset switch must be capable
of reliably switching 18-30V dc at 10-25 mA. As shown in Figure 2, the Reset switch
connects between terminals X1 and X2 of the Safety Module. A reset will occur after
the Reset button goes from open, to closed, and back to open state.
The Reset switch must be located outside of – and not be accessible from – the
area of dangerous motion, and must be positioned so that any area of dangerous
motion may be observed by the switch operator during the Reset procedure.

External Device Monitoring (EDM)

To satisfy the requirements of Safety Category 4 of ISO 13849-1, the Master Stop
Control (MSC) elements must each offer a normally closed, forced-guided monitor
contact. For 2-channel monitoring, one normally closed monitor contact from one
MSC element, controlled by one of the immediate output contacts from the Module,
is wired in series to one normally closed monitor contact from one MSC element,
controlled by one of the delayed output contacts from the Module, to input X3-X4. The
same configuration (one immediate N.C. series connected to one delayed N.C.) is wired
to X5-X6 (Figure 2). In operation, if one of the switching contacts of any MSC element
fails in the shorted condition, the associated monitor contact will remain open, making
reset of the Module impossible.
There is no specific feedback input to which the immediate MSCs must be connected.
However, two immediate contacts (from two MSCs) or two delayed contacts (from
two MSCs) should not be connected to the same input. If 1-Channel Monitoring
is selected, input X5-X6 must be jumpered, the Module configured for 1-Channel
Monitoring (see Figure 2) and all monitoring contacts must be wired in series to X3
and X4. See 1-Channel, 2-Channel, or No External Device Monitoring on page 10 for
more information.
Connection to the Guarded Machine
The hookup diagram (Figure 2) shows a generic connection of 4 of the E-Stop Safety
Module's eight redundant output circuits to Master Stop Control elements MSC1 through
MSC4. A Master Stop Control element is defined as an electrically powered device,
external to the E-Stop Safety Module, which stops the machinery being controlled by
immediately removing electrical power to the machine and (when necessary) by applying
braking to dangerous motion. This stopping action is accomplished by removing power
to the actuator coil of any Master Stop Control Element.
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Models ES-TN-14H5/-14H6
Safety Interlock
Switch #1
Safety Interlock
Switch #2
S11 S21
S22 S12
Figure 4. Hookup using contacts from
two safety switches
Safety
gate
or
guard