Banner SC22-3E Safety Controller with Ethernet - Manual (Page 27)

The user has the sole responsibility to ensure that this Safety Controller is installed and interfaced to the guarded machine by
Qualified Persons (see Glossary), in accordance with this manual and applicable safety regulations.
4.2 Installing the Safety Controller
The Safety Controller mounts to a standard 35 mm DIN-rail track. It must be installed inside an enclosure rated NEMA 3 (IEC IP54) or
better. It can be mounted in any orientation. The user must comply with all instructions contained within product manuals and relevant
regulations.
For reliable operation, the user must ensure that the operating specifications are not exceeded. The enclosure must provide adequate
heat dissipation, so that the air closely surrounding the Controller does not exceed its maximum operating temperature. Methods to re-
duce heat build-up include venting, forced air flow (e.g., exhaust fans), adequate enclosure exterior surface area, and spacing between
the Safety Controller and other sources of heat. (See
Specifications, “Operating Conditions” on page 24.)
Mount the Safety Controller in a convenient location that is free from heavy impulse force and high-amplitude vibration.
Electrostatic Discharge (ESD) can cause damage to electronic equipment. To prevent this, follow proper ESD handling practices such as:
• Wear an approved wrist strap or other approved grounding products.
• Touch a grounded object before handling the Controller.
See ANSI/ESD S20.20 for further information about managing ESD.
4.3 Safety Input Devices
Safety input devices allow for the cessation of motion, or an otherwise hazardous situation, by controlling the Safety Outputs of the Safety
Controller. A Safety Output in the OFF state results in a stop of motion and removal of power from the machine actuators (assuming this
does not create additional hazards).
For a Safety Output to turn ON, all of its controlling safety input devices must be in their Run state. A few special safety input device
functions can, under predefined circumstances, temporarily suspend the safety input “stop signal” to keep the Safety Output ON (e.g.,
muting and bypassing).
The Safety Controller input configurations, depending on the type, have means to detect failures and faults that would otherwise result in
a loss of that control of the safety function. Once such a failure or fault is detected, the Safety Controller will lock out until the problem is
fixed.
Other input configurations do not have this detection capability. It is recommended that in all circumstances the installation of the Safety
Controller and its associated safety and safeguarding devices be installed to eliminate or minimize the possibility of failures and faults
that could result in the loss of the safety function(s).
Methods to eliminate or minimize the possibility of these failures include, but are not limited to:
• Physically separating interconnecting control wires from each other and from secondary sources of power.
• Routing interconnecting control wires in separate conduit, runs, or channels.
• Locating all elements (modules, switches, and devices under control) within one control panel, adjacent to each other, and directly
connected with short wires.
• Properly installing multi-conductor cabling and multiple wires through strain-relief fittings. (Over-tightening of a strain-relief can cause
short circuits at that point.)
• Using positive-opening or direct-opening components, as described by IEC 60947-5-1 that are installed and mounted in a positive
mode.
• Periodically checking the functional integrity / safety function and training the the operators, maintenance personnel, and others with
the operation of the machine and the safeguarding, and to recognize and immediately correct all failures.
Follow the device manufacturer's installation, operation, and maintenance instructions and all relevant regulations. If there
is any question about the device(s) that are connected to the Safety Controller, contact a Banner Application Engineer for
assistance.
SC22-3/-3E Safety Controller Instruction Manual
P/N 133487 rev. C www.bannerengineering.com - tel: 763-544-3164 27