Ohio Medical Area Manual

Medical Gas Alarms
OHIO MEDICAL CORPORATION
P/N 255098 (Rev.8) 07/08
Installation and
Maintenance Manual
Area Alarm
Master Alarm
Combo Alarm

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
Page 2
NOTES

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
Page 3
SQUIRE-COGSWELL COMPANY WAS FORMED IN 1916 AS ASUPPLIER OF RAILWAY AND FOUNDRY
EQUIPMENT IN CHICAGO. ITCONTINUED ALONG THIS BUSINESS PATH UNTIL 1951 WHEN WALTER F.
DEVEREUX PURCHASED THE COMPANY. ATTHAT TIME THE COMPANY BEGAN TO CONCENTRATE ITS
EFFORTS ON ALINE OF NON-LUBRICATED AIR COMPRESSORS AND VACUUM PUMPS AND ANICHE
WAS FOUND SERVICING THE PRINTING PRESS INDUSTRY. UTILIZING THIS EXPERTISE, THE COMPANY
BEGAN TO SUPPLY CUSTOM PUMPING PACKAGES FOR AVARIETY OF APPLICATIONS AND IN THE
EARLY 1950’SSQUIRE-COGSWELL SOLD ITS FIRST HOSPITAL VACUUM PUMP PACKAGE, THE
CORNERSTONE OF TODAY’SBUSINESSES AND PRODUCT LINES.
IN1962, MR. HERBERT SCHIFTER, MR. DEVEREAUX’SSON-IN-LAW TOOK OVER AS PRESIDENT.
MR. SCHIFTER WAS THE ORIGINAL INVENTOR OF THE “DIAMOND ONE” GAS OUTLET WHICH HE
PATENTED IN 1959. THE BUSINESS GREW SIGNIFICANTLY AS ASUPPLIER OF CUSTOM DESIGNED
AND CONSTRUCTED VACUUM AND AIR COMPRESSOR SYSTEMS FOR MEDICAL AND INDUSTRIAL USE.
TODATE, SQUIRE-COGSWELL HAS MANUFACTURED OVER 15,000 HOSPITAL AIR COMPRESSOR AND
VACUUM PUMPING SYSTEMS THAT HAVE BEEN INSTALLED AROUND THE WORLD BEARING AVARIETY
OF VERY WELL-KNOWN TRADE NAMES.
TODAY IN THE THIRD GENERATION OF FAMILY OWNERSHIP AND MANAGEMENT, SQUIRE-COGSWELL
COMPANY CONTINUES TO SERVE THE WORLDWIDE NEEDS FOR HOSPITAL VACUUM PUMPING AND AIR
COMPRESSOR PACKAGES ALONG WITH THE COMPLETE HEALTHCAIR® MEDICAL GAS PIPELINE
OFFERING.
IN1962, THE SUBSIDIARY COMPANY, AEROS INSTRUMENTS, INC., WAS FORMED TO MANUFACTURE
SUCTION AND OXYGEN THERAPY EQUIPMENT FOR THE MEDICAL COMMUNITY. TODAY AEROS
CONTINUES TO MANUFACTURE ALL OF THE SALES REQUIREMENTS FOR ONE OF THE LARGEST
SUPPLIERS OF SUCH EQUIPMENT IN THE WORLD. ATTHE SAME TIME, AEROS INSTRUMENTS
PRODUCES AND SELLS IT’SOWN LINE OF PORTABLE SUCTION MACHINES UNDER THE WELL-KNOWN
NAMES OF MOBLVAC ®, INSTAVAC ®, CARE-E-VAC ® AND TOTE-L-VAC ®.
THE AEROS INSTRUMENTS SUBSIDIARY, WHICH IS AN ISO 13485 REGISTERED COMPANY AND IS A
GOVERNMENT REGISTERED MEDICAL DEVICE MANUFACTURER, PRODUCES THE HEALTHCAIR®
SERIES OF MEDICAL GAS PIPELINE EQUIPMENT INCLUDING THE MEDICAL GAS OUTLETS AND
MEDICAL GAS ALARM SYSTEMS.
SQUIRE-COGSWELL/AEROS INSTRUMENTS INC. ARE THE ONE SOURCE FOR ALL MEDICAL GAS
PUMPING, MEDICAL GAS PIPELINE EQUIPMENT AND MEDICAL ASPIRATION EQUIPMENT. FROM
CUSTOM DESIGNED PUMPING SYSTEMS TO THE MOST MODERN LINE OF ASPIRATION EQUIPMENT
AND MEDGAS PIPELINE AVAILABLE ANYWHERE, SQUIRE-COGSWELL–AEROS DOES IT ALL. NO
OTHER SUPPLIER SURPASSES OUR CONTINUITY OF EXPERIENCE AND LEADERSHIP IN THE MEDICAL
GAS PUMPING, PIPELINE AND ASPIRATION MARKETS.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
Page 4
T A B L E O F C O N T E N T S
1.0 Responsibilities................. .......... .......... ......... .......... .......... .................... .......... 5
1.1 Installer .. .................... .......... .......... ......... .......... .......... .................... .......... 5
1.2 User ....... .................... .......... .......... ......... .......... .......... .................... .......... 5
2.0 System Description & Function .... .......... ......... .......... .......... .................... .......... 5
2.1 Sensor Module........... .......... .......... ......... .......... .......... .................... .......... 7
2.2 Annunciator Panel...... .......... .......... ......... .......... .......... .................... .......... 8
2.3 Area Alarm Module .... .......... .......... ......... .......... .......... .................... .......... 9
2.4 Master Alarm Module. .......... .......... ......... .......... .......... .................... .......... 9
3.0 Labeling ....... .................... .......... .......... ......... .......... .......... .................... .......... 10
3.1 Area Alarm Module Labeling. .......... ......... .......... .......... .................... .......... 10
3.2 Master Alarm Module Labeling ........ ......... .......... .......... .................... .......... 10
4.0 Installation.... .................... .......... .......... ......... .......... .......... .................... .......... 12
4.1 Mounting Instructions Prior to Drywall & Plaster Installation ................. .......... 12
4.2 Installation & Wiring Instructions After Drywall & Plaster Installation .... .......... 13
4.3 Area Alarm Remote Output Signal Connections... .......... .................... .......... 16
4.4 Master Alarm Connections From Source Equipment....... .................... .......... 17
4.5 Dry Contacts Master Alarm Output Connections .. .......... .................... .......... 18
4.6 Remote Audible Alarm Installation... ......... .......... .......... .................... .......... 19
4.7 Initial Start-Up Checks .......... .......... ......... .......... .......... .................... .......... 20
5.0 Programming .................... .......... .......... ......... .......... .......... .................... .......... 20
5.1 Programming Chart.... .......... .......... ......... .......... .......... .................... .......... 21
5.2 Default Settings Tables......... .......... ......... .......... .......... .................... .......... 22
5.3 Calibration Precautions......... .......... ......... .......... .......... .................... .......... 23
5.4 Programming Change Example....... ......... .......... .......... .................... .......... 24
5.5 Review Area Alarm Programming Parameters ..... .......... .................... .......... 24
5.6 Master Alarm Programming Mode ... ......... .......... .......... .................... .......... 24
6.0 LonWorks® Capabilities ... .......... .......... ......... .......... .......... .................... .......... 25
7.0 Specifications.................... .......... .......... ......... .......... .......... .................... .......... 25
8.0 Troubleshooting ................ .......... .......... ......... .......... .......... .................... .......... 26
9.0 Cleaning....... .................... .......... .......... ......... .......... .......... .................... .......... 27
10.0 Service Item List ............... .......... .......... ......... .......... .......... .................... .......... 27
11.0 Warranty ...... .................... .......... .......... ......... .......... .......... .................... .......... 29

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
Page 5
1.0 Responsibilities
The information contained in this Installation and Operation Maintenance Manual, pertains only to the
Ohio Medical Corporation medical gas alarm system. The medical gas alarm system will operate in
conformance with the descriptions outlined in this manual only when it is operated, maintained and
serviced properly and in compliance with the instructions contained herein.
1.1 Installer Responsibilities
All contents of the alarm are shipped in ISTA approved packaging. The alarm should be handled,
installed, and tested per the recommended practices in this manual. Should such repair or
replacement become necessary, contact Ohio Medical Customer Service (800-448-0770) for original
equipment replacement parts.
1.2 User Responsibilities
The alarm should be tested and examined periodically. Any parts which are found to be damaged,
corroded, contaminated, etc. should be replaced. Possible replacement items are listed on pages 26
to 27 in this manual. Should such repair or replacement become necessary, contact Ohio Medical
Customer Service (800-448-0770) for original equipment replacement parts.
2.0 System Description & Function
The Ohio Medical Corporation Medical Gas Alarm System is designed to continuously monitor the
status of source equipment and gas line pressure of medical gases. The system is comprised of Area
Alarm Modules which monitor and indicate the gas pressure or vacuum level of a specific gas at a
specific point in the hospital and Master Alarm Modules which monitor source equipment such as
oxygen systems, air compressors or vacuum pumps.
The Alarm System monitors gas line pressure with sensors. The Alarm’s Annunciator determines the
status of the pressure and the pressure is displayed on an area alarm module. The alarm module also
has trend light LED’s to show that the displayed pressure is either in a normal, caution, or a high or
low alarm condition.
The Alarm System also has a master alarm module to monitor 10 condition points from source
equipment. Each point represents a condition that the source equipment might have. A dry contact
version of the master alarm is also available to relay conditions of the source equipment to a building
management system.
More detailed descriptions of each module is explained on pages 5 through 8.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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2.2 Annunciator Panel
The Annunciator Panel is the main processing board for the Medical Gas Alarm System. The
Annunciator Panel accepts information by two different means. For gas pressure, the input
signal comes from the Sensor Module and goes to the annunciator to evaluate the pressure
being observed. This information is then transmitted directly to the corresponding Area Alarm
Module where the pressure or vacuum is displayed via the ribbon cable. For source
equipment, a condition is relayed to a point on a master alarm module first and then
transferred to the Annunciator via the ribbon cable. In normal operation, the Annunciator
continuously monitors all pressure, vacuum, and source equipment for alarm conditions.
When an alarm condition is detected, an audible alarm (approximately 80 decibels measured
at 3 feet) will sound and the appropriate red LED will illuminate from the corresponding Area
or Master Alarm Module. The audible alarm will sound under one of the four conditions listed
below.
■When the pressure input increases above a specified high set-point
□When the pressure or vacuum decreases below a specified low set-point
■When an alarm condition is detected on the Master Alarm Module
■When one of the Sensor Module’s wiring has become disconnected
There are two momentary push buttons on the Annunciator Panel, which are labeled as
“TEST” and “ALARM SILENCE/RESET”. To stop the audible alarm from sounding, press the
“ALARM SILENCE” button. However, the alarm will re-sound again after the specified repeat
time has elapsed unless the alarm condition has been cleared. When a new alarm condition
is detected from another alarm panel, the audible alarm will sound again. Each time the
“Alarm Silence” button is pressed the alarm repeat time will reset. To review if the alarm’s
displays and audible alarm are in working order, press the “TEST” button for approximately 3
seconds. While testing, all display segments and independent LED’s will be illuminated and
the audible alarm will sound.
The Annunciator has a relay for wiring an external buzzer to a remote location. This relay
energizes the external buzzer when the audible alarm sounds.
A communications port is provided on the Annunciator Panel that allows for integration with a
LonWorks® network system allowing the medical gas alarm system to communicate with a
LonWorks® capable building management system.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
Page 9
2.3 Area Alarm Panel
The Area Alarm Panel provides a digital display of the actual gas
line pressure or vacuum being monitored. The module has three
different color trend lights to indicate three different conditions of
the gas pressure. These colors are green, yellow and red for
normal, caution, and high or low pressure indications
respectfully. The trend lights and how they correspond to range
in pressure is explained in more detail while programming in
Chapter 5.2 on page 21. When an alarm detects a “LOW” or
“HIGH” condition the corresponding red LED on the Area Alarm
Panel will be illuminated and an audible alarm will sound from
the Annunciator Panel. The red LED will stay illuminated until the
alarm condition has been corrected and the “Reset” button is
pressed.
The two LED’s above the colored trend lights indicates which
unit of measure is being displayed. The units are English
(Standard) or Metric units for pressure or vacuum accordingly
and can be changed to whichever units when programming.
The Area Alarm Module has dry contacts on the backside to
connect to a pair of contacts on a Master Alarm Module for
remote monitoring purposes.
2.4 Master Alarm Panel
The Master Alarm Panel monitors dry contacts from source
equipment or area alarm panels. Each individual Master Alarm
Panel can monitor up to 10 signals. Each pair of contacts is
either configured for normally open or normally closed operation.
The default mode is normally closed per NFPA code. The
Master Alarm panel may be easily labeled to indicate each of the
conditions being monitored. A Dry Contact Master Alarm Module
is also available for computer interface or service to a building
management system.
In operation, the unit continuously monitors for alarm conditions.
Except for the green “POWER” indicator, all Master Alarm Panel
LED lamps will be off when there are no alarm conditions
present. When an alarm condition is detected, the
corresponding LED on the Master Alarm Panel will flash and the
audible alarm from the Annunciator Panel will sound. The LED
will continue to flash until the alarm condition has been corrected
and the alarm has been reset. If two or more alarm condition
occur at the same time, the most recent alarm will flash and the
other existing alarms will remain in constant illumination. Any
alarm will remain lighted until the respective alarm condition has
been corrected and the alarm has been reset.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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3.0 Labeling Alarm Modules
Each application needs to describe the medical gas conditions and locations that are unique
to each installation. To provide clear and precise representation of this information, the area
and master alarm modules allocate a sufficient size area on their displays to label this
Information. To simplify in labeling the area or master alarms, please try to label these
assemblies prior to connecting leads to the dry contacts.
3.1 Labeling Area Alarm Modules
For ease of referencing what specific location the area alarm is representing, a window on
the bottom of each alarm is provided to label this information. See Labeling Module
Diagram on figure 3.
1. Make sure the alarm assembly is turned off prior to servicing.
2. Referencing figure 9, disconnect the cable ribbons leading to and from adjacent PCB/
Weldment assemblies.
3. Unfasten top and bottom hex nuts only. Do not unscrew the button head screws
attaching the circuit board to the weldment plate.
4. Extract the area alarm PCB/Weldment assembly from the front panel assembly.
5. Either slide required label through pocket provided in mylar screen or affix required label
directly over screen per Figure 3.
6. Refasten the master alarm assembly to the front panel with the hex nuts.
7. Reconnect cable ribbons as demonstrated in figure 6 on page 14 of your manual.
3.2 Labeling Master Alarm Modules
For ease of referencing what specific alarm conditions are present, each LED on the master
alarm module can be labeled to identify what condition it is represent. See Labeling Module
Diagram on figure 3.
1. Make sure the alarm assembly is turned off prior to servicing.
2. Disconnect cable ribbons from master alarm board.
3. Unfasten top and bottom hex nuts only. Do not unscrew the button head screws
attaching the circuit board to the weldment plate.
4. Extract master alarm PCB/Weldment assembly from the front panel assembly
5. Either slide required label through pocket provided in mylar screen or affix required
label directly over screen per Figure 3. Note that the “MA 1” dry contact will activate
the top LED, the “MA 2” contact activates the second from the top, and then follows
on down in that consecutive order.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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4.0 Installation
For ease of installation, the Ohio Medical Corporation medical gas alarm is delivered in two
separate assemblies; the box assembly and the front frame assembly. All box assemblies
include the box itself, mounting brackets and hardware, the power supply, the terminal block
and the fuse holder module. When specified for “local” installation, per the customer
requirement, the appropriate sensor modules equipped with gas-specific DISS demand check
units and type K copper stubs are also part of the box assembly. When the customer has
specified a “remote” sensor installation, the sensors are not part of the box assembly and will
be shipped loose.
The front-frame assembly consists of the frame, hinge, the Annunciator module and the
individual Area or Master Alarm modules as specified by the customer. The front-frame
assembly is fully wired and tested at the factory. To insure product functionality, leave the
front panel in the anti-static bag(s)) and packaging until it is ready to be installed.
4.1 Mounting Instructions (Prior to Drywall & Plaster Installation)
The box assembly includes adjustable brackets to allow for varying wall thickness and for
ease of installation.
1. Remove the power supply cover.
2. Install the brackets to the left and right sides of the box assembly using the hardware
provided. Do not tighten hardware at this time.
3. Adjust the brackets so that the front edge of the box assembly will be flush with the
finished wall.
4. Tighten the hardware securing the mounting brackets to the box assembly.
5. Mount the box securely to the wall studs at the desired height.
6. The copper pipe stubs may now be silver-brazed to the appropriate gas pipeline. The
pipe stubs are clearly marked with color coded labels indicating the correct gas. Take
extreme caution not to overheat the DISS check units during the brazing process by
wrapping the lower part of the pipe stub in a cool, damp cloth. In remote sensor
installations, the installer must braze a tee with a ¼” NPT Female port at a convenient
location. The Remote Sensor Module can then be installed into the appropriate gas
pipeline.
7. Per NFPA-99 and/or local standards, pressure testing of all joints must be inspected for
leaks. When spraying leak-testing solution on the check units adjacent to the sensor
modules, it is recommended to do so conservatively and with a solution consisting of
liquid dishwashing detergent and distilled water only. Verify that each gas stub is
connected to a pipeline which carries the same gas labeling as the sensor module does.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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4. Connect the DC power from the power supply to the Annunciator Panel. The five-wire
connection cable is used to make this connection. This cable can only be installed
one way, it makes the connection from on the power supply to position “J8” of the
Annunciator Panel. This connection will provide the voltage needed for operation of all
panels and sensors.
5. After all interconnections have been made, the AC power may be connected to the
power terminal strip. The hot wire is connected to the fused terminal block, the neutral
wire to the neutral terminal block and the ground wire is connected to the green/yellow
terminalblock.
6. Re-install the power supply cover.
4.3 Area Alarm Remote Output Signal Connections
Included on each Area Alarm Panel are contacts to be used to transmit an alarm condition to
a Master Alarm Panel or to other slave alarm device, if required. These contacts may be
used to transmit either a “High Alarm” or “Low Alarm” condition and may be used in either a
normally open or normally closed state. The usual connection scheme when connected to a
master alarm panel is to make these connections in the normally open mode using the relay
connection terminals marked “N.O.” and “C”. These contacts are clearly marked on the Area
Alarm circuit board. See Figure 7 for more details. NOTE: Do NOT wire the sensor modules
directly to the area alarm modules
Output Contact Positions
1 2 3 4 5 6
Output Contacts to
a Master Alarm
for High Alarm
Condition.
Contact Positions:
1. Normally Open
2. Normally Closed
3. Common
Input connection
from the
annunciator or the
previous area alarm
module
Output Contacts to a
Master Alarm for Low
Alarm Condition.
Contact Positions:
4. Normally Open
5. Normally Closed
6. Common
Output connection going
to the next area alarm
module or a master
alarm module.
Figure 7: Area Alarm Module

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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4.4 Master Alarm Connections from Source Equipment
Each Master Alarm Panel may accommodate up to 10 alarm inputs. Dry Contacts from
source equipment are connected directly to the Master Alarm Panel circuit board at positions
“MA1” through “MA10”. Each of these contact points is clearly marked on the circuit board
and includes both positive (+) and negative (-) terminals. The dry contacts from the source
equipment must be rated for at least 12 VDC.
WARNING — THE EQUIPMENT THAT IS CONNECTED TO THIS INTERFACE IS NOT
CONSIDERED TO BE PART OF THE SYSTEM CONFIGURATION UNLESS THE EQUIPMENT
IN QUESTION COMPLIES WITH THE STANDARD FOR HOSPITAL AND SIGNALING AND
NURSE CALL EQUIPMENT, UL 1069
The “Maintenance Mode” switch needs to be on to disable the audible alarm while wiring
contacts to the master alarm module. To make the Maintenance switch active, move the
switch at position “S11” on the Master Alarm Module toward the row of switches labeled “S1”
to “S10” as shown in Figure 8A. The maintenance lamp will be illuminated on the front of the
panel. Moving the switch away from the row of switches will restore the Master Alarm to
normal operation.
Switch settings on the Master Alarm Panel must be set to configure each alarm point for
normally open or normally closed operation. As shown on Figure 8A, the switches are on
the headers labeled “S1” through “S10”. The switches at position “S1” corresponds to the
alarm connected to the first pair of contacts “MA1”, “S2” to “MA2”, “S3” to “MA3”, and so on.
If one of the S1 through S10 switches is positioned toward the “S11” switch, the circuit loop is
normally open. It will cause an alarm when a closed contact is applied to the input terminal
strip (MA1-MA10). The switches at positions S1 & S3-S10 are shown in this position in
Figure 8A. This is the factory default setting. Any pair of contacts that are not connected to
source equipment should have their corresponding switch positioned toward the
maintenance switch.
If one of the S1 through S10 switches is positioned away from the S11 switch, the circuit loop
is normally closed. The contact will create an open circuit loop when an alarm condition
exists. The S2 switch is shown in this position in figure 8A. This is the setting for input
contact that is closed during normal operation but open during an alarm condition.
Per NFPA 99, information relayed from the source equipment is to be sent to two separate
master alarm panels at separate locations inside the medical facility. Wiring from the
source equipment is to be ran in parallel to each master alarm module and can not to be
slaved from one master alarm panel to the another.

Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.com
Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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4.5 Dry Contact Master Alarm Output Connections
CAUTION: When testing the output relays, make all connections with the power off.
Shorting the terminals together while the relay is energized can cause permanent
damage to the relay.
Dry Contact Master Alarm Panel is similar to the Master Alarm Panels except that they also
provide 10 alarm outputs that connect to building management systems. These additional
connections are connected directly to the Dry Contact Master Alarm Panel circuit board at
position “J1” through “J10” as shown in Figure 8B. Each of these pairs of contacts are clearly
marked on the circuit board and includes both positive (+) and negative (-) terminals. The dry
contacts going to the other alarm devices or a building management system must be rated for
at least 12 VDC.
Figure 8A:
Wiring from Source Equipment to a
master alarm position
(On either master alarm modules)
Figure 8B:
Wiring from a master alarm Position to a
Building management System
(On Dry Contact Master Modules Only)
Wiring from the source equipment to the second pair of
contacts on the bottom row (MA2) on the master.
Second pair of
contacts on
the top row
(J2) is wired to
a building
management
system
Corresponding
switch to the second
pair of contacts, S2,
on the master
showing “Normally
Closed Circuit Loop”
Maintenance Switch, S11, in
the “ON” position
Input Connection from
Annunciator or previous alarm
module.
Output Connection to the next
master alarm module.

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Medical Gas Alarm Manual ■255098 (Rev.8) 07/08
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4.6 Remote Audible Alarm Installation
The “medical gas alarm system includes two provisions to provide remotely mounted audible
or visual alarms which will operate in parallel with the audible alarm on the Annunciator Panel
and will sound each time that the alarm sounds. The connections for the remote alarm are on
the Annunciator panel.
The +24V and ground terminals allow a buzzer similar to the one mounted on the
Annunciator Panel to be used as an remote buzzer. If a different type of buzzer is desired for
external mounting, the relay contacts could be used in conjunction with another power source
to supply the necessary power.
To connect a remote buzzer, which is, similar to the one installed on the Annunciator
panel:
1. Connect the +24V terminal to the positive (+) power terminal of the remote buzzer.
2. Connect the negative ( - )terminal of the buzzer to the COM terminal of J7.
3. Connect a jumper across the N.O. terminal of J6 to the GND terminal of J7.
To connect an independent 24V relay-operated device:
1. Connect the positive (+) terminal of the external power supply to the positive (+) terminal
of the remote buzzer.
2. Connect the ground terminal of the external power supply to the normally open (N.O.)
terminal of “J6” on the Annunciator panel.
3. Connect the common (COM) terminal of “J7” on the Annunciator panel to the negative
terminal (-) of the external buzzer.
Figure 9: Annunciator
Programming Buttons
Sensor
Plug
Connection
Power
Supply
Connection
Remote Audible Alarm
Connection (J7)
Remote Audible Alarm
Connection (J6)
LonWorks®
Connection