Part Number 12762 Rev 1.1 | April 30, 2014 WIRING DETAILS
Power Wiring
16 NETWORK CONTROLLER 3E & 6E MOUNTING AND WIRING GUIDE |
Note If powering from a 24V transformer, do not power any other equipment
with it. Otherwise, conducted noise problems may result. Also, do not
ground either side of the transformer’s 24V secondary.
Figure 4 NPB-PWR module wiring connections.
Located at the bottom of the NPB-PWR module is a 2-position power connector,
and an earth ground spade lug, as shown in Figure 4.
Connect the supplied earth ground wire to a nearby earth ground point. Unplug the
power connector plug from the module and make connections to it as shown.
Caution Do not plug 24V power into the NPB-PWR (reinsert connector plug) until
all other mounting and wiring is completed. See “Power Up and Initial
Checkout,” page 23.
NPB-PWR-UN
The NPB-PWR-UN module lets you power the controller (and if installed,
connected I/O modules) from AC line power, with a universal input range from
120–240Vac. If installing T-IO-16 modules, the NPB-PWR-UN module mounts as
the last (end) module in the chain. (see Figure 1 on page 9).
Warning • A 120Vac or 240Vac circuit powers the NPB-PWR-UN. Disconnect
power to this circuit before installation to prevent electrical shock or
equipment damage.
• Make all connections in accordance with national and local electrical
codes. Use copper conductors only.
• Do not exceed the 30W capacity of NPB-PWR-UN by the powered
devices.
NPB-PWR (cover removed)
24Vdc
Supplied earth
grounding wire
Earth Ground
24Vac
or
24Vdc Power Supply
(Polarity Not Critical)
neither side tied to earth
Dedicated 24Vac Transformer
neither side of secondary tied
to earth ground
Controller
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