Elster EA Gatekeeper 2120 User manual

General
Within the EnergyAxis®System, the EA_Gatekeeper is the intelligent interface between the EnergyAxis
Management System (EA_MS) and the local area network created by the gatekeeper (referred to as the
EA_LAN). As the interface, gatekeepers are equipped with WAN and LAN communication capabilities.
Depending on the need, utilities have options when choosing how to deploy the EA_Gatekeeper into
service. For example, the EA_Gatekeeper module can be installed in an A3 ALPHA®meter if revenue
metering is required at a particular site. If deploying meter-based gatekeepers is neither feasible nor
desired, the EA_Gatekeeper can be enclosure mounted in different form factors.
This leaflet explains how to install the gatekeeper model 2120.
This model of EA_Gatekeeper is configured for 120VAC operation only and uses a battery for backup
gatekeeper operation if AC power fails at site. The EA_Gatekeeper model 2120 uses a NEMA-4 rated
polycarbonate enclosure. The EA_Gatekeeper supports different mounting options, including mounting
on 18-foot (5-meter) to 35-foot (11-meter) utility poles and telephone poles. Instructions on preparing the
EA_Gatekeeper model 2120 for pole mounting are provided in the instructional leaflet IL42-5019.
Figure 1 shows the major components of the EA_Gatekeeper model 2120. Figure 2 shows an illustration
of an assembled gatekeeper.
Because of the self discharge rate of the system backup battery, this product must be powered up
within 60 days of receiving. If the battery drops below 11.25 VDC for an extended period, the battery
may need to be charged with a shop charger or be replaced.
EA_Gatekeeper model 2120
Installation instructions
IL42-5037A

EA_Gatekeeper model 2120 2
Figure 1. Isometric view of EA_Gatekeeper model 2120
Figure 2. EA_Gatekeeper model 2120
Gatekeeper
electronics module
Ethernet cable
Parts bag
Wall mounting flange
LAN antenna
Enclosure vent
Lockable
hasps
Ethernet
surge protector
1
2
3
4
56
7
8
9
10 11
1
1Wall mounting flange
2SPD modules
3AC line breaker
4DC fuse holder
5TOU backup battery
6Gatekeeper electronics module
7LAN antenna
8
Operational battery charger
9
Operational backup battery
10
Cable entry gland
11
PE ground lug

EA_Gatekeeper model 2120 3
Figure 3. Approximate dimensions
Before you install
Use authorized utility procedures when installing the EA_Gatekeeper model 2120. Equipment
damage, personal injury, or death can result if authorized utility procedures are not followed when
installing the EA_Gatekeeper model 2120.
For optimal performance of the LAN antenna, Elster recommends that the EA_Gatekeeper model 2120
be installed so that the enclosure is at least 5 feet (1.5 meters) off the ground. Failure to meet the
minimum ground clearance can result in degraded performance of the EA_Gatekeeper model 2120
communications within the EnergyAxis System.
The EA_Gatekeeper model 2120 supports different mounting options, including mounting on 18-foot (5-
meter) to 35-foot (11-meter) utility poles and telephone poles. The gatekeeper may have been shipped
with the necessary hardware to support your mounting option, or your utility may have ordered the
mounting hardware separately. Regardless of how the mounting hardware is provided, be sure to
follow your utility's instructions for mounting the EA_Gatekeeper model 2120 at its installation location.
Pole mounting kit, available from Elster, is required. Contact Elster for ordering information.
The EA_Gatekeeper model 2120 is designed to operate from 120 VAC only. Power is routed through the
AC line power entry gland and the wires land on the screw terminals located on the bottom side of the
SPD module. The screw terminals should be torqued to 12 inch-pounds. The cable entry gland dome
nut must be torqued to 20 inch-pounds.
10.5 7.4
8.9
12.4
13.7
Ethernet
entry gland Power entry gland

EA_Gatekeeper model 2120 4
To maintain the NEMA 4X integrity of the device, steps must be taken to ensure proper sealing of the
enclosure features. The cable used for Ethernet communications and to power the EA_Gatekeeper
model 2120 must be a smooth round jacketed outdoor rated cable. The enclosure lid screws must be
installed in the corners of lid and torqued to 20 inch-pounds. These screws are provided in the parts
bag attached to the inside of the enclosure lid. This product is equipped with an anti-condensation
heater and must not be installed in the field without being powered for operation. The enclosure
should not be opened when ambient temperatures fall below 32 °F (0 °C). Opening the enclosure lid
when temperatures are below freezing may result in damage to the enclosure lid gasket
compromising the seal. If the enclosure must be opened when temperatures are below freezing,
gently warm the enclosure around the lid gasket to ensure the gasket is not frozen to the sealing
surface.
LAN Communications
The Antenna is mounted on the unit itself (that is, local external antenna), so no additional steps are
required when placing the EA_Gatekeeper model 2120 into service.
WAN Communications
EA_Gatekeeper model 2120 is equipped with an Ethernet communications option board. This option
board is connected to an internal Ethernet surge suppressor. The external Ethernet device cable is
routed through the Ethernet cable gland and connected into the bottom of the Ethernet surge
suppressor. The cable used should be rated for outdoor use, have a minimum of CAT 5 rating and
have EMI/RFI shielding with conductive RJ-45 connectors. The cable shielding is connected to ground
on the EA_Gatekeeper side and should be left ungrounded on the external equipment side to prevent
a ground loop scenario.
Placing the EA_Gatekeeper model 2120 into service
Use authorized utility procedures when installing the EA_Gatekeeper model 2120. Dangerous
voltages are present. Equipment damage, personal injury, or death can result if authorized utility
procedures are not followed when installing the EA_Gatekeeper.
Be sure to properly ground the EA_Gatekeeper before placing the gatekeeper into service.
The EA_Gatekeeper model 2120 is shipped with most of the wiring connections already made. To
complete the wiring and place the gatekeeper into service:
1 Determine the power supply requirements for the site. The EA_Gatekeeper model 2120 is designed
to operate on 120 VAC only. Powering this device from anything other than a 120 VAC service will
result in product damage or faulty operation.
2 Be sure to properly ground the gatekeeper by connecting the protective earth wires to the ground lug
(see Figure 2).
3 After inserting the Ethernet cable through the gland, clamp the ferrite bead around the ethernet cable
where it exits the enclosure (see Figure 4 for an illustration). Be sure to secure the ferrite bead with the
two wire ties provided.
4 Wire the power and ground to the EA_Gatekeeper. Power is applied to the EA_Gatekeeper by a
cable that enters the enclosure through the base of the unit and connects to the AC line SPD. Line

EA_Gatekeeper model 2120 5
power is connected to the “L1” terminal, neutral is connected to “L2”, and ground is connected to the
“G” terminal.
5 Insert the battery fuse into the fuse terminal.
To preserve battery life during shipment and storage, the EA_Gatekeeper is provided without the
battery fuse installed. To ensure that the battery is available as a backup power supply, insert the
battery fuse into the fuse holder.
6 When you are ready to activate the EA_Gatekeeper, close the circuit breakers.
After completing these steps, verify proper EA_Gatekeeper operation.
Figure 4. Location of ferrite bead
Verifying EA_Gatekeeper operation
In addition to the operation of the LCD on the EA_Gatekeeper electronic assembly, the gatekeeper has
two LEDs that indicate the status of the power supply. The green LED is located on the surge suppressor
and indicates the presence of AC power. The red LED is located on the battery charger and indicates
the status of the backup battery power supply.
LED color Location Indicator Definition
Green Surge
suppressor
On (steady) Gatekeeper is operating using the main power supply.
Off Main power supply is missing or below operating
threshold.
Red Battery charger On (steady) Backup battery is charging.
Blinking EA_Gatekeeper is operating using the backup battery.
Off The backup battery is fully charged. The gatekeeper is
operating using the main power supply.
Ferrite bead
Wire tie (2)

EA_Gatekeeper model 2120 6
DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY
There are no understandings, agreements, representations, or warranties either express or implied, including warranties of merchantability or fitness
for a particular purpose, other than those specifically set out by any existing contract between the parties. Any such contract states the entire
obligation of the seller. The contents of this document shall not become part of or modify any prior existing agreement, commitment, or relationship.
The information, recommendations, descriptions, and safety notices in this document are based on Elster Solutions, LLC experience and judgment
with respect to operation and maintenance of the described product. This information should not be considered as all-inclusive or covering all
contingencies. If further information is required, Elster Solutions, LLC should be consulted.
No warranties, either expressed or implied, including warranties of fitness for a particular purpose or merchantability, or warranties arising from the
course of dealing or usage of trade, are made regarding the information, recommendations, descriptions, warnings, and cautions contained herein.
In no event will Elster Solutions, LLC be responsible to the user in contract, in tort (including negligence), strict liability or otherwise for any special,
indirect, incidental, or consequential damage or loss whatsoever, including but not limited to: damage or loss of use of equipment, cost of capital,
loss of profits or revenues, or claims against the user by its customers resulting from the use of the information, recommendations, descriptions, and
safety notices contained herein.
© 2013 by Elster. All rights reserved. Produced in the United States.
Elster Solutions
Raleigh, North Carolina
Technical support: 800 338 5251
FCC and Industry Canada Compliance
User Information (Part 15.105)
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
• reorient or relocate the receiving antenna
• increase the separation between the equipment and the receiver
• connect the equipment into an outlet on a circuit different from that to which the receiver is connected
• consult the dealer or an experienced radio/TV technician for help
If you experience trouble with this equipment, please use the Return Material Authorization (RMA) feature available at the
Online Customer Services at www.elstersolutions.com. Do not attempt to repair this equipment yourself unless you are replacing
the entire module.
Compliance Statement (Part 15.19)
This device complies with Part 15 of the FCC Rules and Class B digital apparatus requirements for ICES-003. Operation is
subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation of the device.
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.
Énoncé de conformité
Cet appareil est conforme à la Partie 15 des règles de la FCC et aux exigences relatives aux appareils numériques de classe B
conformément à l'avis sur la compatibilité électromagnétique ACEM-3. L'utilisation de cet appareil est soumise aux deux
conditions suivantes : (1) Cet appareil ne doit pas provoquer d'interférences nocives et (2) cet appareil doit accepter toutes les
interférences reçues notamment celles pouvant provoquer un fonctionnement intempestif de l'appareil.
Antenna Compliance
To reduce potential interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than permitted for successful communication. Under Industry Canada regulations, this radio
transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry
Canada.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ouinférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
Warning (Part 15.21)
Changes or modifications not expressly approved by Elster could void the user's authority to operate the equipment.
RF Radiation Safety Guidelines
The device should be installed in a location where there will be a separation greater than 20 cm (8 inches) from locations
occupied by humans.
Collocation Statement
Collocation of simultaneously-transmitting (co-transmitting) antennas located within 20 cm of each other within a final product
is not allowed.
Trademark notices
EnergyAxis and IP AxisLink are trademarks and/or registered trademarks of Elster. Other names may be trademarks and/or
registered trademarks of their respective owners.