KB Electronics KBPC-225D - Manual (Page 10)

8
FIG. 4A – CAPTIVE SCREW
TIGHTENED IN CASE
CAPTIVE SCREW
COVER
GASKET
CASE
FIG. 4B – CAPTIVE SCREW ENGAGED
IN FRONT COVER
GASKET
COVER
CASE
CAPTIVE SCREW
V. WIRING
WARNING! – Read Safety Warning on page 3 before attempting to use this control.
Wire control in accordance with the National Electric Code requirements and other
codes that apply. Be sure to fuse each conductor which is not at ground potential. Do not fuse
neutral or grounded conductors. Note: See Section VI. Fusing (p.10). A separate AC line
switch, or contactor, must be wired as a disconnect switch, so that the contacts open each
ungrounded conductor. (See Fig. 5 for AC Line and Armature connection.)
To maintain the watertight integrity of the control, be sure to use suitable watertight connectors and
wiring, which are appropriate for the application. Two .875" (22.2 mm) knockout holes are provided
for a standard 1/2" knockout connector (not supplied) for wiring. A watertight plug is provided if
only one knockout is required.
A. AC Line – Connect AC Line to terminals L1 and L2. Note: External 25A fuse must be added.
See section VI (p. 10).
B. Motor Armature – Connect motor armature to terminals A1 (+) and A2 (–). Note: If motor
operates in the wrong rotation, reverse the connection of armature leads A1 and A2.
WARNING! – Armature switching can cause catastrophic failure of motor and/or control.
Therefore, do not wire switches or relays in series with the armature.
WARNING! – Electrical noise can cause erratic operation and/or control failure and
therefore must be eliminated. Do not bundle AC and motor wires with other wires (e.g.,
potentiometer, analog input, Forward-Brake-Reverse, etc.). Shielded cables may have to
be used for externally connected switches, potentiometers, analog inputs and tachometer
wiring. Do not ground shield or connect shield to any other wiring.
C. Field [For Shunt Wound Motors Only]
Do not use terminals F1 and F2 for any other
purpose than to power the field on a shunt
wound motor. Connect motor shunt field to
terminals F1 and F2 for 180 VDC motors with
200 VDC fields. For motors with half voltage
fields (180 VDC motors with 100 VDC fields),
connect field to terminals F1 and L1. See
Table 3 for summary of Field Connections.
See Figure 6A and Figure 6B (p. 9) for field
wiring diagrams.
CAUTION – Shunt-Wound motors may be
damaged if field remains connected with-
out motor rotating for an extended period
of time. FIG. 5 – CONNECTION DIAGRAM
ARMATURE
TB1
AC LINE
INPUT
A1 A2 L1 L2
(3)
FUSES
25A
250V
TABLE 3 – FIELD CONNECTIONS (Shunt Wound Motors Only)
AC LINE VOLTAGE FIELD VOLTAGE (VDC) FIELD CONNECTION FIELD TYPE
230 200 F1, F2 Full Voltage
230 100 F1, L1 Half Voltage