P/N 133487
9
Banner Engineering Corp.
•
Minneapolis, U .S .A .
www .bannerengineering .com • Tel: 763 .544 .3164
SC22-3 Safety Controller
Instruction Manual
Overview
1.5.3 Status Outputs
The Safety Controller has 10 configurable status outputs, used to
send non-safety status signals to programmable logic controllers
(PLCs) or to human machine interfaces (HMIs), or they may be
used to power indicator lights . These outputs can be configured
to report on the status of input devices, safety outputs, or the
Controller itself . See Section 3 .7 for more information .
Signal Convention. The status output signal convention can be
configured to be 24V dc or 0V dc to indicate when:
• An input is in the Run state
• A safety output is in the ON state (see Note 1)
• The system is in a Lockout condition
• An I/O fault is present (see Note 2)
• A system reset is needed
• A safety output needs a reset (see Note 3)
• A safety input is muted
NOTES:
1 . Only safety outputs that have inputs mapped to them can be
mapped to a status output .
2 . An I/O fault is a failure of one or more safety inputs or safety
outputs .
3 . Only safety outputs mapped to inputs configured with manual
reset logic can have a status output configured to indicate a
reset is needed .
WARNING . . .
Status Outputs
The Status outputs are not safety outputs and can
fail in either the ON or OFF state .
They must never
be used to control any safety critical applications. If a status
output is used to control a safety-critical application, a failure
to danger is possible and could lead to serious injury or death.
Monitored Mute Lamp Outputs
Status outputs O9 and O10 can be configured to create a
monitored mute lamp function for a mute operation . When the
mute lamp is ON, the Controller monitors for a short circuit in the
load . When the lamp is OFF, the Controller monitors for an open
circuit in the load . If an open circuit occurs before the start of
a mute cycle, the next mute cycle will be prevented . If an open
circuit occurs during a mute cycle, that mute cycle will finish, but
the next mute cycle will be prevented . If a short occurs before or
during a mute, that mute cycle will start and finish, but the next
mute cycle will be prevented . If not used to monitor a mute lamp,
these outputs may be used in the same ways as outputs O1–O8 .
IMPORTANT: Only terminals O9 and O10 have the extra
monitoring circuitry needed for a monitored mute lamp . If
monitoring of the mute lamp is not required (depending on
applicable standards), any of the status outputs (O1–O10) may
be used to indicate a mute condition .
NOTE: Because of this feature, these status outputs will always
appear ON with no load (see Specifications, Section 2 .2) .
1.5.4 I/O Mapping: the I/O Control Relationship
The term “map” implies a control logic relationship between
an input and an output or between an input and another input,
where the state of the first input determines the state of the
output or of the second input .
• Inputs Mapped to Outputs. The following devices can be
mapped directly to the safety outputs:
– Emergency stop buttons
– Safety gate switches
– Optical sensors
– Two-hand control devices
– Safety mats
– Protective stop switches
– Rope pulls
– Enabling devices
– External device monitoring
Safety Input Device 1
Safety Input Device 2
Safety Input Device 3
Safety Input Device 4
Safety
Output
1
Safety
Output
2
Safety
Output
3
Figure 3-1. Input and output mapping
• Inputs Mapped to Inputs. Muting sensors and bypass
switches work in conjunction with certain safety input devices
to temporarily suspend the Stop signal of a safety input device .
These sensors and switches are mapped directly to the safety
inputs; they are then indirectly mapped to the safety output(s)
that the muted safety inputs control (see Section 3 .5 .4) .