Festo CMSH - Page 17

Festo — CMSH — 2021-10
Product overview
17
Single-acting drives Double-acting drives
Safety position in case
of electrical power failure,
pneumatic compressed
air supply present
CMSH-...-S-A-..., CAPS-...-S-A-... :
–
Working port (2) on the posi-
tioner is exhausted.
–
Drive moves to the initial posi-
tion.
CMSH-...-D-A-..., CAPS-...-D-A-... :
–
Working port (2) on the posi-
tioner is exhausted, working
port (4) on the positioner is
pressurised.
–
Drive moves to end position.
CMSH-...-D-C-..., CAPS-...-D-C-... :
– Working port (2) and (4) on the
positioner are closed.
– Drive holds last position.
Safety position in case of
failure of the compressed
air supply, electric power
present
CMSH-...-S-A-..., CAPS-...-S-A-... :
–
Working port (2) on the posi-
tioner is exhausted.
–
Drive moves to the initial posi-
tion.
CMSH-...-D-A-..., CAPS-...-D-A-... :
–
Working port (2) on the posi-
tioner is exhausted, working
port (4) on the positioner is
open.
–
Drive position not defined.
CMSH-...-D-C-..., CAPS-...-D-C-... :
– Working port (2) and (4) on the
positioner are closed.
– Drive holds last position.
Safety position in case
of failure of electrical
power and compressed
air supply
CMSH-...-S-A-..., CAPS-...-S-A-... :
–
Working port (2) on the posi-
tioner is exhausted.
–
Drive moves to the initial posi-
tion.
CMSH-...-D-A-..., CAPS-...-D-A-... :
–
Working port (2) on the posi-
tioner is exhausted, working
port (4) on the positioner is
open.
–
Drive position not defined.
CMSH-...-D-C-..., CAPS-...-D-C-... :
– Working port (2) and (4) on the
positioner are closed.
– Drive holds last position.
Tab. 11: Safety position
If the power supply is switched on again, the last operating status is effective immediately.