TB Wood's WFC1000 Series, Installation, Operation And Maintenance Instructions

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DESCRIPTION OF TERMINALS See Page
MOL 5,
48, 49
CTS 29, 49
RST 48
ST1 34, 49
ST2
ST3
6FS 48
COM 42, 48
SIO+
SIO-
34
Motor Overload input terminal. Requires N.C. contact for operation, referenced to
+24. Connected to +24 by a jumper wire at the factory.
Coast to Stop. Connecting this terminal to +24 turns the drive output OFF,
allowing the motor to coast to a stop. The inverter’s output is cut off, not ramped
to a stop. When the terminal is set to 0 V (open), the drive output is reinstated
and the output will ramp to the programmed frequency. This function may be
used when electro-mechanical brakes are required. This feature can also be
accessed in programming by the 41-RSEL parameter to automatically coast to a
stop on a stop command.
External Fault Reset input terminal. After a fault, connecting this terminal to +24
will reset any fault.
Open collector NPN transistor output connections. Each output can be
individually programmed to respond to any one of eleven conditions. (See
parameters 72-ST1, 73-ST2 and 74-ST3.) Each output can sink up to 50 mA
from a 24 VDC source.
This terminal provides a 24 VDC pulse train output which is 6X or 48X the output
frequency of the inverter. Selected by parameter 88-FRO.
Control circuit common, electrical isolated from the AC line terminals.
Positive connection for the Serial Input/Output Operation communication link.
Responds to RS485 protocol. (See Section 5.)
Negative connection for the Serial Input/Output Operation communication link.
Responds to RS485 protocol. (See Section 5.)
Normally Open contact for the Auxiliary Relay. Will close when the relay is
activated. Rating is 115 VAC at 1 Amp or 250 VAC at 0.5 Amp.
Auxiliary Relay Common terminal. This relay is factory programmed to act as a
Fault Relay but may be reprogrammed to any one of eleven conditions. (See
parameter 75-STR.)
Normally Closed contact for the Auxiliary Relay. Will open when the relay is
activated. Rating is 115 VAC at 1 Amp or 250 VAC at 0.5 Amp.
TABLE 2.8 (Con’t.)
2.9 Environmental Considerations
The WFC
HT
Series Inverter is rated NEMA 4 (through 50 HP), indoor use. This is a sealed unit providing a
degree of protection against falling, splashing and hose-directed water.
If your inverter will be subjected to high-pressure wash-down or atmospheric contaminants such as
acid or caustic vapors, or carbon, metallic, or corrosive dust, contact TB Wood’s Application
Engineering Department for specific instructions.
In order to maintain the NEMA 4 integrity of the WFC HT Inverter enclosure, some care must be exercised when
the cover is installed.
With the smaller chassis configurations (WFC1000 series, WFC2000 series thru 10 HP and WFC4000 series
thru 20 HP), the following cover installation procedure shall be employed:
1. Snug each of the four (4) cover screws into place.
2. Sequentially tighten each screw until the gasket is compressed evenly. Tighten first one corner then
the opposing corner to minimize the chance of pinching the gasket.
3. Tighten these screws to 18-inch pounds of torque.
With the larger chassis configurations, the cover should be installed according to the following procedure:
1. Swing the hinged door closed making sure that the gasket is not pinched.
2. Sequentially tighten each screw until the gasket begins to compress. Alternate sides of the enclosure
when tightening to assure even compression.
3a.If drive serial number is 98279999 or lower, tighten these screws to 10-inch pounds of torque
3b.If drive serial number is 98280000 or higher, tighten these screws to 18-inch pounds of torque.
If the conduit entries are not used, utilize the hole plugs (supplied with the NEMA 4 models and the WCK01
thru WCK04 Chassis Mounting Kits) to close the unused holes. This will assure the enclosure’s environmental
integrity.
Digital
Input
Terminals
Serial
Communi-
cation
Port
Terminals
Auxiliary
Relay
Terminals
(RLY)
Digital
Output
Terminals
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