P/N 133487 67
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
SC22-3 Safety Controller
Instruction Manual
Troubleshooting and Maintenance
8. Troubleshooting and Maintenance
8.1 Cleaning
If cleaning of the polycarbonate enclosure and display is
required, wipe it down with a soft cloth that has been dampened
with a mild detergent and warm water solution. Disconnect
power to the Controller and wring out excessive moisture
from the cloth before cleaning.
8.2 Repairs and Warranty Service
The Controller is designed and tested to be highly resistant
to a wide variety of electrical noise sources that are found in
industrial settings. However, intense electrical noise sources that
produce EMI or RFI beyond these limits may cause a random
trip or lockout condition. If random trips or lockouts occur, check
that:
• The supply voltage is within 24V dc +/- 20%.
• The Safety Controller’s plug-on terminal blocks are fully
inserted.
• Wire connections to each individual terminal are secure.
• No high-voltage or high-frequency noise sources or any
high-voltage power lines are not routed near the Controller
or alongside wires that are connected to the Controller.
• Proper transient suppression is applied across the output
loads.
The SC22-3 Safety Controller has no internal field-replaceable
parts. If the Controller is not operating properly please contact
the factory. In case of a non-recoverable fault, do not open
the housing of the Controller and do not attempt to repair
the Controller yourself. Contact a Banner factory applications
engineer at:
Banner Engineering Corp.
9714 Tenth Avenue North
Minneapolis, MN 55441
Phone: 763 544 3164
Toll Free (US only): 888 373 6767
Email:
sensors@bannerengineering.com
An applications engineer will attempt to troubleshoot the
Controller from your description of the problem. If he or she
concludes that the Controller or a component is defective, they
will issue an RMA (Return Merchandise Authorization) number
for your paperwork, and give you the proper shipping address.
Package the Controller carefully; damage which occurs during
return shipping is not covered by warranty.
8.3 Troubleshooting — Finding and Fixing Faults
Depending on the configuration, the Safety Controller is able to
detect a number of input, output and system faults, including:
• A stuck contact
• An open contact
• A short betweeen channels
• A short to ground
• A short to a voltage source
• A short to another input
• A loose or open connection
• An exceeded operational time limit
• A power drop
When a fault is detected, a message describing the fault
is displayed in the fault diagnostics menu. An additional
message may also be displayed to help remedy the fault. The
troubleshooting table in Section 8.3.1 summarizes the faults and
suggests additional checks to find the cause of the problem. The
following sections describe how to recover from a lockout and
how to access fault information, using either the PCI or the OBI.
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