KB Electronics KBMA-24DF - Manual (Page 14)

5 MOUNTING INSTRUCTIONS
The drive is designed with a NEMA-1 / IP-40 enclosure for indoor use. It is recommended that the drive be
mounted vertically on a flat surface with adequate ventilation. Leave enough room below the drive to allow for AC
line, motor connections, and any other wiring that is required. Care should be taken to avoid extreme hazardous
locations where physical damage can occur. When mounting the drive in an enclosure, the enclosure should be
large enough to allow for proper heat dissipation so that the ambient temperature does not exceed 45°C (113 °F)
at full rating. See Figure 2, on page 10. A mounting template is included to facilitate mounting of the drive.
WARNING! Do not use this drive in an explosion-proof application.
6 ELECTRICAL CONNECTIONS
See Table 4, for terminal block wire and tightening torque specifications.
WARNING! Read Safety Warning, on page 5, before using the drive. Disconnect main power
before making connections to the drive. To avoid electric shock, be sure to
properly ground the drive.
Application Note: To avoid erratic operation, do not bundle the AC line and motor wires with each other or
with wires from signal following, start/stop contacts, or any other signal wires. Also, do not bundle motor
wires from multiple drives in the same conduit. Use shielded cables on all signal wiring over 12” (30 cm).
The shield should be earth grounded on the drive side only. Connect the drive in accordance with the
National Electrical Code requirements and other local codes that may apply.
Be sure to properly fuse each AC line conductor that is not at ground potential. Do not fuse neutral or
grounded conductors. A separate AC line switch or contactor must be installed as a disconnect so that
each ungrounded conductor is opened. For fuse or circuit breaker rating, see Table 3, on page 9. Also see
Section 6.1, below and on page 15.
The drive is designed with a removable cover. To open the cover, the two front cover screws must be
removed. After mounting and connections, install and tighten the two front cover screws to
5 in-lbs (6 kg-cm). Do not overtighten.
6.1 AC LINE INPUT CONNECTION – Connect the single-phase AC line input to Terminal Block TB1 (Terminals
“L1”, “L2”), as shown in Figure 7, on page 15.
The rated AC line voltage of the drive must match the actual AC line input voltage setting of Jumper
J1. The drive is factory set for 208/230 Volt AC line input (Jumper J1 not installed). For 115 Volt AC
line input, install Jumper J1 (supplied). See Section 7.1, on page 16.
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Terminal Block Description
Maximum Wire Size (Cu) Recommended Tightening Torque
AWG mm 2
in-lbs kg-cm
TB1 AC Line Input and Motor Wiring 12 3.3 7 8
TB2 Run/Fault Relay Output Contacts 16 1.3 3.5 3
TABLE 4 – TERMINAL BLOCK WIRE & TIGHTENING TORQUE SPECIFICATIONS