6
Installation and Operation
EDBC250SIO | 2.0
56
Pressure-sensitive mat, bumper
Pressure-sensitive mats and bumpers are used to safeguard the floor around a machine. The
mats are placed in the danger zone and make the control unit change to its safe functional
state whenever pressure is exerted on them. If so, the Safety I/O-module sends a null signal to
the control unit.
Safety I/O-module supports four-wire mats. Two safe digital inputs and the associated test
pulse output are used for one mat / bumper.
You must use the configuration to enable the safe inputs you use and parameter "External
Inputs" to choose the bumper function
►
6.3.3 Input Parameters.
You may use up to two mat channels.
Allocation of safe inputs for the bumper function
Parameter "External Inputs"
Safe inputs used
Safe inputs used
Bit 7
Bit 6
0
0
bumper function not selected
none
0
1
SI0, SI1,
SI0 TP, SI1 TP
1
0
SI2, SI3
SI2 TP, SI3 TP
1
1
SI0, SI1, SI2, SI3
SI0 TP, SI1 TP, SI2 TP, SI3 TP
Safe inputs you do not use are available for other functions.
PLCopen module "SF_ESPE" or a similar module of the safe control unit is used for mat /
bumper analysis. The achievable category to EN ISO 13849 depends on the switching device's
error model and must needs be analysed in conjunction with the PLCopen module's error
detection.
Refer to section
►
7.5 Safety Mats, Connecting Blocks and Bumpers for connection examples.