Publication 20A-IN009C-EN-P
32 PowerFlex® 70 Adjustable Frequency AC Drive Installation Instructions
The optional PowerFlex Safe-Off board,
when used with suitable safety
components, provides protection
according to EN 954-1:1997; Category 3
for safe off and protection against restart.
The PowerFlex safe off option is just one
safety control system. All components in
the system must be chosen and applied
correctly, to achieve the desired level of
operator safeguarding.
Important: The drive ships with the hardware enable jumper (ENBL
JMP) installed. This jumper must be removed when using
the DriveGuard® Safe-Off option. Failure to remove the
jumper will cause the drive to fault when a start command
is issued.
Table K Terminal Description
For detailed information on installing and wiring a safety relay system,
refer to the DriveGuard Safe-Off Option (Series B) for PowerFlex 40P
and PowerFlex 70 AC Drives User Manual, publication PFLEX-UM003.
Important:If the Safe-Off board is
removed from the drive, pins 3 and 4 of
the Safe-Off Connector must be
jumpered for the drive to run. If the
Safe-Off board or the jumper is not
installed, and the drive is commanded
to run, an F111 “Enable Hardware”
fault will occur.
Safe Off Board Option (Enhanced Control Only)
No. Signal Description
1 Monitor - N.C. Normally closed contacts for monitoring relay status.
Maximum Resistive Load: 250V AC / 30V DC / 50 VA / 60 W
Maximum Inductive Load: 250V AC / 30V DC / 25 VA / 30 W
2Common - N.C.
3 +24V DC
Connections for user supplied power to energize coil.
4 24V Common
1234
0.8…1.1 N•m
(7…10 lb•in)
20A-DG01
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