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3.2.2.5 Recommended Serial Communication Cable Lengths
Connector J8 on the Regulator board is an RS-232 serial communication port. This
connector allows the drive to communicate with external devices such as a personal
computer using RS-232 protocol. See table A.5.
Two RS-232 cables are available from Reliance:
•
•
User-constructed cables can be up to 15 meters (50 feet) in length.
Note that for communication between a GV3000/SE drive and a personal computer,
the Control and Configuration Software (2CS3000) must also be used. Refer to
instruction manual D2-3348 for more information about the CS3000 software.
The Regulator boards have one set of RS-232 transmit/receive lines. These lines can
be accessed by only one device at a time: connector J8, the RS-232 terminals (1-3)
on the terminal strip, or an Operator Interface Module (OIM).
3.2.3 Selecting Input Line Branch Circuit Fuses
Input line branch circuit protection fuses must be used to protect the input power lines.
See figures 5.1 and 5.2. Recommended fuse values are shown in table 3.12. The
input fuse ratings listed in table 3.12 are applicable for one drive per branch circuit. No
other load may be applied to that fused circuit.
3.2.4 Meeting Encoder Specifications (FVC Regulation Only)
GV3000/SE drives set up for FVC regulation require an encoder for closed-loop
operation. Refer to table A.6 for specifications. Drives set up for V/Hz or SVC
regulation do not require an encoder for feedback.
3.2.4.1 Encoder Wiring Guidelines
Encoder connections are considered signal level wiring and, therefore, must be run
separate from control and power wiring. Reliance Electric recommends 18 AWG
unshielded twisted pair wires with 2-3 twists per inch for applications to a maximum
distance of 303 meters (1000 feet). The recommended Reliance Electric part number
is 417900-207CG, 18 AWG, 6 conductor (3 twisted pairs).
3.2.5 Verifying Power Module Output Current Rating Is Greater Than
Motor Full Load Amps
Verify that the GV3000/SE output current rating is greater than the motor's full load
current (amps). Table 2.1 lists the output current values.
Planning Before Installing
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3-meter (10-foot) D-shell 9-pin to 9-pin cable (M/N 2CA3000)
0.3-meter (1-foot) D-shell 9-pin to 25-pin adaptor cable (M/N 2CA3001).
ATTENTION: Most codes require that upstream branch circuit protection
be provided to protect input power wiring. Install the fuses recommended
!
in table 3.12. Do not exceed the fuse ratings. Failure to observe this
precaution could result in damage to, or destruction of, the equipment.
3-9
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