3 optical sensor generic hookup – Banner SC22-3E Safety Controller with Ethernet User Manual
Page 99
WARNING: . . . Incomplete Information
Many installation considerations necessary to properly applying these devices are not covered by this document. Refer to
the appropriate device installation instructions to ensure the safe application of the device.
Optical safety devices also must be placed at an appropriate safety distance (separation distance), according to applicable standards.
Because these devices vary, it is not practical to list specific calculations here. Refer to the applicable standards and to manufacturer
documentation specific to your device for the appropriate calculations; for the purpose of the calculation, Safety Controller default re-
sponse is 0.010 seconds, plus any additional closed-to-open debounce time. If the debounce time is adjusted, the time in excess of 6 ms
(default closed-to-open debounce time) must be added to the stated response; refer to
on page 23. Also see sections
on page 64, Configuration Summary and the OBI flowchart (see
Figure 45. OBI Configuration mode options
on page 63) for
instructions on gaining quick access to a specific Controller’s response time.
If the application includes a pass-through hazard (a person could pass through the optical device beams and stand undetected on the
hazard side), other safeguarding may be required, and manual reset should be selected; see section
on page
33.
10.4.3 Optical Sensor Generic Hookup
All figures show the optical sensor actuated, in the Normally Open (OFF) state.
Single-Channel (1 terminal, 2 terminals or PNP device): These
circuits can typically meet ISO 13849-1 Category 2 requirements,
depending on the safety rating of the device(s). At a minimum, a
safety-rated device must be used to achieve a Category 2. The 1-
terminal and the PNP device circuits can not detect a short circuit
to another source of power. Two-terminal hookup uses pulse moni-
toring and can detect a short circuit to another source of power.
Fault Exclusion must be used to achieve a higher level of safety
circuit integrity.
24V
OFF
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
24V
S1
S2
SC22-3/-3E Safety Controller Instruction Manual
P/N 133487 rev. C
www.bannerengineering.com - tel: 763-544-3164
99