Lockout/tagout, 2 bypass switch hookup options – Banner SC22-3E Safety Controller with Ethernet User Manual
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Safe work procedures provide a means for individuals to control exposure to hazards through the use of written procedures for specific
tasks and the associated hazards. Such procedures also provide base documentation for a training program. Once again, personnel
must be trained in the use of the safeguard and the use of the bypass.
Lockout/Tagout
In machine maintenance and servicing situations in which the unexpected energization, start up, or release of stored energy could cause
injury, OSHA 29CFR1910.147 “The control of hazardous energy (lockout/tagout)” or ANSI 2244.1 “Lockout/Tagout of Energy Sources”
must be adhered to. The user must refer to these standards to ensure that bypassing a safeguarding device does not conflict with the
requirements that are contained within that standard.
WARNING: . . . Limit Use of Bypass Function
The Bypass function is not intended for production purposes; it is to be used only for temporary or intermittent
actions, such as to clear the defined area of a safety light screen if material becomes "stuck". When Bypass is used, it
is the user's responsibility to install and use it according to relevant standards (such as ANSI NFPA79 or IEC/EN60204-1). It
must not be possible for the operator or other non-qualified persons to relocate them.
10.10.2 Bypass Switch Hookup Options
The device(s) is shown not actuated (OFF) state.
Dual-Channel (2 or 3 terminals): This circuit typically can meet
ISO 13849-1 Category 2 or Category 3 requirements, depending
on the safety rating and installation of the device(s). Dual Channel
3-terminal hookup uses pulse monitoring and can detect a short
circuit to another source of power. Both 2- and 3-terminal hookup
can detect a short between channels when the contacts are open
longer than 2 seconds.
24V
Dual-Channel (PNP device): This circuit can meet ISO 13849-1
Category 2, 3, or 4 requirements depending on the safety rating,
installation, and the fault detection (e.g., short circuit) capabilities
of the device. The Safety Controller does not provide short circuit
detection in this configuration.
OFF
OFF
Dual-Channel (4 terminals): This circuit can meet ISO 13849-1
Category 2, 3, or 4 requirements, depending on the safety rating
and the installation of the device. This circuit can detect a short cir-
cuit between channels or to another source of power.
Complementary (2 or 3 terminals): This circuit can meet ISO
13849-1 category 2, 3, or 4 requirements depending on the safety
rating and the installation of the device. This circuit can detect a
short circuit between channels. In the actuated condition (e.g., S1
open/S2 closed below), a short across the closed contact can
cause the response time to increase based on the debounce time.
In this situation, the response time could be longer than specified,
based on the (selected) debounce time, see section
24V
S1
S2
SC22-3/-3E Safety Controller Instruction Manual
P/N 133487 rev. C
www.bannerengineering.com - tel: 763-544-3164
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