
Parker Hannifin S.p.A. - S.B.C. Division HPD N User’s Manual
24
3.13.
Braking resistor
HPD drives are equipped with an integrated braking resistor. If you intend to dissipate more
power, use an external braking resistor. To connect up the system (which must be carried out
in conditions of complete safety) disconnect the jumper between terminals 9 and 10 of
terminal board X4; connect one end of the resistor to terminal 9 and the other to terminal 11on
X4. The external resistor value must be 40 ohm for HPD2N, HPD5N, HPD8N and HPD16N,
27 ohm for HPD20N and HPD24N, and a thermal magnetic circuit breaker must be installed
between resistor and drive. The minimum wire size for the connection is 4 mm
2
; the
connection cables should be as short as possible and, in any event, no longer than 3 metres.
R
External Resistance
Terminal Board X4 for HPD
Internal Resistance
3.14.
Backup
Precaution for simulation encoder:
- Use an external 24Vdc 2A regulated power supply with protected output.
- Set the parameter b99.8 = 1 (the automatic reset of the undervoltage alarm when the mains
voltage is restored). Now the backup function does not need the external relay.
Furthermore is not required to write in the pico-PLC the programme described in the
example 11 - “Examples and applications” chapter.
Содержание HPD2N
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