Banner ES-FA-6G Safety Module - Manual (Page 6)

Electrical Installation
It is not possible to give exact wiring instructions for a device such as an E-stop Safety
Module which interfaces to a multitude of machine control configurations. The
following guidelines are general in nature.
The ES-FA-6G has no delay function. Its output relay contacts open within 35 milliseconds
after the E-stop switch contact opens. This classifies this E-stop Safety Module as a
functional “Category 0” E-stop control as defined by NFPA 79 (National Fire Protection
Association Standard for Industrial Machinery) and EN418 (European Standard: “Safety of
Machinery, Emergency Stop Equipment, Functional Aspects – Principles of Design”).
Connection of E-Stop Switch
Connect the poles of the E-stop switches as shown in Figure 2. The switches in Figure
2 are shown in the “armed” position with both contacts closed. Multiple E-stop
switches connected to one E-stop Safety Module must be series connected (see Figure
3 and the warning, on page 7).
Connection to the Machine to be Controlled
The hookup diagram (Figure 2) shows a generic connection of the E-stop Safety
Module’s three redundant output circuits to Master Stop Control Elements MSC1 through
MSC3. 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 (reference ANSI B11.19, section 5.2: “Stop Control”). This
stopping action is accomplished by removing power to the actuator coil of either Master
Stop Control Element.
To satisfy the requirements of Safety Category 2 of prEN 954-1, the Master Stop Control
Elements must offer a normally closed, forced-guided monitor contact. One normally
closed monitor contact from each Master Stop Control Element is wired in series to the
Y1-Y2 feedback/reset input (see Figure 2). In operation, if one of the switching contacts
of either master stop control element fails in the shorted condition, the associated
monitor contact will remain open. Therefore, it will not be possible to reset the E-stop
Safety Module.
E-Stop Safety Module
– Model ES-FA-6G
page 6
A1 +24V ac/dc
Figure 3. Series connection of multiple
E-stop switches