Distech Controls EC-BOS-6AX, Mounting And Wiring Instructions

Page: 13 / 28

Wiring Details
Power Wiring
EC-BOS-6
AX
Mounting and Wiring Instructions
Part Number: 05DI-HIBS6AX-10 Revised: February 2008
13
Figure 3 EC-NPB-PWR module wiring connections.
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 in
Figure 3 .
Caution
Do not plug 24V power into the EC-NPB-PWR (reinsert connector plug) until all other mounting
and wiring is completed. See
“Power Up and Initial Checkout,” page 16.
Power consumption depends on installed accessories and option boards, and may vary from:
•
EC-BOS-6
AX
with EC-NPB-PWR alone: Approximately 8.5VA (AC) or 8.5W (DC)
•
EC-BOS-6
AX
with EC-NPB-PWR and four (4) EC-Net
AX
IO-16 modules, plus option boards: up to 20VA
(AC) or 20W (DC)
EC-NPB-PWR-UN
The EC-NPB-PWR-UN module lets you power the EC-BOS-6
AX
(and if installed, EC-Net
AX
IO-16 modules)
from AC line power, with a universal input range from 90-263Vac. If installing EC-Net
AX
IO-16 modules, the
EC-NPB-PWR-UN installs as the last (end) module in the chain. See Figure 1 on page 6 .
Warning •
A 120Vac or 240Vac circuit powers the EC-NPB-PWR-UN. Disconnect power Disconnect power Disconnect power Disconnect power to this
circuit before installation to prevent electrical shock of equipment damage.
•
Make all connections in accordance with national and local electrical codes. Use copper
conductors only.
•
Do not exceed the 30W capacity of EC-NPB-PWR-UN by powered devices.
Power inpur connections are made to the terminals on the circuit board (cover removal is required). An earth
ground connection must be made to the grounding lug using the supplied earth wire. See
Figure 4 on page 14 .
+
–
Power Module (cover shown removed)
EC-BOS-6
AX
24Vac
Line Voltage
(Mains)
Earth Ground
or
Dedicated 24Vac Transformer
neither side of secondary tied
to earth ground
24Vdc
24Vdc Power Supply
(Polarity Not Critical)
neither side tied to earth