Festo CMSX-...-C-U-F1 series, Manual

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CMSX-...-C-U-F1-...
10 Festo – CMSX-...-C-U-F1-... – 1506a English
3.2 Product variants
The product variants CMSX...-A and CMSX...-C are equipped with different valves. If the operating
voltage supply fails, the valves return to the normal position. If the compressed air supply is switched
on and the operating voltage supply fails, the positioner will react differently depending on the product
variants used.
If the operating voltage supply is switched back on, the last operating status is effective again immedi­
ately. If the regulator is activated, the current setpoint value is valid again immediately.
3.2.1 CMSX-S-...-D-... (rotary, double-acting)
For the product variant
CMSX...-A (
è
Fig. 6,
1
) work­
ing port 2 (
è
Fig. 6,
2
)is pres­
surized and working port 4
(
è
Fig. 6,
4
)is exhausted.
Dependent on the tubing con­
nection of the CMSX with the
drive (
è
Fig. 6,
3
), the pro­
cess valve is opened or closed.
Fig. 6 Neutral position for CMSX-S-...-D-...-A
1 3
V1 V4 V3 V2
3 3
2 4
For the product variant
CMSX...-C (
è
Fig. 7,
1
) the
working ports 2 and 4
(
è
Fig. 7,
2
and
4
) are pres­
surized in order to maintain the
current position of the drive
(
è
Fig. 7,
3
).
Fig. 7 Neutral position for CMSX-S-...-D-...-C
1 3
V1 V4 V3 V2
3 3
2 4