Moxa Technologies AirWorks AWK-3121 User manual

P/N: 1802031210016
*1802031210016*
AWK-3121
Quick Installation Guide
Moxa AirWorks
Edition 7.0, June 2016
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-free: 800-820-5036
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
2016 Moxa Inc. All rights reserved.

- 2 -
Overview
The AWK-3121 Access Point (AP) is ideal for hard-to-wire industrial
applications. The AP keeps wireless costs under control and integrates
with existing mobile equipment. The AWK-3121 is compliant with the
industrial standards and approvals covering operating temperature,
power input voltage, surge, ESD, and vibration. Installation is easy with
DIN-rail mounting capability for installation in distribution boxes. The
DIN-rail mounting capability, wide operating temperature range, and
IP30 housing with LED indicators make the AWK-3121 a convenient yet
reliable solution for any industrial wireless application.
Package Checklist
Moxa’s AWK-3121 is shipped with the following items. If any of these
items is missing or damaged, please contact your customer service
representative for assistance.
•1 AWK-3121
•2 Dual-band omni-directional antennas (2 dBi, RP-SMA, 2.4 a 5 GHz)
•1 Cable holder with a screw
•2 Protective caps
•Quick installation guide (printed)
•Warranty card

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Panel Layout of the AWK-3121
1. Grounding screw
2.
Terminal block for PWR1, PWR2,
relay, DI1, and DI2
3. Reset button
4. Heat dissipation orifices
5. System LEDs: PWR1, PWR2,
PoE (discontinued starting with
HW Rev 2.0.0), FAULT, and
STATE LEDs
6. LEDs for signal strength
7. WLAN LEDs: CLIENT, BRIDGE,
and WLAN LEDs
8. RS-232 console port
9. 10/100BaseT(X) RJ45 Port
10.
10M LED
11.
100M LED
12.
MAIN antenna port
13.
AUX antenna port
14.
Model name
15.
Screw hole for wall-
mounting kit
16.
DIN-rail mounting kit

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Mounting Dimensions
Unit = mm (inch)
DIN-Rail Mounting
The aluminum DIN-rail attachment plate should be fixed to the back panel
of the AWK-3121 when you take it out of the box. If you need to reattach
the DIN-rail attachment plate to the AWK-3121, make sure the stiff metal
spring is situated towards the top, as shown in the figures below.
STEP 1:
Insert the top of the DIN
rail into
the slot just
below the stiff metal
spring.
STEP 2:
The DIN
-rail attachment unit will
snap into place as shown below.
To remove the AWK-3121 from the DIN rail, simply reverse Steps 1 and 2.

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Wall Mounting (optional)
For some applications, it may be more convenient to mount the
AWK-3121 to a wall, as illustrated below.
STEP 1:
Remove the aluminum
DIN
-rail attachment plate
from the AWK
-3121, and
then attach the wall
-
mount
ing plates with M3
screws, as shown in the
adjacent diagrams.
STEP 2:
Mounting the AWK
-3121 to a wall requires 4 screws.
Use the AWK
-3121 device, with wall-mounting
plates
attached, as a guide to mark the correct locations of
the 4 screws. The heads of the screws should be less
than 6.0 mm in diameter, and the
shafts should be less
than 3.5 mm in diameter, as shown in the figure at the
right.
Do not drive the screws in all the way into the wall—leave a space of about
2 mm to allow room for sliding the wall-mounting panel between the wall
and the screws.
NOTE
Test the screw head and shank size of the screws by inserting the
screws
into one of the keyhole shaped apertures of the
wall-mounting plate before attaching the plate to the wall.
STEP 3:
Once the screws are fixed into the
wall, insert the four screw heads
through the large opening of the
keyhole
-
shaped apertures, and then
slide the AWK
-
3121 downwards, as
indicated to the right. Tighten the
four screws for added stability.
Wiring Requirements
WARNING
Safety First!
Be sure to disconnect the power cord before installing and/or
wiring your Moxa AWK-3121.

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WARNING
Safety First!
Calculate the maximum possible current in each power wire and
common wire. Observe all electrical codes
dictating the
maximum current allowed for each wire size.
If the current goes
above the maximum ratings, the wiring could overheat, causing
serious damage to your equipment.
You should also pay attention to the following items:
•Use separate paths to route wiring for power and devices. If power
wiring and device wiring paths must cross, make sure the wires are
perpendicular at the intersection point.
NOTE
Do not run signal or communications wiring and power wiring in
the same wire conduit. To avoid interference, wires with different
signal characteristics should be routed separately.
•You can use the type of signal transmitted through a wire to
determine which wires should be kept separate. The rule of thumb is
that wiring with similar electrical characteristics can be bundled
together.
•Keep input wiring and output wiring separate.
•It is strongly advised that you label wiring to all devices in the system
when necessary.
ATTENTION
This product is intended to be supplied by a Listed Power Unit
marked
“Class 2”, “LPS” or “Limited Power Source” and rated
O/P:
12 to 48 VDC, 0.121 to 0.494 A
Make sure
the external power adapte
r (includes power cords and
plug assemblies) provided with the unit is certified and suitable
for use in your country.
Before connecting the AWK to the DC power inputs, make
sure
that the DC power source voltage is stable.
Grounding the Moxa AWK-3121
Grounding and wire routing help limit the effects of noise due to
electromagnetic interference (EMI). Run the ground connection from the
ground screw to the grounding surface prior to connecting devices.
ATTENTION
This product is intended to be mounted
on a well-grounded
mounting surface, such as a metal panel.
There must be no
electrical potential difference between any two grounding points;
otherwise, there is a risk that it would damage the device.

- 7 -
Installations with Unstable Power Inputs
There are cases where the device has to be wired to the same power
source as other equipment. In such cases if equipment such as motors
that are connected in the circuit draw a large amount of current during
operation, the transient voltage drop could potentially cause the AWK to
become unstable. Installing a DC/DC power isolator in between the two
equipment is recommended to isolate the transient effect and to ensure a
stable power input for the AWK.
Installations with Cable Extended Antennas for Outdoor
Applications
If the antenna or the AWK device is installed outdoors or in an open-air
setting, proper lightning protection is required to prevent direct lightning
strikes on the AWK device. In order to prevent coupling currents from
nearby lightning strikes, a lightning arrester should be installed as part of
your antenna system. Ground the device, antenna, as well as the arrester
properly to provide maximum outdoor protection for the device.

- 8 -
Arrester Accessories
•SA-NMNF-01: Surge arrester, N-type (male) to N-type (female)
•SA-NFNF-01: Surge arrester, N-type (female) to N-type (female)
Wiring the Redundant Power Inputs
The top two pairs of contacts of the 10-contact terminal block connector
on the AWK-3121’s top panel are used for the AWK-3121’s two DC inputs.
Top and front views of the terminal block connector are shown here.
STEP 1: Insert the negative/positive DC wires
into the
V-/V+ terminals.
STEP
2: To keep the DC wires from pulling
loose,
use a small flat
-
blade screwdriver to tighten the
wire
-clamp screws on the front of the terminal
block connector.
STEP 3:
Insert the plastic terminal block
connector prongs into the terminal block
receptor, whic
h is located on the AWK-3121’s t
op
panel.
ATTENTION
Before connecting the
AWK-3121
to the DC power inputs, make
sure the DC power source voltage is stable.
Wiring the Relay Contact
The AWK-3121 has one relay output, which consists of the two contacts of
the terminal block on the AWK-3121’s top panel. Refer to the previous
section for detailed instructions on how to connect the wires to the
terminal block connector, and how to attach the terminal block connector
to the terminal block receptor. These relay contacts are used to indicate
user-configured events. The two wires attached to the Relay contacts
form an open circuit when a user-configured event is triggered. If a
user-configured event does not occur, the Relay circuit will be closed.
Wiring the Digital Inputs
The AWK-3121 has two sets of digital input—DI1 and DI2. Each DI
comprises two contacts of the 10-pin terminal block connector on the
AWK-3121’s top panel. You can refer to the “Wiring the Redundant Power
Inputs” section for detailed instructions on how to connect the wires to
the terminal block connector, and how to attach the terminal block
connector to the terminal block receptor.
Cable Holder Installation (Optional)
You can attach the cable holder to the bottom of the AWK-3121. This
helps to keep cabling neat and avoid accidents that result from untidy
cables.

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STEP 1: Screw the cable holder onto the bottom
of the AWK
-3121.
STEP 2:
After mounting the AWK-3121 and plugging in the LAN cable,
tighten the
cable along the device and wall.
Communication Connections
10/100BaseT(X) Ethernet Port Connection
The 10/100BaseT(X) ports located on the AWK-3121’s front panel are
used to connect to Ethernet-enabled devices.
Below we show pinouts for both MDI (NIC-type) ports and MDI-X
(HUB/Switch-type) ports.
MDI Port Pinouts
MDI-X Port Pinouts
8-pin RJ45
Pin
Signal
Pin
Signal
1
Tx+
1
Rx+
2
Tx-
2
Rx-
3
Rx+
3
Tx+
6
Rx-
6
Tx-
RS-232 Connection
The AWK-3121 has one RS-232 (8-pin RJ45) console port located on the
front panel. Use either an RJ45-to-DB9 or RJ45-to-DB25 cable to connect
the Moxa AWK-3121’s console port to your PC’s COM port. You may then
use a console terminal program to access the AWK-3121 for console
configuration.

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Console Pinouts for 10-pin or 8-pin RJ45
10-Pin
Description
8-Pin
1
–
2
DSR
1
3
RTS
2
4
GND
3
5
TxD
4
6
RxD
5
7
DCD
6
8
CTS
7
9
DTR
8
10
–
NOTE
1. The pin numbers for the DB9 and DB25 male connectors,
and hole numbers for the DB9 and DB25 female
connectors
are labeled on the connector strip. However, the numbers
are typically quite small, so you may need to use a
magnifying glass to see the numbers clearly.
2. The pin numbers for both 8-pin and 10-
pin RJ45 connectors
(and ports) are typically not labeled on the connectors
(or
ports). Refer to the pinout diagram above for details.
ATEX Information
1. DEMKO certification number: 10 ATEX 0902666X
2. Ambient range (-40°C ≤Tamb ≤75°C)
3. Certification string: Ex nA nL IIC T4
4. Standards covered ( EN60079-0:2006, EN60079-15:2005)
5. The conditions of safe usage:
a. The Ethernet Communication Devices are intended for mounting
in an IP54 enclosure and used in an area of not more than
pollution degree 2 as defined by IEC60664-1.
b. Conductors suitable for use in an ambient temperature greater
than 93°C must be used for the Power Supply Terminal.
c. A 4 mm2 conductor must be used when connection to the
external grounding screw is utilized.
d. Cables must be suitable for use in an ambient temperature
greater than 93°C.