Safety Inputs
Latch Reset Input
Cancel Delay Input
SO1
On
Off
Off Delay
Time Limit
Figure 63. Keep Output On function for Safety Inputs with the Latch
Reset
Off Delay
Started
Off Delay
Ended
Off Delay
Normal End
Cancel Delay
Performed
Safety Inputs
Cancel Delay Input
SO1
Off Delay
On
Off
Figure 64. Keep Output On function for Safety Inputs without the
Latch Reset
6.6 Safety Outputs
The Base Controller has two pairs of Solid-State Safety Outputs (terminals SO1a and b, and SO2a and b). These outputs
provide up to 500 mA each at 24 V dc. Each redundant Solid-State Safety Output can be configured to function individually
or in pairs, for example, split SO1a independent of SO1b, or SO1 as a dual-channel output.
Additional Safety Outputs can be added to expandable models of the Base Controller by incorporating I/O modules. These
additional safety outputs can be isolated relay outputs that can be used to control/switch a wide range of power
on page 11).
WARNING: Safety Outputs must be connected to the machine control so that the machine’s safety-
related control system interrupts the circuit to the machine primary control element(s), resulting in a
non-hazardous condition.
Do not wire an intermediate device(s), such as a PLC, PES, or PC, that can fail in such a manner that
there is the loss of the safety stop command, or that the safety function can be suspended, overridden,
or defeated, unless accomplished with the same or greater degree of safety.
The following list describes additional nodes and attributes that can be configured from the Safety Output function block
Properties window (see
Adding Inputs and Status Outputs
on page 19):
EDM (External Device Monitoring)
Enables the safety controller to monitor devices under control (FSDs and MPCEs) for proper response to the
stopping command of the safety outputs. It is strongly recommended to incorporate EDM (or AVM) in the
machine design and the safety controller configuration to ensure the proper level of safety circuit integrity (see
AVM (Adjustable Valve Monitoring)
Enables the safety controller to monitor valves or other devices that may become slow, "sticky", or fail in an
energized state or position and whose operation needs to be verified after a Stop signal occurs. Up to three AVM
inputs can be selected if EDM is not used. It is strongly recommended to incorporate AVM (or EDM) in the
machine design and the safety controller configuration to ensure the proper level of safety circuit integrity (see
Adjustable Valve Monitoring (AVM) Function
LR (Latch Reset)
Keeps the SO or RO output Off until the input changes to the Run state and a manual reset operation is performed
See
Manual Reset Input and Latch Reset Block
on page 30 for more information.
RE (Reset Enable)
This option appears only if LR (Latch Reset) is enabled. The Latch Reset can be controlled by selecting Reset
Enable to restrict when the Safety Output can be reset to a Run condition.
FR (Fault Reset)
Provides a manual reset function when input faults occur. The FR node needs to be connected toa Manual Reset
button or signal. This function is used to keep the SO or RO output Off until the Input device fault is cleared, the
faulted device is in the Run state , and a manual reset operation is performed. This replaces power down/up cycle
Manual Reset Input and Latch Reset Block
on page 30 for more information.
XS/SC26-2 Safety Controller
84
Содержание SC26-2 Series
Страница 1: ...XS SC26 2 Safety Controller Instruction Manual Original Instructions 174868 Rev E 20 June 2014 174868 ...
Страница 58: ...Figure 49 Run Time Equipment view Figure 50 Run Time Functional View XS SC26 2 Safety Controller 58 ...
Страница 62: ...Figure 54 Sample Configuration Functional View XS SC26 2 Safety Controller 62 ...