When a guard is closed, the actuator is moved towards the sensor. The sensor detects
the code of the actuator when it reaches the switch-on distance. If the sensor detects a
taught-in code (valid actuator), the evaluation unit sets the corresponding application
diagnostic output OUT to HIGH.
If valid actuator has been detected for all connected sensors, the system sets the
safety outputs (relay output) to HIGH.
When a guard is opened, the actuator is moved out of the sensor’s response range. The
system sets the safety outputs and the application diagnostic output OUT
01 … 04 assigned to the sensor to LOW.
Additional actuators can be taught in for the connected sensors (e.g. after replacement
of an actuator). Only the most recently taught-in actuator is valid.
3.2
Product characteristics
3.2.1
Product variants
The safety switch is delivered in different variants. You will find an overview of impor‐
tant distinguishing features of the variants in the following.
Sensor
•
Sensor with plug connector M8, 3-pin (with latching and screw connection)
•
Sensor with permanently connected cable and flying leads (5, 10 or 15 m)
Evaluation unit
•
T4000-1RCA02: for connection of up to two sensors
•
T4000-1RCA04: for connection of up to four sensors.
Complete overview of all variants:
see "Ordering information", page 42
3.2.2
Sensing face
The sensor has a sensing face,
see "Dimensional drawings", page 40
.
3.2.3
Fault detection
Any faults that occur, including internal device faults, are detected at the latest with the
next request to close the safe contacts (e.g. at the machine start). The safety switch
then switches to safe state. If a fault is detected, the safety circuit is switched off, the
diagnostic output DIA is set to HIGH and the LED DIA lights up red.
The evaluation unit enters safe status for every detectable fault due to dynamic interro‐
gation of the actuators and the redundant, diverse configuration of the safety electron‐
ics in combination with two safety outputs. The status of the safety outputs is moni‐
tored internally by positively guided N/C contacts (relay output).
3.2.4
Status indicators
The LEDs STATE (green), OUT (yellow ) and DIA (red) indicate the operational status of
the safety switch on the evaluation unit.
Overview of the LED statuses and their meanings:
.
3.2.5
Reset
The T4000 Multi transponder safety switch has a reset function. The function can be
taught in during commissioning.
PRODUCT DESCRIPTION
3
8022726/2019-05-07 | SICK
O P E R A T I N G I N S T R U C T I O N S | T4000 Multi
11
Subject to change without notice
