6 safety mats – Banner SC22-3E Safety Controller with Ethernet User Manual
Page 103
Dual-Channel (PNP device): This circuit is a Type IIIa Two-Hand
Control circuit as described by ISO 13851, and typically can meet
ISO 13849-1 (EN 954-1) category 1 requirements. The Safety
Controller does not provide short circuit detection between chan-
nels in this configuration.
OFF
OFF
2x Complementary (4 or 5 terminals): These circuits show is a
Type IIIc Two-Hand Control circuit as described by ISO 13851,
and typically can meet ISO 13849-1 (EN 954-1) Category 4 re-
quirements. In the actuated condition (e.g., S1 open/S2 closed) a
short across the closed contact can cause the response time to in-
crease based on the debounce time. In this situation, the response
time could be longer as specified, based on the (selected) de-
bounce time, see section
4.3.2 Safety Input Device Properties
page 28.
Select this option if using Banner Self-checking Touch Button mod-
els STBVR81…
24V
S1
S2
S3
S4
2x Complementary (PNP device): This image shows a Type IIIc
Two-Hand Control circuit as described by ISO 13851, and typically
can meet ISO 13849-1 (EN 954-1) Category 4 requirements. In the
actuated condition (e.g., S1 open/S2 closed as shown), a short
across the closed contact can cause the response time to in-
crease, based on the debounce time. In this situation, the re-
sponse time could be longer than specified, based on the (selec-
ted) debounce time, see section
4.3.2 Safety Input Device Proper-
on page 28.
Select this option if using Banner Self-checking Touch Buttons
models STBVP6…
ON
OFF
ON
OFF
S1
S2
S3
S4
10.6 Safety Mats
The Safety Controller may be used to monitor pressure-sensitive safety mats and safety edges (sensors).
The purpose of the safety mat input of the Safety Controller is to verify the proper operation of 4-wire presence-sensing safety mats
(sensors). Multiple mats may be switched in series to one Controller; 150 ohms maximum per input (see section
on page 104). The Controller is not designed to monitor 2-wire mats, bumpers, or edges (with or without sensing
resistors).
The function is to monitor the contacts (contact plates) and the wiring of one or more safety mat(s) for failures and prevent the machine
from restarting if a failure is detected. A reset routine after the operator steps off the safety mat can be provided by the Safety Controller,
or, if the Controller is used in auto-reset mode, the reset/restart function must be provided by the machine control system. This prevents
the controlled machinery from restarting automatically after the mat is cleared.
WARNING: . . . Application of Safety Mats
Requirements vary widely for the level of control reliability or category as described by ISO 13849-1 (EN 954-1) in the appli-
cation of safety mats. While Banner Engineering always recommends the highest level of safety in any application, it is the
responsibility of the user to safely install, operate, and maintain each safety system per the manufacturer's recom-
mendations and comply with all relevant laws and regulations.
SC22-3/-3E Safety Controller Instruction Manual
P/N 133487 rev. C
www.bannerengineering.com - tel: 763-544-3164
103