3) ELECTROSTATIC IMMUNITY. Three ways can be followed to prevent
damages from ESD:
A) PREVENTION: when handling ESD-sensitive electronic parts, ensure the
operator is grounded; test grounding devices on a daily basis for correct
functioning; this precaution is particularly important during controller
handling in the storing and installation phase.
B) ISOLATION: use anti-static containers when transferring ESD-sensitive
material.
C) GROUNDING: when a complete isolation cannot be achieved, a good
grounding can divert the discharge current trough a “safe” path; the
frame of a truck can works like a “local earth ground”, absorbing excess
charge. So it is strongly suggested to connect to truck frame all the
parts of the truck which can be touched by the operator, who is
most of the time the source of ESD.
4.5 Various suggestions
- Never combine SCR low frequency choppers with COMBI AC1 modules. The
filter capacitors contained in the COMBI AC1 module would change the SCR
chopper operation and subject to excessive workload. If it is necessary to use
two or more control units, like the chopper should both be of the Zapimos
family.
- During battery recharge, the COMBI AC-1 must be completely disconnected
from the battery. Beside changing the charging current seen by the battery
charger, the module can be damaged by higher than normal voltages
supplied via the charger.
Page - 22/86 AEQZP0BA – COMBI AC1 - User Manual
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