Baldor NextMove BX, Installation Manual

Page: 27 / 94

Hardware Features
MN1258V4 08/2000
15
Associated MINT keywords are:
#INx, INPUTACTIVELEVEL, IN, INx, INPUTMODE, INPUTNEGTRIGGER,
INPUTPOSTRIGGER, INSTATE
3.4.2 Fast Interrupts: J6
Pin No Signal Function
1
fast-int 0
Fast interrupt 0
2 chassis Chassis ground for cable screen
3 usr-com Common reference
4 fast-int 1 Fast interrupt 1
5
chassis
Chassis ground for cable screen
6 usr-com Common reference
7 fast-int 2 Fast interrupt 2
8 chassis Chassis ground for cable screen
9
usr-com
Common reference
10 fast-int 3 Fast interrupt 3
Interrupt inputs may be 12 to 24V positive or negative with respect to usr-com . usr-com is shared
with the digital inputs.
There is a facility for 4 high speed external interrupts on NextMove BX. These are isolated using
high speed opto-isolators and full bridge rectification. They are driven in the same way as the digital
inputs, see the digital input section for details on the voltage levels. The interrupt inputs can cause an
interrupt on both activating and deactivating edges of the signal. Fast interrupt 0 has a maximum
latency of 30µs. Fast interrupts 1 to 3 have a maximum latency of 1ms.
Because of the fast response time of the input circuitry (approx. 200ns)these inputs are more
susceptible to high frequency noise. Care must be taken with shielding/screening and routing of these
signals, i.e. do not route high speed interrupt cabling near motor drive cabling.
Figure 3-6: Fast Interrupt Input Circuit
See section ‘Fast Position Latch’ in the ‘Mint v4 Programming Guide’ for more details.