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4-10 Input / Output MN1904
4.6.3 Digital inputs (Interrupts) - X6
Digital inputs FASTIN0 to FASTIN3 can be used as high speed position latches, allowing any
combination of axes to be captured by the hardware. Using F ASTIN0, the latency between
input triggering and capture is 30µs. Using FASTIN1 to FASTIN3, latency is 1ms. Special Mint
keywords (beginning with the letters FAST...) allow specific functions to be performed as a
result of fast position inputs becoming active. See the Mint help file for details.
Location
Connector X6
(Mating connector: Weidmüller BL 3.5/10, 3.5mm pitch)
Pin Name Mint keyword / description
1 F ASTIN0 FASTSELECT.0
2 Shield Shield connection
3 CREF Common connection
4 F ASTIN1 FASTSELECT.1
5 Shield Shield connection
6 CREF Common connection
7 F ASTIN2 FASTSELECT.2
8 Shield Shield connection
9 CREF Common connection
10 FASTIN3 FASTSELECT.3
Description
Four fast position digital inputs.
Note: The fast inputs are particularly sensitive to noise, so inputs must use shielded
twisted pair cable. Do not connect mechanical switches, relay contacts or other
sources liable to signal ‘bounce’ directly to the fast inputs. This could cause
unwanted multiple triggering.
Active high:
FASTINx = 12-24VDC (±20%)
CREF =0V
CREF
FASTINx
Mint
Vcc
NextMove BX
II
Active low:
FASTINx =0V
CREF = 12-24VDC (±20%)
2k2
TLP115
100pF
Figure 5 - Digital i nput circuit - fast interrupts
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