User guide

14.0 CONTROL WIRING
14.1 GENERAL
14.1.1 KEYPAD CONTROL
 Thedrivecanbecontrolledbythekeypadorbycontroldeviceswiredtotheterminalstrip.Thedrivewill
runfromthekeypad“outofthebox”,requiringnoconnectionstotheterminalstrip.RefertoSection13.0
- KEYPAD CONTROL.
14.1.2 CONTROL WIRING VS. POWER WIRING
 ExternalcontrolwiringMUSTberuninaseparateconduitawayfromallotherinputandoutputpower
wiring.Ifcontrolwiringisnotkeptseparatefrompowerwiring,electricalnoisemaybegeneratedonthe
control wiring that will cause erratic drive behavior. Use twisted wires or shielded cable grounded at the
drivechassisONLY.RecommendedcontrolwireisBelden8760(2-wire)or8770(3-wire),orequivalent.
 Torquethecontrolterminalsto2lb-in(0.2Nm).Becarefulnottoovertorquethecontrolterminals,as
this will cause damage to the terminal strip. This is not covered under warranty and can only be repaired by
replacing the control board.
14.1.3 TB-2: CIRCUIT COMMON
The TB-2 terminals are used as circuit common for the start/stop, forward/reverse, input select,
local/remote, analog input, and analog output functions. There are three TB-2 terminals available on the
terminal strip, and they are all internally connected to each other on the main control board. If necessary
TB-2 may be connected to chassis ground.
NOTE: TB-2 MUST be connected to chassis ground when using serial communications.
14.1.4 SURGE SUPPRESSION ON RELAYS
 Current and voltage surges and spikes in the coils of contactors, relays, and solenoids, etc, near or
connected to the drive, can cause erratic drive operation. Therefore, a snubber circuit should be used on
coils associated with the drive. For AC coils, snubbers should consist of a resistor and a capacitor in series
acrossthecoil.ForDCcoils,afree-wheelingorflybackdiodeshouldbeplacedacrossthecoil.Snubbersare
typically available from the manufacturer of the device.
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