![Banner SC26-2 Series Скачать руководство пользователя страница 90](http://html1.mh-extra.com/html/banner/sc26-2-series/sc26-2-series_instruction-manual_471846090.webp)
Whenever possible, incorporating External Device Monitoring (EDM) and/or Adjustable Valve Monitoring (AVM) is highly
recommended to monitor devices under control (FSDs and MPCEs) for unsafe failures. See
on page 90 for more information.
Output Connections—when used, Final Switching Devices (FSDs) typically accomplish this when the safety outputs go to
the Off state. The Safety Relay Outputs must be connected to the machine control such that the machine's safety related
control system interrupts the circuit or power to the machine primary control element(s) (MPCE), resulting in a non-
hazardous condition.
The Safety Relay Outputs can be used as the Final Switching Device (FSD) and can be interfaced in either a Dual-Channel
or Single-Channel safety (protective) stop circuit (see
on page 92). Refer to
on page 11 before making connections and interfacing the Safety Controller to the machine.
The level of the safety circuit integrity must be determined by risk assessment; this level is dependent on the
configuration, proper installation of external circuitry, and the type and installation of the devices under control (FSDs and
MPCEs). The safety relay outputs are suitable for Category 4 PL e / SIL 3. See
on page 88 for hookup examples.
Important: The user is responsible for supplying overcurrent protection for all relay outputs.
6.6.3 EDM and FSD Hookup
External Device Monitoring (EDM)
The Controller’s safety outputs can control external relays, contactors, or other devices that have a set of normally closed
(N.C.), force-guided (mechanically linked) contacts that can be used for monitoring the state of the machine power
contacts. The monitoring contacts are normally closed (N.C.) when the device is turned Off. This capability allows the
Controller to detect if the devices under load are responding to the safety output, or if the N.O. contacts are possibly
welded closed or stuck On.
The EDM function provides a method to monitor these types of faults and to ensure the functional integrity of a dual-
channel system, including the MPCEs and the FSDs.
A single EDM input can be mapped to one or multiple Safety Outputs. This is accomplished by opening the Safety Output
Properties window and checking EDM, then adding External Device Monitoring from the Safety Input tab in the Add
Equipment window (accessed from the Equipment view or Functional View), and connecting the External Device
Monitoring input to the EDM node of the Safety Output.
The EDM inputs can be configured as one-channel or two-channel monitoring. One-channel EDM inputs are used when the
OSSD outputs directly control the de-energizing of the MPCEs or external devices.
•
One-Channel Monitoring—a series connection of closed monitor contacts that are forced-guided (mechanically
linked) from each device controlled by the Controller. The monitor contacts must be closed before the Controller
outputs can be reset (either manual or automatic). After a reset is executed and the safety outputs turn On, the
status of the monitor contacts are no longer monitored and may change state. However, the monitor contacts must
be closed within 250 milliseconds of the safety outputs changing from On to Off.
•
Two-Channel Monitoring—an independent connection of closed monitor contacts that are forced-guided
(mechanically linked) from each device controlled by the Controller. Both EDM inputs must be closed before the
Controller can be reset and the OSSDs can turn On. While the OSSDs are On, the inputs may change state (either
both open, or both closed). A lockout occurs if the inputs remain in opposite states for more than 250 milliseconds.
•
No Monitoring (default)—If no monitoring is desired, do not enable the Safety Output EDM node. If the
Controller does not use the EDM function in Category 3 or Category 4 applications, the user must make sure that
any single failure or accumulation of failures of the external devices does not result in a hazardous condition and
that a successive machine cycle is prevented.
CAUTION: EDM Configuration
If the application does not require the EDM function, it is the user’s responsibility to ensure that this
does not create a hazardous situation.
CAUTION: External Device Monitoring Hookup
It is strongly recommended that at least one normally closed, forced-guided monitoring
contact of each MPCE or external device is wired to monitor the state of the MPCEs (as shown
in the hookup figures). If this is done, proper operation of the MPCEs will be verified. MPCE
monitoring contacts must be used to maintain control reliability.
XS/SC26-2 Safety Controller
90
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 ...