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1/08
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Wiring guidelines
Metreau keypads require 12 VDC power to operate properly. The necessary power is
supplied via the AxLink or SWT cable. The maximum wiring distance is determined
by power consumption, supplied voltage, and the wire gauge used for the cable. The
following table lists wire sizes and the maximum lengths allowable based on the
maximum power consumption rating of 170 mA.
The maximum wiring lengths for using AxLink power are based on a minimum of
13.5 volts available. If the distance is greater than what is listed in the table, consult
the
Metreau Keypads Operation/Reference Guide
for wiring with external power
sources.
AxLink Data and Power Connections
Connect the control system's AxLink connector to the AxLink connector on the rear
panel of the Metreau Keypad for data and 12 VDC power as shown in FIG. 4.
Using AxLink for Data with an Auxiliary Power Supply
Use an auxiliary 12 VDC power supply when the distance between the controller and
server exceeds the limits described in the
Wiring guidelines
section. Connect only
the GND (-) wire on the AxLink connector when using an auxiliary 12 VDC power
supply.
Connect the NetLinx Controller’s AxLink connector to the AxLink connector on the
rear panel of the Metreau keypad, as shown in FIG. 5.
Note
: If you are not using power from AxLink, disconnect the wiring from the
controller before wiring the Metreau keypad. Make sure the auxiliary power supply’s
PWR (+) is not connected to the controller’s AxLink connector.
AxLink Status LED
The AxLink Status LED (located next to the AxLink connector), lights to indicate
AxLink power/data status (see Operation / Reference Guide for details).
If the LED is on and not flashing, disconnect the AxLink connector and recheck all
AxLink connections. Then, reconnect the AxLink connector to the panel and verify
the LED is flashing once per second.
Mounting Procedures
AMX recommends mounting Metreau keypads in standard U.S.-style decora
wallboxes:
•
Conduit box should meet NEC specs (section 370)
•
Minimum internal clearance of (HWD) 2-5/8" x 1-3/4" x 1-5/8".
Note
: Before touching the device, discharge the static electricity from your body by
touching a grounded metal object.
Wallbox Mounting
1.
Use the cutout dimension for the wallbox to cutout the install surface.
2.
Connect the AxLink connector (or SWT cable connectors) to the rear of the
keypad.
3.
Place the Mounting Plate on the wallbox; align the screw holes with the mount-
ing holes and fasten the Mounting Plate to the wallbox using the screws sup-
plied.
Note
: Do not overtighten the screws when mounting the Mounting Frame. The
device should be flush with mounting surface.
Mounting Dimensions
FIG. 6 provides detailed dimensions for the 7-button Metreau keypads.
Programming
There are a select number or SEND_COMMANDs the Metreau keypad recognizes.
For a full list and descriptions, consult the
Metreau Keypads Operation/Reference
Guide
.
Sending Firmware to Metreau Keypads (AxLink)
The Firmware on the AxLink-enabled Metreau keypads (MET-6N, MET-7 and
MET-13) can be updated via the NetLinx Studio2 application:
Note
: Refer to the NetLinx Studio 2 online help for additional details on firmware
transfers. NetLinx Studio 2 is available for free download from www.amx.com.
1.
Open NetLinx Studio2.
2.
Go to
Tools > Firmware Transfers > Send to Axcess Device...
This opens
the
Send to Axcess Dialog Window
.
3.
Browse to the location of the firmware file.
4.
Select the file within the
Files
frame.
5.
Click
Query for Devices
.
6.
Select the Metreau keypad within the
Devices
frame.
7.
Click
Send
and then
Close
.
8.
Upon confirmation of a successful send, you can exit NetLinx Studio2.
Additional Documentation
Refer to the
Metreau Keypads Operation/Reference Guide
(available online
www.amx.com) for additional information on configuration, programming and using
the Metreau keypads.
AxLink Wiring Guidelines at 170 mA
Wire Size
Maximum Wiring Length
18 AWG
690.42 feet (210.43 m)
20 AWG
436.80 feet (133.13 m)
22 AWG
272.33 feet (83.00 m)
24 AWG
171.66 feet (52.32 m)
FIG. 4
AxLink straight-thru wiring
FIG. 5
AxLink and 12 VDC power supply wiring diagram
PWR +
AXP
AXM
GND -
PWR +
AXP
AXM
GND -
Control System
Metreau Keypad
Metreau keypad
NetLinx Controller
PWR (+)
GND (-)
PWR +
AXP
AXM
GND -
12 VDC power supply
PWR +
AXP
AXM
GND -
FIG. 6
Mounting Dimensions - MET-7
