Wiring
COM Port Usage
EC-NPB-2X-485 Option
05DI-HI2X485-13
Updated: September 2014
3
Figure 4
EC-NPB-2X-485 inserted, end plate on top.
6.
If unplugged, plug the battery cable back into the
battery connector on the EC-BOS
AX
(see
Figure 4
for location on the EC-BOS-2/3/6
AX
).
7.
For the EC-BOS-2/3/6
AX
series or
EC-BOS
AX
Security
, set the battery and bracket
assembly back over the option card slots, with
mounting holes aligned with the standoffs.
Screws enter holes in the battery bracket first.
Figure 5
Re-fasten screws.
8.
Place the screws through the end plate(s), and into
the standoffs on the base board. Using a
screwdriver, hand tighten screws.
9.
If accessory modules were unplugged from the
EC-BOS
AX
, plug them back as before, and secure.
Wiring
Connect to an RS-485 multipoint network using one of
the 3-position screw terminal connectors, using
shielded 18-22 AWG wiring. Refer to the TIA/EIA-485
standard for more details.
Screw terminals are minus (–), plus (+), and shield (
S
),
as indicated on the EC-NPB-2X-485 end plate
label—see
Figure 1
on page 1.
LEDs
Four LEDs are visible on the top of the
EC-NPB-2X-485 option card (cover must be removed
from EC-BOS
AX
). The label on the EC-NPB-2X-485 end
plate notes these four LEDs as “TX” and “RX”—see
Figure 1
on page 1.
The two LEDs for each port are described as follows:
•
TX (yellow) — Transmit, indicates that the
EC-BOS
AX
is
sending
data to a device connected on
the RS-485 trunk.
•
RX (green) — Receive, indicates that the
EC-BOS
AX
is
receiving
data from a device
connected on the RS-485 trunk
COM Port Usage
The EC-NPB-2X-485 option card has two onboard
UARTs, and so adds
two
COM ports on the installed
EC-BOS
AX
controller. The hosted station
automatically resolves the option’s COM addresses.
•
If an EC-BOS-2/3/6
AX
or EC-BOS
AX
Security
controller and installed in Option Slot 1, or if the
only
option card, ports are COM3 and COM4.
•
If an EC-BOS-7
AX
controller and installed in Option
Slot 1, or if the
only
option card, ports are COM5 and
COM6.
If installed in Slot 1 of an EC-BOS
AX
along with
another
option card that uses COM ports in Option Slot 2, note
that COM assignments for that other card are affected.
For example, if an EC-BOS-2/3/6
AX
with an
EC-NPB-2X-485 option installed in Slot 1, and a single
port RS-232 option installed in Slot 2, COM assignments
are: Slot 1 (RS-485): COM3, COM4, Slot 2 (RS-232):
COM5.
The same option card mix in an EC-BOS-7
AX
controller
yields: Slot 1 (RS-485): COM5, COM6, Slot 2 (RS-232):
COM7
Place custom end
plate over end of
option card.
Insert option card into
option card slot
carefully, with
pins
aligned
.
Fully seat card.
EC-BOS
AX
Battery
Connector
EC-BOS-2/3/6
AX
EC-BOS-2/3/6
AX
Hand tighten the
4 screws through
battery bracket,
end plates, into
standoffs.
