Magnum Dimensions ME-AGS-N User manual

Owner’s Manual Version
ME-AGS-N
Automatic Generator Start
for Network Versions

© 2016 Sensata Technologies i
Thank you from all of us at Sensata Technologies for purchasing
this ME-AGS-N (Auto Generator Start – Network) controller. The
ME-AGS-N is a product under the Magnum-Dimensions brand
from Sensata Technologies. We understand that you have many
purchasing options in the marketplace, and are pleased that you
have decided on this product. This AGS-N controller was proudly
assembled and tested in the United States.
At Sensata we are committed to providing you with quality products
and services. We hope your experience with us is positive.
Disclaimer of Liability
Since the use of this manual and the conditions or methods of
installation, operation, use and maintenance of the ME-AGS-N is
beyond the control of Sensata Technologies, this company does
not assume responsibility and expressly disclaims liability for loss,
damage or expense, whether direct, indirect, consequential or
incidental, arising out of or anyway connected with such installation,
operation, use, or maintenance.
Note as well that while every precaution has been taken to ensure
the accuracy of the contents of this manual, the speci¿cations
and product functionality may change without notice. Sensata
Technologies assumes no responsibility for errors or omissions.
Restrictions on Use
The ME-AGS-N may only be used in life-support devices or systems
with the express written approval of Sensata Technologies. Failure
of the ME-AGS-N can reasonably be expected to cause the failure
of that life-support device or system, or to affect the safety or
effectiveness of that device or system. If the ME-AGS-N fails, it is
reasonable to assume that the health of the user or other persons
may be endangered.
Copyright Notice
Copyright © 2016 by Sensata Technologies. All rights reserved.
Permission to copy, distribute, and/or modify this document is
prohibited without express written permission by Sensata.
Document Information
Description – ME-AGS-N Owner’s Manual
Part Number and Revision – 64-0039 Rev B
Date Published – March 2016
This manual is printed without color for cost savings. However, this
entire manual can be downloaded from our website (see below) with
many diagrams available in color.
Contact Information
Sensata Technologies
2211 West Casino Rd.
Everett, WA 98204
Phone: [phone], Fax: [phone]
Web: www.Magnum-Dimensions.com

ii © 2016 Sensata Technologies
IMPORTANT PRODUCT SAFETY INSTRUCTIONS
This manual contains safety instructions that must be followed during
the installation and operation of this product. Read all instructions
and safety information contained in this manual before proceeding.
Safety Symbols
To reduce the risk of electrical shock, ¿re, or other safety hazard, the
following safety symbols have been placed throughout this manual
to indicate dangerous and important safety instructions.
WARNING: Indicates that failure to take a speci¿ed action
could result in physical harm to the user.
CAUTION: This symbol indicates that failure to take a speci¿ed
action could result in damage to the equipment.
Info: This symbol indicates information that emphasizes or
supplements important points of the main text.
Product Safety Alerts
WARNING:
• All electrical work must be performed in accordance with
local, state, and federal electrical codes.
• This product is designed for indoor and compartment
installation. Do not expose to rain, snow, moisture, or
liquids of any type.
• Use insulated tools to reduce the chance of electrical
shock or accidental short circuits.
WARNING: Severe personal injury, death, and equipment
damage can result from operating the generator in a garage,
building, or con¿ned space. The generator produces dangerous
fumes when it is running. If the generator is installed in an
RV, disable the AGS system to prevent the generator from
starting when the RV is in a con¿ned space.
WARNING: ENGINE EXHAUST GASSES CAN BE DEADLY.
Install a reliable carbon monoxide alarm in your vehicle,
building, or home before starting a generator or enabling
the AGS. All engine exhaust contains carbon monoxide: an
odorless, colorless gas that can cause severe personal injury/
death. Symptoms of CO poisoning:
• dizziness, headache or throbbing temples,
• weakness or muscular twitching,
• sleepiness or confusion, and nausea or vomiting
If you experience any of the above symptoms, get to fresh
air immediately. If symptoms persist, seek medical attention.
Shut down the generator and do not operate until the unit is
inspected and repaired.
Product Safety Information

© 2016 Sensata Technologies iii
WARNING: With an AGS system installed, exhaust CO,
electrical shock, and moving parts hazards are possible due
to unexpected engine/generator starting. Disconnect the
engine/generator starting battery cables or AGS connection
to the engine/generator before working on the generator or
any other electrical system powered by it.
Battery Safety
• Remove all jewelry (such as rings, watches, bracelets, etc.)
when installing or performing maintenance on your batteries
and the inverter system.
• Always disconnect the batteries or energy source prior to
installing or performing maintenance on your batteries and
inverter system. Live power may be present at more than one
point since an inverter utilizes both batteries and AC. Turning
off the inverter may not reduce this risk. As long as AC power
is connected, it will pass through the inverter regardless of
the power switch on the inverter or the ON/OFF INVERTER
pushbutton on the remote/router.
• Wear eye protection such as safety glasses when working with
batteries.
• Never work alone. Always have someone near you when working
around batteries.
• Never use old or untested batteries. Check each battery’s label
for age, type, and date code to ensure all batteries are identical.
• Batteries are sensitive to changes in temperature. Always install
batteries in a stable environment.
Product Safety Information

iv © 2016 Sensata Technologies
Table of Contents
1.0 Introduction.............................................................1
1.1 AGS-N System Requirements..................................... 2
1.2 AGS-N Components.................................................. 2
1.3 ME-AGS-N Features.................................................. 3
2.0 Installation ..............................................................4
2.1 Installation Requirements.......................................... 4
2.2 Required Materials/Tools (not included)....................... 6
2.3 Mounting Procedure.................................................. 6
2.4 Connecting the Supplied Cables to the AGS-N.............. 7
2.4.1 Remote Temp Sensor Cable....................................... 7
2.4.2 Network Communications Cable................................. 7
2.5 Connecting the AGS-N to an Inverter.......................... 8
2.5.1 Cable Connections with Multiple Devices...................... 9
2.6 Connecting the AGS-N to a Generator........................10
2.6.1 Power Connections (Terminals 3 & 4).........................11
2.6.2 Generator Run Sense Connection (Terminals 2 & 4) .....11
2.6.3 Gen Start/Stop Connections (Terminals 1, 5, 6, 7, & 8).........14
2.6.4 Common Generator Wiring Diagrams.........................15
2.7 Warning Label ........................................................16
3.0 AGS-N Controller Setup..........................................21
3.1 Con¿guring the Internal AGS-N Settings.....................21
4.0 AGS-N Functional Operation...................................23
4.1 AGS Power-Up Test .................................................23
4.2 Generator Wiring Test..............................................23
4.3 AGS-N Controller LED Indicators ...............................24
4.3.1 STATUS LED Indicator..............................................24
4.3.2 READY LED Indicator...............................................24
5.0 AGS-N Controller Troubleshooting..........................25
5.1 Using the AGS-N’s LED Indicators..............................25
5.2 Generator Starting/Running Troubleshooting...............26
5.2.1 If the Generator does not Start or Run.......................26
5.2.2 If the STATUS LED does not go Solid..........................26
6.0 Appendix................................................................29
6.1 Other Accessories and Equipment..............................29
6.1.1 Optional Accessories for the AGS-N ...........................29
6.2 AGS Revisions and Inverter Compatibility...................29
Limited Warranty ..............................................................30
How to Receive Repair Service.............................................31

© 2016 Sensata Technologies v
List of Figures
Figure 1-1, Components of the AGS-N Controller ....................... 3
Figure 2-1, AGS-N System Diagram ......................................... 5
Figure 2-2, AGS-N Dimensions ................................................ 6
Figure 2-3, Remote Temp Sensor Connection ............................ 7
Figure 2-4, Network Communication Cable................................ 7
Figure 2-5, Connecting an AGS to an Inverter (Small) ................ 8
Figure 2-6, Connecting an AGS to an Inverter (Large) ................ 8
Figure 2-7, Multiple Network Devices – Star.............................. 9
Figure 2-8, Multiple Network Devices – Daisy Chain ................... 9
Figure 2-9, Connected Devices at the Same Potential ................10
Figure 2-10, Generator Run Sense Options...............................13
Figure 2-11, Wiring to the AGS-N’s Terminal Block ....................15
Figure 2-12, Warning Label....................................................16
Figure 2-13, Two-wire Control ................................................17
Figure 2-14, Three-wire Momentary Control.............................18
Figure 2-15, Three-wire Maintain Control.................................19
Figure 2-16, Three-wire Momentary Control (with Preheat) ........20
Figure 3-1, Inside the AGS-N Controller...................................21
Figure 4-1, AGS–N Front Panel Controls and Indicators..............24
List of Tables
Table 3-1, Gen Type Settings..................................................22
Table 5-1, AGS-N Controller Troubleshooting Guide ...................25

1 © 2016 Sensata Technologies
Introduction
1.0 Introduction
Congratulations on purchasing the ME-AGS-N. This is the ‘network’
version of a Magnum Automatic Generator Start (AGS) controller,
and is set up/operated via a Magnum inverter and remote control
(e.g., ME-RC, ME-ARC, or ME-RTR).
Info: If you need an AGS, but are not using a Magnum inverter/
charger, use the ME-AGS-S (AGS – Standalone).
Using the ME-AGS-N (and depending on your particular remote),
your generator can be set up to automatically start and stop based
on the following conditions:
• Battery Voltage – By monitoring battery voltage, the AGS
autostarts the generator when battery voltage falls to a certain
level, and autostops the generator when battery voltage either
rises to a higher level or goes into the Float charge stage—
depending on the remote control.
• Time of Day – Starts/stops the generator daily based on
selected start/stop times (per the remote control’s clock).
• Inverter Load Amps – Starts and stops the generator based
on the loads powered by the inverter (assists with larger loads).
Note: Only applicable to MSH and MS-PAE Series inverters.
• Battery SOC – Monitors your battery system and automatically
starts the generator when the battery requires charging—based
on the actual SOC (State of Charge) of the battery.
Note: Battery SOC is a more accurate method than using battery
voltage as a criteria to determine when a battery requires charging.
• Rising Temperature – Continuously monitors the temperature
of the surrounding area, and automatically starts the generator
whenever power is needed to run an AC or to cool down an area.
Info: The Battery SOC autostart/autostop feature requires an
installed, optional ME-BMK or ME-BMK-NS (Battery Monitor
Kit) accessory to determine the battery’s SOC.
The AGS-N is also equipped with the following operational features:
• Allows manual on/off control (ME-ARC and ME-RTR only) and
automatic control of the generator
• Compatible with 12, 24, or 48-volt systems
• Adjustable settings made easy using the remote’s AGS menus
(e.g., ME-RC, ME-ARC, or ME-RTR)
• Quiet Time setting prevents generator operation at night
• TEST button that con¿rms if installation wiring is correct
• Removable 8-port terminal block for easy wiring/powering down
• Front panel LED indicators for gen start/stop status and faults

© 2016 Sensata Technologies 2
Introduction
Generator Compatibility
The AGS is compatible with most AC or DC generators with either
2-wire or 3-wire start controls, such as: Onan, Generac, Martin,
Kohler, Honda, Yamaha, and many others. A list of generators that
have been successfully used with the AGS (and their respective
wiring diagrams) can be found at: www.Magnum-Dimensions.com.
1.1 AGS-N System Requirements
The AGS requires several other components to operate correctly.
• Generator (automatic start): The generator should have
automatic starting capability. The generator must have start
and stop controls [e.g., electric starter and electric choke (for
gasoline units)], and safety sensors to autostart/autostop
the generator should the following conditions occur: low oil
pressure, high temperature, engine start over-crank, over/
under frequency (speed), low coolant level, etc. The generator
should also supply a generator run signal, which the AGS uses
to detect if the generator is running. The generator run signal
must be from 10 to 40 volts DC, and can be provided from a
generator hour meter signal or a switched B+ terminal.
Info: A generator run signal is not required when using
Gen Type: 2-Wire Standby Mode and an AGS with a revision
of 5.2 or higher.
• Remote Control: A separate remote control (e.g., ME-RC,
ME-ARC, or ME-RTR) is required to con¿gure the AGS and to
monitor any generator starting and stopping activity. Some
advanced generator start/stop features are not available on the
standard ME-RC and require the ME-ARC or ME-RTR advanced
controllers. Refer to your remote owner’s manual to determine
the available AGS autostart and autostop features.
• Inverter: A network-capable inverter is required in order to
communicate network information from the remote control to
the AGS-N. The inverter must also have the internal software
to work with the remote and to allow the desired AGS features.
1.2 AGS-N Components
The ME-AGS-N is shipped with the following:
• ME-AGS-N controller • 10’ Network comm cable
• 60’ Remote temp sensor cable • #8 x ¾”mounting screws (x4)
• Warning label • ME-AGS-N Owner’s Manual

3 © 2016 Sensata Technologies
Introduction
1
2
3
6 7
5
8
4
Figure 1-1, Components of the AGS-N Controller
STATUS Indicator: a bi-color (green or red) LED indicator
that illuminates to provide information on the AGS’s
operation.
TEST Button: a momentary pushbutton that allows the
AGS system to be tested for correct wiring and generator
start/stop operation.
Wiring Terminal Block: an 8-port friction-¿t connector
that powers the AGS and connects the generator’s start/
stop and run sense wires.
Mounting Flange: used to secure the AGS to a shelf or a
wall. Four black oxide #8 x 3/4 Phillips, pan head screws are
provided to mount the AGS.
READY Indicator: a green LED indicator that illuminates to
signal that the AGS is powered (Àashes if the optional temp
sensor is not connected).
NETWORK Connection Port (green label): a RJ14 port
(6P6C – 6-position, 6-contact female connection) that
provides the connection point for the network communication
cable.
REMOTE Connection Port (purple label): a RJ14 port
(6P6C – 6-position, 6-contact female connection) that
provides the connection point for the remote temp sensor
cable (Figure 2-3).
Internal Access Screws: four #6-32 x 3/8 Phillips screws
that must be removed to access the DC Input Jumper and
the 4-position DIP Switch.
5
6
7
4
3
2
1
8
1.3 ME-AGS-N Features
The AGS module provides the generator’s wiring connections and
the following components (refer to Figure 1-1):

© 2016 Sensata Technologies 4
Installation
2.0 Installation
Installing the AGS is a simple process. Before installing, review the
Important Product Safety Instructions on page ii of this manual and
read the section below to ensure the overall system requirements
are met. To assist you in planning and designing your installation,
review the basic system diagram shown in Figure 2-1.
WARNING: The AGS is not ignition-protected and should
not be installed in a location that requires ignition-protected
equipment. To prevent ¿re or explosion, do not install the AGS
controller in any area with extremely Àammable liquids like
gasoline or propane, or in an area that contains connections
between components of a fuel system.
CAUTION: Installations should be performed by quali¿ed
personnel, such as a licensed or certi¿ed electrician. It is the
installer’s responsibility to determine which safety codes apply
and to ensure that all applicable installation requirements
are followed.
2.1 Installation Requirements
Review these requirements prior to performing the installation.
• For the AGS to automatically start and stop the generator
properly, the generator must include an electric start and an
automatic choke. To prevent generator damage and to ensure
reliableoperation,usegeneratormodelsdesigned for unattended
operation. These models should also be equipped with remote
operation connections and have protective systems that shut
down the generator when low oil pressure, over-temperature,
starter lockout, or over-crank conditions occur.
• TheAGSisconnectedtotheinverterbya10-footcommunications
cable. Before installing/connecting any wires, ¿rst determine:
1) communications cable route throughout the home/vehicle/
boat from the AGS controller to the inverter, 2) the start/stop
signal wire route from the AGS to the generator, and 3) the wire
route from the AGS controller to the monitored battery bank.
• Always check for existing electrical, plumbing, or other areas of
potential damage BEFORE drilling or cutting into walls.
• If installing the AGS in a boat, RV or truck, ensure the conductors
passing through walls, bulkheads, or other structural members
are protected to minimize insulation damage such as cha¿ng,
which can be caused by vibration or constant rubbing.
• DonotmounttheAGScontrollerinaclosedbatterycompartment,
or in an area where water (any liquid) can enter the AGS and
cause shorting or corrosion.
• The AGS, if possible, should be wired so as not to interfere with
the manual start/stop switches on your generator, or with your
air conditioner controls if the high temp start feature is used to
power the air conditioner.

5 © 2016 Sensata Technologies
Installation
Generator
run signal
Generator
start/stop
wiring
Gen
Battery
Monitored Battery
Bank*
-
+
+
Battery bank’s
negative and
generator
battery’s negative
must be connected
ME-AGS-N
Inverting
DC 12.6V 5A
SE LECT
TECH
AGS MET ER SET UPSHOREINV E R T ER
CHARGER
INV
CH G
FAULT
PWR
ON/OFF
ON/OFF
Magnum inverter
Magnum remote
+
* Normally the inverter’s
battery bank
Battery voltage
(12v/24v/48v)
+
Figure 2-1, AGS-N System Diagram

© 2016 Sensata Technologies 6
Installation
2.2 Required Materials/Tools (not included)
To properly install the AGS, you need to supply the following:
Required Materials
• #16 to #12 AWG (1.31 to 3.31 mm2) wire for connecting the
AGS to the generator start/stop circuit and to the battery bank
• In-line fuse holders (with a 5-amp DC fuse)
Required Tools
• Phillips screwdriver (#2) • DC voltmeter • Drill
• Flat-blade (1/8”) screwdriver • Cut-out tool • Pencil
• Drill bits (7/64” & 1/8”)
2.3 Mounting Procedure
Select an inside mounting location that is clean, dry, and protected
from extreme temperatures
. Figure 2-2 shows the AGS’s dimensions.
Remove the 8-port terminal block from the AGS (Figure 1-1, Item
3). Remove the terminal by pulling it straight out.
Info: The AGS controller can be mounted in any direction. Be
sure to allow ample room to
access the 8-port terminal block,
and the NETWORK and REMOTE connection ports
.
Note: Do not plug the terminal block back into the AGS controller until
the installation is complete and you are ready to perform the functional
operation tests (see directions in Section 4.0).
• Mount the AGS using the four supplied #8 x 3/4” screws.
1
4
1"
3
16"
2" (50.8 mm)
2"(70.5 mm)
3
4
3
8"
(9.8 mm)
~
3
8"
(9.8 mm)
~
4"(106.4 mm)
16
3
4"(124.5 mm)
8
7
~(4.1 mm) 5"(137.2 mm)
8
3
(31.7 mm)
3 " (82.5 mm)
3 " (90.5 mm)
4
1
16
9
Figure 2-2, AGS-N Dimensions

7 © 2016 Sensata Technologies
Installation
2.4 Connecting the Supplied Cables to the AGS-N
The AGS comes with two cables. The remote temp sensor cable is
required if using the temperature autostart feature, the network
communication cable is required for communicating with the
inverter/remote.
2.4.1 Remote Temp Sensor Cable
If using the temp autostart feature, connect the plug-in end of the
temp sensor cable to the REMOTE (purple) port of the AGS controller,
and then place the other end (with sensor) in the area you wish to
monitor (see Figure 2-3). The temp sensor cable is 60 ft long.
If you are not using the temperature autostart feature, the temp
sensor cable does not need to be connected.
Note: The AGS’s READY light Àashes if the temp sensor cable is not
connected—this is normal.
Figure 2-4, Network Communication Cable
12341234
TAB
TAB
same color
same
color
4-conductor
telephone-type
opposite colors from
top to bottom
(tabs face toward you)
ME-AGS-N
60' Remote
Temp Sensor
cable
Figure 2-3, Remote Temp Sensor Connection
2.4.2 Network Communications Cable
The network communications cable is a 10-foot, 4-conductor, Àat,
telephony standard with 6P4C (6-position/4-conductor) connectors
on each end. When the 6P4C connectors are held side by side with
both of the connector tabs facing the same way, the color of the
conductors in each connector is the opposite from top to bottom (as
shown in Figure 2-4).
Note: The network communication cable can be extended up to a length
of 200 feet without data degradation.

© 2016 Sensata Technologies 8
Installation
Figure 2-6, Connecting an AGS to an Inverter (Large)
Large Magnum inverter
ME-AGS-N
Remote
Figure 2-5, Connecting an AGS to an Inverter (Small)
Remote
ME-AGS-N
Small Magnum inverter
2.5 Connecting the AGS-N to an Inverter
• Small inverter (MM/MMS Series) – Connect one end of the
communications cable to the AGS’s RJ14 NETWORK (green)
port. Connect the other end of the communications cable to
a phone splitter, and then connect the splitter to the Remote
(blue) port on the inverter (see Figure 2-5).
• Large inverter (ME, RD, MS, MSH, MS-PE, MS-PAE Series)
– Connect one end of the communications cable to the AGS’s
RJ14 NETWORK (green) port. Connect the other end of the
communications cable to the RJ14 Network port (green) on the
large inverter (see Figure 2-6).
Phone Splitter
Connects AGS network cable
(from AGS’s green NETWORK
port) and remote cable to
inverter’s REMOTE (blue) port
Network cable from AGS
NETWORK (green) port to
inverter’s Network (green) port
Remote cable to
inverter’s Remote
(blue) port

9 © 2016 Sensata Technologies
Installation
• Daisy Chain Configuration – Network devices are linked in a
series (Figure 2-8). If using this con¿guration, the ME-AGS-N
must be the ¿rst device connected to the inverter’s Magnum Net
or Network port—followed by the second network device.
Figure 2-7, Multiple Network Devices – Star Configuration
Figure 2-8, Multiple Network Devices – Daisy Chain Configuration
2.5.1 Cable Connections with Multiple Devices
If using more than one networked device, a 4-wire phone splitter is
required to connect the devices. Star or Daisy Chain con¿gurations
are the two options for interconnecting the devices.
Info: Before deciding on which con¿guration to use, review
the differences in installation and ease of troubleshooting.
• Star Configuration – All the network devices connect to the
inverter’s Network port via a phone splitter—using individual
cable runs (Figure 2-7). Since each device is independently
connected to the inverter’s MagNet or Network port, problems
in a cable or a device can be easily isolated; and, if there is a
cable failure to one device it does not bring down all the devices.
ME-BMK
Remote Control
ME-AGS-N
Magnum Inverter/Charger
Phone splitter
SE LECT
TECH
AGS METER S ET UPSHOREINV E R T ER
CHARGER
INV
CH G
FAULT
PWR
ON/OFF
ON/OFF
ME-AGS-N (1st device)
Remote Control
Magnum Inverter/Charger
Phone
splitter
ME-BMK (2nd device)
SELECT
TECH
AGS METER SETUPSHOREINVERTER
CHARGER
INV
CHG
FAULT
PWR
ON/OFF
ON/OFF

© 2016 Sensata Technologies 10
Installation
2.6 Connecting the AGS-N to a Generator
With the AGS already mounted, ensure the 8-port terminal block is
removed before proceeding with wiring the generator. Use the info
in this section to wire the AGS’s terminal block to the generator.
CAUTION: DO NOT plug in the 8-port terminal block until all
the wiring to the AGS controller is complete and you are ready
to perform the functional operation tests (Section 4.0).
CAUTION: You must use a fuse rated at 5 amps to protect all
power circuits connected to the AGS (do not fuse the negative
connection on Terminal #4). Ensure the fuse is correctly rated
for the wire size used. Refer to national/local codes for rating
and type. Normally, a minimum #16 AWG (1.31 mm2) wire
is required in order to use a 5-amp fuse.
Info: The green 8-port terminal block accepts CU/AL
conductors from #30 to #12 AWG (0.05 to 3.31 mm2).
Figure 2-9, Connected Devices at the Same Potential
2.5.1.1 Negative Connections
When connecting devices together (via a network communications
cable), the return path (i.e., battery negative) of each battery
powered device must be at the same potential (i.e., electrically
common with each other—see Figure 2-9). This prevents a high-
impedance path developing between the connected devices, which
can cause the network cable to become the DC return path to the
battery—possibly resulting in permanent damage to all connected
devices on the network. This also requires that the battery negative
connection of each device be always connected before connecting/
disconnecting any battery positive.
Network
cable
Inverter
Battery
Inverter
Battery
AGS Inverter

11 © 2016 Sensata Technologies
Installation
To connect the monitored battery bank to the AGS:
1. Route and connect a wire (black) from the monitored battery
bank’s negative terminal to Terminal 4 on the AGS.
2. Route and connect a wire (red) with a 5-amp in-line fuse from
the monitored battery bank’s positive terminal to Terminal 3.
2.6.2 Generator Run Sense Connection (Terminals 2 & 4)
A gen run sense signal/voltage is required as it alerts the AGS that
the generator is running; which prevents another starter crank to
the generator. If the gen run sense signal is not provided to the
AGS, the AGS commands the generator to autostop (in case the gen
is running), and then attempts another autostart sequence (up to
four start attempts before a gen start fault occurs). The Gen Type
switch setting (under Section 3.1) determines the required gen run
sense signal/voltage that must be provided to the AGS.
• Gen Type is 2-Wire Standby Mode* – A fully automatic
generator (can start, run and stop using only two wires) may be
able to use the 2-Wire Standby setting (see Gen Type settings
in Section 3.1). When using this setting, the gen run sense
signal is communicated from the inverter to the AGS through
the network cable. The AGS determines that the generator is
running when the inverter/charger communicates that it is in a
charge state (e.g., Charging, Bulk Charge, Absorb Charge).
When using the 2-Wire Standby setting (and generator is
autostarted by AGS), the generator runs and connects to the
input of the inverter. This causes the inverter to begin charging,
which in turn communicates to the AGS (via the network cable)
that the generator is running—preventing another starter crank.
*Requires ME-AGS-N with Rev 5.2 to use 2-Wire Standby mode.
Info: The AGS requires a DC input of 8.5 to 70 volts in order
to operate the internal relays (>70 volts causes damage to
the AGS and is not covered by the product warranty).
2.6.1 Power Connections (Terminals 3 & 4)
Terminal 3 (+) and Terminal 4 (–) on the 8-port terminal block are
connected to the monitored battery bank*. These terminals power
the AGS controller and monitor the inverter’s battery voltage (when
used to autostart the generator based on low battery voltage).
*Monitored Battery Bank – When autostarting the generator based on
battery voltage (e.g., start volts), the inverter’s battery bank must be
connected to Terminal 3 (+) and Terminal 4 (–). If autostarting based
on any other condition (e.g., temperature, amps), either the inverter
battery bank or the generator’s battery may be used to power the AGS
controller. However, the negative terminal of every battery bank must
be connected together to prevent damage to the AGS (refer back to
Section 2.5.1.1).

© 2016 Sensata Technologies 12
Installation
• Gen Type is not 2-Wire Standby Mode – For all other Gen
Type settings (other than 2-Wire Standby mode), the generator
run sense must be 10 to 40 VDC—only while the generator
is running. The gen run sense voltage from the generator is
connected to Terminal 2 (positive) and Terminal 4 (negative)
on the green 8-port terminal block on the AGS; and can be a
switched B+ source from the generator, a positive signal from
the generator’s hour meter, or the generator’s running light.
To install the generator’s run sense voltage to the AGS:
1. Connect a wire (preferably not black or red) from the generator’s
run sense output to Terminal 2 on the 8-port terminal block.
2. Connect the negative terminal of the monitored battery bank to
Terminal 4 (power negative) on the 8-port terminal block. Ensure
the negative terminal on the generator battery is referenced/
connected to the negative terminal on the monitored battery.
Info: The negative terminal of the monitored battery bank
must be in common with the negative side of the gen run
sense signal from the generator. This ensures that the positive
battery voltage (to Terminal 3) and the positive gen run sense
voltage (to Terminal 2) have a common negative reference (to
Terminal 4), and are correctly sensed/measured by the AGS.

13 © 2016 Sensata Technologies
Installation
Option 3 – Use an external 120 VAC coiled relay to bring the
generator’s battery voltage to the AGS gen run sense terminal
(Terminal #2) only when the generator is running. The generator’s
battery voltage must be 10 to 40 VDC.
Figure 2-10, Generator Run Sense Options
120VAC Coil Relay On Generator
NC
COM
NEUHOT
NO
120VAC Outlet
Inside Generator
Generator
Battery
run sense
AGSTerminalBlock Ports:
1 2 3 4 5 67 8
DC Fuse
(5A max)
Generator
Battery
Inside Generator
Generator
Running Lamp
OR
Generator
Hour Meter
0123
negative
DC Fuse
(5A max)
run sense
AGSTerminalBlock Ports:
1 2 3 4 5 67 8
negative
DC Fuse
(5A max)
run sense
AGSTerminalBlock Ports:
1 2 3 4 5 67 8
On Generator
120VAC Outlet
120VAC IN
12VDC OUT
TRANSFORMER
negative
Option 2 – Use a 120 VAC to 12 VDC step-down transformer
(normally used to charge power equipment batteries) and plug
into the generator’s 120 VAC output. The step-down transformer
provides 12 VDC output only while the generator is running.
What if my generator does not have a gen run sense output?
Review the alternative options (Figure 2-10) to provide this gen run
sense voltage to the AGS.
Option 1 – Tap into the positive side of the generator’s hour meter
or running light; ensure the voltage is only 10-40 VDC while the
generator is running.

© 2016 Sensata Technologies 14
Installation
2.6.3 Gen Start/Stop Connections (Terminals 1, 5, 6, 7, & 8)
This section covers the control relays inside the AGS controller, and
provides information about wiring these relays to the generator’s
start/stop circuit. You must identify the generator’s start and stop
wiring requirements in order to determine: how many relays you
require, the number of wires you connect, and in what combination.
When the generator is equipped with a remote control terminal or
connector, it is much easier to make the connections to the AGS
control relays if the generator’s optional remote control is purchased.
Connecting to the generator’s remote also eliminates the need to
make connections inside the generator (and possibly violating the
generator’s warranty).
The AGS controller provides three control relays (RY1, RY2, and
RY3) to operate the autostart/autostop functions of your generator.
These relays are dry contacts (they do not provide any voltage or
current), and operate only as switches that turn low amperage
devices (5 amps) on and off. They are not intended to directly
provide power to starter motors or to ignition systems. Rather, the
relays are used to send a signal to operate the coil of another higher
amperage device, which does the actual switching of power.
CAUTION: A fuse rated at 5 amps or less must be used to
protect each of the relays. The warranty does not cover
damage to these relays. Fuses should be located as close
as possible to the generator connection. A fuse must be
used, even if the circuit is providing only a “dry contact” or
“ground” connection—it will prevent damage if the connection
is miswired or damaged.
Info: To set the generator type—which determines the
operation of the AGS relays—see the Gen Type setting info
in Section 3.1.
Info: Due to the different generator types and the various
starting/stopping wiring con¿gurations used by generator
manufacturers, detailed wiring instructions are not provided
in this manual. Please refer to your generator’s documentation
for wiring details.
Info:Formoreinformation—andtoviewdiagramsonconnecting
the AGS to the start/stop circuit on many generators—go to
www.Magnum-Dimensions.com.
Depending on your generator’s start and stop wiring requirements,
you may only need to use one relay (RY1) for fully automatic 2-wire
generators; two relays (RY1 and RY2) for 3-wire generators; or
all three relays (RY1, RY2, RY3) for generators that require an
independent bypass or preheat circuit.