Safety technology: MCB14x Document No.:
MG34Y104
Rev.: 06 23 October 2012 Page 8 of 25
2.5. Name and use of inputs and outputs
Name
Use
SS1_1/2 Safe Stop 1
Tripping of Safe Stop 1 (in accordance with EN IEC 61800-5-2)
SLS_1/2 Safe Limited Speed
Enabling of monitoring of derated maximum speed (safely derated
velocity in accordance with EN IEC 61800-5-2)
Door_1/2
Mode feedback of protective interlock
Pr_1
Proximity switch 1
Speed detection in dual channel or Start/Stop in single channel
operation
Pr_2
Proximity switch 21
Speed detection in single channel and dual channel operation
FBC
Feedback contactor
Mode feedback of energy isolator
Table 1: Safety inputs
Name
Use
Ramp
Tripping of ramp signal for controlled drive shutdown
STO_O
Tripping of instantaneous STO (Safe Torque Off in accordance with EN IEC 61800-
5-2)
ExC
Control of contactor to drive energy isolator
SSO
Enabling of protective interlock
Pout_1/2
24 V voltage sources with channel-based test cycles
Table 2: Safety outputs
Name
Output type
Use
Configurable multi-
function output
DIAG
Binary
Faults
Stop
Analog
Equivalent speed constant current 4-20mA
Equivalent speed constant voltage 2-10V
Table 3: Diagnostic output
SS1 must be used.
Pr_1, Pr_2, SLS, Door, FBC and the DIAG diagnostic output can be optionally used.
3. Use when shipped
3.1.
Device operation
If the DEFAULT parameters are retained, then all inputs/outputs and all safety operations are enabled. The
following features must be taken into account:
-
All input signals comply with the fail-safe principle (NC contact type)
-
All inputs must be used in dual channel format
-
All inputs and outputs must be monitored for crossovers and short circuits
-
Drive speed detection is enabled. Appropriate speed sensors must be mounted
-
The outputs are force-sampled by way of low-active test pulses (duration approx. 1ms).
3.2.
DEFAULT application wiring diagram
Figure 2 shows the layout and wiring diagram. Contact-based signallers with NC operation must be used. The
opening of the contact or wire break trips the safety operation assigned to the respective input.
The clocked voltages of the Pout_1/2 outputs must be used to operate the input crossover test. The channel
assignment must be observed.
The supply voltage of the proximity switch must be provided externally for speed detection purposes.
3.3.
Speed detection
The signals are generated by 2 or 3-wire proximity switches. The mechanical condition of the motor shaft is key to
selecting the proximity switch. When mounting, efforts must be made to ensure that at least one switch provides a
high signal when stationary.
