Mercury Messenger Modem User manual

Messenger Modem®
Page 1
Single-Channel, 2400 Baud, Low-Power Modem
Messenger V4.0 Modem®
User Guide
V 2.06
January 2009
P513.272.1111 3940 Virginia Avenue, Cincinnati, OH 45227 USA
F 513.272.0211 www.mercuryinstruments.com www.rmg.com

Messenger Modem®
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Messenger Modem®
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TABLE OF CONTENTS
FCC Part 68......................................................................................................................
CS-93 Notice.....................................................................................................................
Telcom Requirements.......................................................................................................
Limited Warranty..............................................................................................................
Battery Warning...............................................................................................................
Description........................................................................................................................
Board Layout....................................................................................................................
Parts Identification...........................................................................................................
MMX, Sentry, ERX & Pulse Accumulator
DIP Switch Settings- internal modem w/o external case connector...............................
DIP Switch Settings- internal modem with pass-thru case connector............................
DIP Switch Settings- w/ CMOS converter board and shortingplug...............................
DIP Switch Settings- w/ CMOS converter board ..........................................................
Mini-AT
DIP Switch Settings- internal modem connected to TB2...............................................
DIP Switch Settings- internal modem connected to J6..................................................
ER
DIP Switch Settings- internal modem connected to TB1...............................................
ECAT
DIP Switch Settings- internal modem connected to SCIB.............................................
Verification (via MasterLink)..........................................................................................
Need Help ? .....................................................................................................................
Technical Support.............................................................................................................
AppendixA - Basic Telephone Line Information...........................................................
Appendix B - Basic Telephone Line Troubleshooting...................................................
Appendix C - Modem Configuration Software................................................................
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5
5
6
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7
8
9
10
12
14
16
18
20
22
24
26
27
28
31
39
43

Messenger Modem®
Page 4
FCC PART 68
TheMessengerModemisregisteredwiththeFCC(FederalCommunicationsCommission)underPart68. ThePart
68 rules require that the following information be provided to the end user of equipment containing a DAA:
FCC Notice to the Users
1. UPON REQUEST ONLY, you must provide the following data to your telephone utility company
(telco):
a) Notice of intention to install or permanently remove an FCC Part 68 registered device or system,
and the *FCC Registration Number.
b) *The Ringer Equivalence Number (REN) (see device label). Note that if several devices are
connected to the same line, the RENs must not add up to more than 5.0 (A or B). This REN
figureis important to your telco.
c) *The (USOC) jack type to be provided by the telco. Typically this will be RJ-11 C/W for single
lines.
*The *-flagged items above are noted on the equipment's FCC Compliance label.
2. This device may not be used on telco-operated coin phone lines. Party lines and privately owned coin-
phones are subject to local State regulatory policies, and possible additional State special require-
ments.
3. The telco has the right to make changes to their network which may affect the operation of your
equipment, provided you are given adequate advance written notice to permit correct operation.
4. In case of operational problems, disconnect your unit by removing the modular plug from the telco
jack. If your regular phone (or other device or system) still works properly, your Mercury Modem
has a problem and must remain disconnected and (officially) serviced or returned for repairs. If upon
the above disconnection your regular service still has problems, notify your telco that they may have
a problem. Request prompt service at no cost to you the user. If a problem is found in premises wiring
not telco-installed wiring, you may be subject to a service call charge.
5. Unless otherwise noted in the User's Manual (e.g.: fuses, etc.), user may not under any circumstances
(in or out of warranty) attempt any service, adjustments or repairs on this unit. It must be returned
to the factory or authorized U.S. service agency for all such work. Locations (or phone numbers) of
factory or authorized U.S. service points are listed in this user's manual.
6. Special FCC rules apply to equipment connected behind a PBX or KTS.

Messenger Modem®
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CS-03
NOTICE: TheIndustry Canada labelidentifies certified equipment. This certification means that the equipment
meetstelecommunicationsnetworkprotective,operationalandsafetyrequirementsasprescribedintheappropriate
TerminalEquipmentTechnicalRequirements document(s). The Departmentdoesnotguaranteetheequipmentwill
operate to the user's satisfaction.
Beforeinstallingthisequipment,usersshouldensurethatitispermissibletobeconnected to the facilities of the local
telecommunicationscompany. Theequipment mustalsobeinstalledusingan acceptablemethodofconnection. The
customershouldbeawarethat compliance with theaboveconditionsmaynotpreventdegradationofservicein some
situations.
Repairs to certified equipment should be coordinated by a representative designated by the supplier. Any repairs
or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications
company cause to request the user to disconnect the equipment.
Usersshould ensure for their ownprotection that the electrical ground connections of the power utility, telephone
linesandinternalmetallicwaterpipesystem,ifpresent,areconnectedtogether. Thisprecautionmay be particularly
importantin rural areas.
Caution:Usersshouldnotattempt to make such connections themselves, butshouldcontacttheappropriateelectric
inspectionauthority, or electrician,as appropriate.
Telecom Requirements
TheMessengerModemdoesnot fully meet telecom's impedance requirements. Performancelimitationsmayoccur
whenusedin conjunction with some partsofthenetwork. Telecom will accept noresponsibilityshoulddifficulties
ariseinsuch circumstances.
Thetransmitlevelfromthe Messenger Modem is set at afixedlevelandbecauseofthis, there may be circumstances
where the device does not give its optimum performance. Before reporting such occurrences as faults, check the
line with a standard telephone. Do not report a fault unless the telephone performance is impaired
NOTICE:
TheRingerEquivalenceNumber(REN)assigned to each device provides anindicationofthemaximumnumber
of terminals allowed to be connected to a telephone interface. The termination on an interface may consist of any
combinationof devices subject only to the requirementthat the sum of theRinger Equivalence Numbers of allthe
devices does not exceed 5. The Messenger Modem REN is 0.3A.

Messenger Modem®
Page 6
Limited Warranty
Mercury Instruments, warrants The Messenger Modem covered by this manual to be free from de-
fects in material and workmanship under normal use and service of this product. If returned to our
factory, transportation charges prepaid, within 4 years of the original purchase shipment date, Mer-
cury Instruments agrees to repair or replace any parts which its examination reveals to have been
defective due to faulty workmanship or material. All obligations or liabilities on Mercury Instruments
part is to repair or replace warranty instruments, and does not include any other type of claims or
damages, including but not limited to consequential damages following the use or misuse of instru-
ments sold by it. Mercury Instruments reserves the right at any time make to changes, modification
or enhancements to this product without prior notification. This warranty is in lieu of all other warran-
ties, express or implied. No agent is authorized to assume for Mercury Instruments any liability
except as set forth above.
Intrinsic Safety
The Mercury Instruments Messenger Modem is listed by CSA (CUS) for Class I, Div-2, Group D and
Class I, Zone 2, Group IIA hazardous locations when installed in accordance with CSA (CUS) control
drawings.
Line Sharing Note
The messenger modem has been tested for its performance in yielding the phone line when
another phone is picked up. The messenger modem typically surrenders the line in less time than
it takes a telephone handset to reach your ear. The user has to understand that if he does not hear
a dial tone when he picks up the phone, the modem sharing the line was on the line at that mo-
ment. The modem will hang up because he picked up the phone. The telephone company will
not see the modem hang up because another phone has been picked up at the same
time, so it will not provide a new dial tone. All the user has to do is to hang up the phone briefly
and pick it up again and listen for a dial tone. In rare instances, such as when pulse dialing is
used, he may have to repeat the process. (Pulse dialing is like hanging up and picking up the
phone rapidly, so a second phone being picked up cannot be detected until the pulse dialing
ends.)
Battery Warning
Use only Mercury Instruments manufactured battery packs with part numbers as specified on the
certification label or control drawing. Use of third party battery packs voids product warranty, voids
intrinsic safety certifications and may impair safety.

Messenger Modem®
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Description
The Mercury Instruments Messenger Modem is a single channel, battery-operated, 1200/
2400 baud, analog modem designed for the harsh environments of the natural gas industry.
The modem board may be ordered with or retrofitted to existing Mini-AT, Mini-Max,
ECAT, ER, Sentry and ERX instruments. The modem is also included as an integral part
of a standard Mercury Pulse Accumulator. Since the Messenger Modem requires very
little power, it shares power from the instrument’s battery pack. Instruments connected to
a Messenger Modem may be called by host computer software (usually MasterLink or
AutoLink) to remotely retrieve data, or the modem can call into host computer systems
that can answer and process incoming calls, such as Alarm-Link.
The Messenger Modem can also be installed into a separate enclosure as a stand-alone
modem assembly. Modem assemblies may also include safety barriers for pulse data,
serial data and/or instrument power. Various power supply options are available for the
modem assemblies and include; alkaline or lithium batteries, AC power and solar panels.
On-board DIP switches provide local configuration of various parameters, such as;
•Select carrier speed: 1200 or 2400 baud
•Enable or Disable: Line Share/Line Surrender
•Enable or Disable: Answer Incoming Calls/Do Not Answer
•Enable or Disable: Wake-up on 1 Ring/ Wake-up on User Defined Rings
•Enable or Disable: Wake-up on Serial Data/Do Not Wake-up
•Enable or Disable: Modem Configuration/Serial Pass thru
•Select serial mode: RS-232 or CMOS
In addition, the S-Registers may be modified via the use of the Mercury Messenger Con-
figuration Software.

Messenger Modem
Board Layout
(P/N 40-3000)
Page 8
2
7
13456
RING
RXD
PWR
OH
DCD
TXD
LED
Indicators:
1Status LEDs (6 total) Top to Bottom:
LED#1 - "RING", Ring
LED#2 - "RXD", Receive Data
LED#3 - "PWR", Power
LED#4 - "OH", Off Hook
LED#5 - "DCD", Carrier Detected
LED#6 - "TXD", Transmit Data

Messenger Modem Board
Parts Identification
2 Switch Configuration, from Top to Bottom (8 total):
(Note: OFF position is toward edge of board)
Switch Positions
OFF ON
Sw#1 - Baud Rate, 1200 2400
Sw#2 - Line Share / Line Surrender enable disable
Sw#3 - Answer Incoming Calls enable disable
Sw#4 - Wake-up on 1 Ring S0 Rings (default 9)
Sw#5 - Wake-up on Serial Data, enable disable
Sw#6 - Unused
Sw#7 - Configuration Mode enabled disable
Sw#8 - Serial Data Mode, RS-232 CMOS
When Switch 4 is set to ‘On’ the number of rings the modem will wake on is controlled
by the value of S0. The default value for S0 is 9, but it may be easily changed using the
Messenger Modem Configuration Software (see Appendix C)
When Switch 7 is set to “Off” the unit will go into configuration mode until the switch is
changed back or 10 minutes has passed. If the unit timed out with the switch in the
“Off” position it will automatically disable the configuration mode. To put the unit back
into conguration mode it is necessary to Move switch 7 to “ON”, Wake the Modem, and
move switch 7 back to the “Off” position.
Page 9
3JP3 - Connector (2x5-pins) for CMOS-level serial data
from any of the Mini-Max family of main boards
4JP2 - Connector (6-pins) sometimes used as a power
connection to the modem board
5TB1 - Terminal Strip (5-lug) connections,
(assigned functions, left to right:)
+DC COM TXD RXD COM
6J2 - Connector (RJ-11) telephone line connection
7 JP4 - Connector (8 pin) RS232 Communication and Configuration

Messenger Modem®
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Messenger Modem DIP Switch Settings
1200 Baud
Enable Line Share
Enabled Ring Detect
Wake up on 1 Ring
Enable Wake-up on RS-232
Always On
Configuration Mode
RS-232 Mode
2400 Baud
Disable Line Share
Disable Ring Detect
Wake up on User Defined # of Rings
Disable Wake-up on RS-232
Serial Pass thru
CMOS Mode (w/ internal ribbon cable)
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
Off On
Switch settings for:
Mini-Max, including Sentry, ERX and Pulse Accumulator
(Except with use of external serial connector)
Notes: a) The Disable Ring Detect feature is available starting with the version-3 board w/ firmware 2.14.
b) Set switches 2, 3, 4 & 7 according to individual site requirements.
After a switch position is changed, remove power for 10 seconds
(Set Baud Rate switch to 1200 baud for analog cellular operation)
(Note: DIP Switch as viewed when RJ11 connector is at bottom-right of board)

Messenger Modem®
Page 11
Messenger Modem Wiring Diagram
internal modem, w/o external case connector
for:
Mini-Max, Mini-Max AT, Mini-Max ATX, Sentry, Sentry X, ERX and Pulse Accumulator
J3 J4
J5
JP3
TB1
J2
Messenger Modem Board p/n 40-3000
Mini-Max Board p/n 40-2572-xx
Power Disconnect
Cable
40-2876
(Not used in Pulse
Accumulator)
Power Cable
40-2820-5
Ribbon Cable
40-2739 rev. ‘B’ or later
Serial access
port to MMX
board. Unplug
ribbon cable
from Messen-
ger Modem JP3
prior to use.
Notes:
1. Set baud rate in instrument to 2400 at item 126
2. Set Communication Delays to 25 seconds at items 171 & 172
4 CELL
Alkaline
Battery
Pack
40-2596
or
40-2595
To
telephone
line
NOTE: Use Configuration/Calibration Cable
(p/n 40-2696-1) or MPA (p/n 40-2620) to
make a serial link at access port. Unplug
the ribbon cable from modem JP3 prior to
attempting a serial connection. Use only
the MPA at main board J5 when attempting
firmware upgrades.

Messenger Modem®
Page 12
Messenger Modem DIP Switch Settings
1200 Baud
Enable Line Share
Enabled Ring Detect
Wake up on 1 Ring
Enable Wake-up on RS-232
Always On
Configuration Mode
RS-232 Mode
2400 Baud
Disable Line Share
Disable Ring Detect
Wake up on User Defined # of Rings
Disable Wake-up on RS-232
Serial Pass thru
CMOS Mode (w/ internal ribbon cable)
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
Off On
Switch settings for:
Mini-Max, including Sentry, ERX and Pulse Accumulator
( with pass-thru external serial connector)
Notes: a) The Disable Ring Detect feature is available starting with the version-3 board w/ firmware 2.14.
b) Set switches 2, 3, 4 & 7 according to individual site requirements.
After a switch position is changed, remove power for 10 seconds
(Set Baud Rate switch to 1200 baud for analog cellular operation)
(Note: DIP Switch as viewed when RJ11 connector is at bottom-right of board)

Messenger Modem®
Page 13
Messenger Modem Wiring Diagram
internal modem, w/pass thru connector
for:
Mini-Max, Mini-Max AT, Mini-Max ATX, Sentry, Sentry X, ERX and Pulse Accumulator
J3 J4
J5
JP3
TB1
J2
Mini-Max Board p/n 40-2572-xx
Power Disconnect
Cable
40-2876
(Not used in Pulse
Accumulator)
Power Cable
40-2820-5
Ribbon Cable
40-2739 rev. ‘B’ or later
Notes:
1. Set baud rate in instrument to 2400 at item 126
2. Set Communication Delays to 25 seconds at items 171 & 172
4 CELL
Alkaline
Battery
Pack
40-2596
or
40-2595
To
telephone
line
NOTE: Use Serial Cable (p/n 40-1629) at
external case connector to make a serial
link to instrument.
Use MPA (p/n 40-2620) at main board J5
when attempting firmware upgrades.
Dust Cap
Serial Pass-Thru
Cable Assy. 40-4918

Messenger Modem®
Page 14
Switch settings for:
Mini-Max w/ external shorting plug serial connector
1200 Baud
Enable Line Share
Enable Ring Detect
Wake up on 1 Ring
Enable Wake-up on RS-232
Always On
Configuration Mode
RS-232 Mode
2400 Baud
Disable Line Share
Disable Ring Detect
Wake up on Defined # of Rings
Disable Wake-up on RS-232
Serial Pass thru
CMOS Mode
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
Off On
After a switch position is changed, remove power for 10 seconds
(Set Baud Rate switch to 1200 baud for analog cellular operation)
Messenger Modem DIP Switch Settings
Notes: a) The Disable Ring Detect feature is available starting with the version-3 board w/ firmware 2.14.
b) Set switches 2, 3, 4 & 7 according to individual site requirements.
(Note: DIP Switch as viewed when RJ11 connector is at bottom-right of board)

Messenger Modem®
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TB1
Messenger Modem Wiring Diagram
internal modem, CMOS to RS-232 converter Bd. w/ ext. case connector & Shorting Plug
for:
Mini-Max, Mini-Max AT, Mini-Max ATX, Sentry, Sentry X, ERX and Pulse Accumulator
J3 J4
J5
Messenger Modem Board p/n 40-3000
Mini-Max Board p/n 40-2572-xx
Power Disconnect
Cable
40-2876
(Not used in Pulse
Accumulator)
Power Cable
40-2820-5
Notes:
1. Set baud rate in instrument to 2400 at item 126
2. Set Communication Delays to 25 seconds at items 171 & 172
CMOS to RS-232
Converter Bd and
Cable Assy. with
Shorting Plug
40-2717-3
To
telephone
line
4 CELL
Alkaline
Battery
Pack
40-2596
or
40-2595
Shorting
Plug
NOTE: Unplug the CMOS to RS-232 converter
board from main board J5 prior to plugging in
the MPA when attempting firmware upgrades.
TxD RxD COM

Messenger Modem®
Page 16
Switch settings for:
Mini-Max w/ external serial connector
1200 Baud
Enable Line Share
Enable Ring Detect
Wake up on 1 Ring
Enable Wake-up on RS-232
Always On
Configuration Mode
RS-232 Mode
2400 Baud
Disable Line Share
Disable Ring Detect
Wake up on defined # of Rings
Disable Wake-up on RS-232
Serial Pass thru
CMOS Mode (w/ internal ribbon
cable)
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
Off On
After a switch position is changed, remove power for 10 seconds
(Set Baud Rate switch to 1200 baud for analog cellular operation)
Messenger Modem DIP Switch Settings
Notes: a) The Disable Ring Detect feature is available starting with the version-3 board w/ firmware 2.14.
b) Set switches 2, 3, 4 & 7 according to individual site requirements.
(Note: DIP Switch as viewed when RJ11 connector is at bottom-right of board)

Messenger Modem®
Page 17
Messenger Modem Wiring Diagram
internal modem, CMOS to RS-232 converter Bd. w/ ext. case connector
for:
Mini-Max, Mini-Max AT, Mini-Max ATX, Sentry, Sentry X, ERX and Pulse Accumulator
J3 J4
J5
JP3
TB1
J2
Messenger Modem
Board p/n 40-3000
Mini-Max Board p/n 40-2572-xx
Power Disconnect
Cable
40-2876
(Not used in Pulse
Accumulator)
Power Cable
40-2820-5
Notes:
1. Set baud rate in instrument to 2400 at item 126
2. Set Communication Delays to 25 seconds at items 171 & 172
CMOS to RS-232
Converter Bd and
Cable Assy.
To
telephone
line
4 CELL
Alkaline
Battery
Pack
40-2596
or
40-2595
Dust
Cap
NOTE: Unplug the CMOS to RS-232 converter
board from main board J5 prior to plugging in
the MPA when attempting firmware upgrades.
JP4
TxD RxD COM
Serial Pass-Thru
Cable Assy.
40-4916

Messenger Modem®
Page 18
Switch settings for:
Mini-AT
1200 Baud
Enable Line Share
Enable Ring Detect
Wake up on 1 Ring
Enable Wake-up on RS-232
Always On
Configuration Mode
RS-232 Mode
2400 Baud
Disable Line Share
Disable Ring Detect
Wake up on Defined # of Rings
Disable Wake-up on RS-232
Serial Pass thru
CMOS Mode (w/ internal ribbon
cable)
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
Off On
After a switch position is changed, remove power for 10 seconds
(Set Baud Rate switch to 1200 baud for analog cellular operation)
Messenger Modem DIP Switch Settings
Notes: a) The Disable Ring Detect feature is available starting with the version-3 board w/ firmware 2.14.
b) Set switches 2, 3, 4 & 7 according to individual site requirements.
(Note: DIP Switch as viewed when RJ11 connector is at bottom-right of board)

Messenger Modem®
Page 19
Messenger Modem Wiring Diagram
internal modem, connected to Modem Port (TB-2)
for:
Mini-AT
To
telephone
line
Dust Cap
TB1
J2
Messenger Modem Board p/n 40-3000
Mini-AT Board p/n 40-2335
RS-232 Conn. &
Cable Assy.
40-1728
Notes:
1. Set baud rate in instrument to 2400 at item 272
2. Set Communication Delays to 25 seconds at items 171 & 172
6 CELL
Alkaline
Battery
Pack
40-1595
or
40-1865
J7 J8
Rxd
Txd
COM
TB2
J6
3-Cond Serial Cable
40-2133-8
Battery Cable
40-2565-10
TxD RxD COM
JP3

Messenger Modem®
Page 20
Switch settings for:
Mini-AT
1200 Baud
Enable Line Share
Enable Ring Detect
Wake up on 1 Ring
Enable Wake-up on RS-232
Always On
Configuration Mode
RS-232 Mode
2400 Baud
Disable Line Share
Disable Ring Detect
Wake up on Defined # of Rings
Disable Wake-up on RS-232
Serial Pass thru
CMOS Mode (w/ internal ribbon
cable)
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
Off On
After a switch position is changed, remove power for 10 seconds
(Set Baud Rate switch to 1200 baud for analog cellular operation)
Messenger Modem DIP Switch Settings
Notes: a) The Disable Ring Detect feature is available starting with the version-3 board w/ firmware 2.14.
b) Set switches 2, 3, 4 & 7 according to individual site requirements.
(Note: DIP Switch as viewed when RJ11 connector is at bottom-right of board)