Parker Hannifin
Figure 27 Loop-Back Diode with Shared Power Supply
For more information, see “Enable Connector” on page 52.
NOTE: Parker-built servo motors include protection with their internal
brakes. These are in the form of full-wave rectifiers for the BE, J,
M/SMN (serial number 050801nnnnn and up), MPP, Neo and SM
series motors and loop-back diodes for M/SMN (before serial
number 050801nnnnn), and MPM series motors. Be sure to observe
polarity for brake connections for motors equipped with loop-back
diodes.
Some Parker Daedal-built positioners with external brakes do not
have protection diodes installed. For these positioners with external
brakes, the diode would go between the brown (+24VDC) and blue
(24V RTN) wires.
COM1 Connection
Connect the ACR90x0 controller directly to a personal computer (PC) or
similar serial device through the COM1 port,
only after properly configuring
your cable and connectors. (For mating-connector specifications, see COM1
Mating-Connector Specification on page 55.) The COM1 port is located on
the front panel of the unit. The unit does not provide a COM2 port.
Note: Do not connect the ACR90x0 controller in an RS-232 or RS-485 daisy
chain or multi-drop network; it will not function properly.
The COM1 port is hardware configurable for either an RS-232 or RS-485
full-duplex operation. (It does not support half-duplex operation.) Use the
information in this section to configure your cable and connectors for RS-232
or RS-485 operation. The controller does not provide internal termination
resistors for RS-485 operation. If termination is required, you must add it
externally. Figure 28 shows the pin assignments for RS-232 and RS-485
operation.
72 ACR9000 Series Hardware Installation Guide
www.comoso.com
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