
5.3
SBC installation
Inputs and outputs for the SBC safety functions
The 2-channel request of the safety function is made over the digital inputs #SBC-A and #SBC-B at the
connection [X1A]. The SBA diagnostic output displays whether the safe status has been reached for
the SBC safety functions. The holding brake is connected over the connection [X6B]. The external
clamping unit is connected over the connection [X1C].
Connection Pin
Type
Identifier
Function
X1A.9
#SBC-B
Safe brake control, channel B
X1A.10
DIN
#SBC-A
Safe brake control, channel A
[X1A]
X1A.21
DOUT
SBA
Safe torque off acknowledge
X1C.1
BR-EXT
Output for connection of an external clamping
unit (high side switch)
[X1C]
X1C.5
DOUT
GND
Reference potential
X6B.1
–
PE
Protective earth
X6B.2
BR+
Holding brake (positive potential)
[X6B]
X6B.3
OUT
BR–
Holding brake (negative potential)
Tab. 9 Inputs and outputs for the SBC safety function
SBC connection example
The SBC safety function (safe brake control) is triggered by an input device that makes the safety
request.
Installation
24
Festo — CMMT-AS-...-S1 — 2018-02