Banner SC22-3E Safety Controller with Ethernet - Manual (Page 44)

• Properly installing multi-conductor cabling and multiple wires that pass through strain-relief fittings. Over-tightening of a strain-relief
can cause short circuits at that point.
• Using positive-opening or direct-drive components installed and mounted in a positive mode.
WARNING: . . . Use of Transient Suppressors
Transient suppressors are recommended. They MUST be installed across the coils of the FSDs. NEVER install sup-
pressors directly across the contacts of the FSDs. It is possible for suppressors to fail as a short circuit. If installed
directly across the contacts of the FSDs, a short-circuited suppressor will create an unsafe condition.
WARNING: . . . OSSD Interfacing
To ensure proper operation, the Safety Controller output parameters and machine input parameters must be consid-
ered when interfacing the solid-state Safety Outputs to the machine inputs. Machine control circuitry must be designed
so that:
• The maximum cable resistance value between the Safety Controller solid-state Safety Outputs and the machine inputs is
not exceeded,
• The Safety Controller’s solid-state Safety Output maximum Off state voltage does not result in an ON condition, and
• The Safety Controller’s solid-state Safety Output maximum leakage current, due to the loss of 0V, will not result in an ON
condition.
Failure to properly interface the Safety Outputs to the guarded machine could result in serious bodily injury or
death.
WARNING: . . . Shock Hazard and Hazardous Energy
Always disconnect power from the safety system (e.g., device, module, interfacing, etc.) and the machine being con-
trolled before making any connections or replacing any component.
Electrical installation and wiring must be made by Qualified Personnel and must comply with the relevant electrical standards
and wiring codes, such as the NEC (National Electrical Code), ANSI NFPA79, or IEC 60204-1, and all applicable local stand-
ards and codes.
Lockout/tagout procedures may be required. Refer to OSHA 29CFR1910.147, ANSI Z244-1, or the appropriate standard
for controlling hazardous energy.
WARNING: . . . Proper Wiring
The generalized wiring configurations shown are provided only to illustrate the importance of proper installation.
The proper wiring of the Safety Controller to any particular machine is solely the responsibility of the installer and
end user.
SC22-3/-3E Safety Controller Instruction Manual
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