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Terminal Designation
S11
S12, S13
B2
11, 12, 14
Z1
Safety-Related Inputs
INSUFFICIENT AND/OR INEFFECTIVE SAFETY-RELATED FUNCTIONS
Only connect a sensor/device to a safety-related input that meets all requirements as per your
risk assessment and that complies with all regulations, standards, and process definitions
applicable to your machine/process.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
The device provides one safety-related input.The safety-related input consists of one control
output DC+ (terminal S11) and two input channels CH+ (terminals S12, S13).
Even though the safety-related input has two input channels for increased diagnostics, it is still a
single input for single-channel operation as per ISO 13849.
The input channels receive the input signal from the connected sensor/device.
Depending on the application function
connected to a device/sensor (for example, terminals S11–S12–S13 or terminals S11–S12 or
terminals S12-S13 or terminal S12). If only one CH+ terminal is connected, terminal S13 must
remain unconnected.
The control output DC+ provides a nominal voltage of 24 VDC to the connected sensor/device. It
is also used for dynamization
Respect the maximum wire resistance of 500 Ω when determining the cable length. The maximum
wire length between the safety-related input and a sensor/device is 30 m (98.43 ft) if the supply via
the control output (terminals S11) of the safety-related input is not used.
HR9Z-B2190 8/2020
Explanation
Control output (DC+) of safety-related input
Two terminals S11 are provided to facilitate wiring.
Connect only one of the S11 terminals.
Input channels (CH+) of safety-related input
Depending on the selected application function, the
safety-related input is used with terminals S11-S12
only or with terminals S11-S12-S13. Refer to the
chapter Application Functions
Terminal for common reference potential for 24 VDC
signals. The power supplies of the connected
equipment must have a common reference potential
to be connected to this terminal.
Terminals of the safety-related outputs
Pulsed output for diagnostics
safety-related
WARNING
(see page
56) , both or only one of the CH+ terminals are
(see page
42) .
Installation
(see page
56) .
(see page
77) , not
51
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