Setcom IM-900 User manual

Installation and Operation Manual
Systems 900 and 900E
System 900/900E Installation and Operation Manual M-0206 Rev. 3

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Table of Contents
1 General.................................................................................................................................................................. 4
2 System Description.............................................................................................................................................. 4
2.1 IM-900 ............................................................................................................................................................ 4
2.2 Standard Features IM-900 .......................................................................................................................... 5
2.3 System Description IM-900E ...................................................................................................................... 5
2.4 Standard Features IM-900E........................................................................................................................ 5
3 Components ......................................................................................................................................................... 6
3.1 IM-900 Intercom/Mixer Station ................................................................................................................... 6
3.2 IM-900E Intercom/Mixer Station................................................................................................................. 6
3.3 CSB-900 and CSB901 Series Headsets................................................................................................... 6
3.4 8B-900 and 8B-901 Series Headsets........................................................................................................ 7
3.5 CSB-900W3 and CSB-901W3 Wireless Headsets ................................................................................. 7
3.6 6B-900 and 6B-901 Series.......................................................................................................................... 8
3.7 5B-EMS900 and 5B-EMA901 Series Headsets....................................................................................... 8
3.8 25-0689 Coiled Extension Cable................................................................................................................ 8
3.9 ES-900-xx and ES-900RA-xx ..................................................................................................................... 9
3.10 ES-907-xx Extension Station.................................................................................................................... 9
3.10 RSJ-900RA-xx Remote Station Jack ...................................................................................................... 9
3.11 PS-900EMS EMS Remote Station ........................................................................................................ 10
3.12 JS-900-xx Jump Seat Station ................................................................................................................. 10
3.13 JS-900W-xx Jump Seat Station ............................................................................................................. 10
3.14 JS-901-xx and JS-902-xx Jump Seat Station with Expansion Port.................................................. 11
3.15 JS-901W-xx and JS-902W-xx Weatherproof Jump Seat Station with Expansion Port ................ 11
3.16 JSDB-902-10-30 Jump Seat Distribution Box with Tailboard Expansion Port................................ 11
3.17 JSDB-906 Jump Seat Distribution Box ................................................................................................. 12
3.18 PS-900-xx Pump Panel Station.............................................................................................................. 12
3.19 PS-900-30-2 Pump Panel Station.......................................................................................................... 12
3.20 TS-900-xx Tailboard Station................................................................................................................... 13
3.21 MACB-xx and LMACB-xx Microphone Adapter Cable ...................................................................... 13
3.22 RC-18xx Radio Cable .............................................................................................................................. 14
3.23 RC-xx Unterminated Radio Cable ......................................................................................................... 14

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3.24 MEC-9-xx Extension/Interconnect Cable.............................................................................................. 15
3.25 RIM-900-BAL Radio Interface Module .................................................................................................. 15
3.26 RSM-900, RSM-902 Radio Select Module........................................................................................... 15
3.27 FS-901-xx, FS-902-xx and FS-903-xx Footswitches .......................................................................... 16
3.28 PBS-901-xx, PBS-902-xx and DPBS-900-xx Push Button Stations................................................. 16
3.29 PRAC-9xx Portable Radio Adapter Cables .......................................................................................... 17
3.30 PRAC-Wxx Portable Radio Adapter Cable for System 900 Liberator Fire Wireless Headsets ... 17
4 Representative Systems................................................................................................................................... 18
4.1 Two Crew Wireless .................................................................................................................................... 18
4.2 Two Crew Driver Wireless......................................................................................................................... 19
4.3 Four Crew Wireless.................................................................................................................................... 20
4.4 Four Crew Driver Wired with Pump Panel.............................................................................................. 21
4.5 Four Crew – Three Radios – 8B Headsets............................................................................................. 22
4.6 Four Crew – Two Radios – EMS System .............................................................................................. 23
4.7 Two Crew – Two Radios – Using RCC-900.......................................................................................... 24
5 Installation ........................................................................................................................................................... 25
5.1 Before Starting ............................................................................................................................................ 25
5.2 Negative Ground......................................................................................................................................... 25
5.3 Pre-existing Conditions.............................................................................................................................. 25
5.4 Securing Station Hardware ....................................................................................................................... 26
5.5 IM-900 and IM-900E Master Stations...................................................................................................... 26
5.6 Microphone Adapter Cable, MACB-xx & LMACB-xx ............................................................................ 26
5.7 Remote Head Installation at the Pump Panel ........................................................................................ 27
5.7.1 RCC-900 Radio Cable Combiner Solution.......................................................................................... 27
5.7.2 MS-920 Solution ...................................................................................................................................... 28
5.8 Remote Jump Seat Stations ..................................................................................................................... 28
5.9 Weatherproof Exterior Stations ................................................................................................................ 28
5.9.1 Installation of Weatherproof Stations ................................................................................................... 29
5.10 Cable Installation...................................................................................................................................... 30
5.11 CSB 900 Series Headsets ...................................................................................................................... 30

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6 Troubleshooting.................................................................................................................................................. 31
7 Technical Support .............................................................................................................................................. 34
8 Setcom Warranty ............................................................................................................................................... 34
9 Helpful Links ....................................................................................................................................................... 34
10 Legacy Parts..................................................................................................................................................... 35
11 DIP Switch Configurations.............................................................................................................................. 36

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1General
This Operating Instruction describes the features, components, installation, and operation for the Setcom System
900 and 900E Intercom/Radio Mixers. Prior to commencing installation, read this manual completely through and
check the components ordered against those received. Prior to installation, the radio, alternator, and vehicle
battery should be in good working order. Any pre-existing receive or transmit problems with the radio should be
corrected prior to installation of the intercom.
2 System Description
2.1 IM-900
The Setcom System 900 is a vehicular intercom/radio mixer designed specifically for fire apparatus and other
emergency response vehicles. It provides noise-attenuating dual-speaker headsets with a Noise Reduction
Rating of 24dB for hearing conservation. It improves communications in-route by providing radio interface through
a noise-canceling boom-mounted microphone. An intercom system for communications between crewmembers is
also incorporated. The system is protected from radio frequency interference and vehicle-induced electronic noise
related to sirens, strobe lights, ignition system or alternator. The system provides two radio transmit circuits, this
allows for the Driver and an Officer to access the radio with the Pump Panel Station wired in parallel with the
Driver’s circuit. This means there can be a radio capable headset either at the Driver’s Station or at the Pump
Station, but there should not be a headset plugged into both stations at the same time. If two headsets are
plugged into the same circuit it will reduce the transmit level of the radio transmission and introduce background
noise from the second headset.
NOTE: These two ports are in parallel.
This means that a headset should not be
plugged into both ports at the same
time. Doing so will double load the
transmit circuit and may significantly
reduce the transmit signal level.
Use an IM-900E for vehicles requiring
more than two radio transmit circuits

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2.2 Standard Features IM-900
- Up to 10 headset positions
- All headset positions hear the radio and have intercom access
- Automatic operation - no master station adjustment controls
- RFI and EMI protection
- Officer and Driver/Pump Panel Stations have radio transmit access (IM-900)
- Only the keying station transmits on radio Note: Captains position will override the Driver.
- Weatherproof stations for exterior mounting
- Hand microphones and cabin speakers may be retained and used normally
- Radio transmit headset can be used with a portable radio with the proper adapter
- Footswitch port (can provide one or both radio transmit positions with a Footswitch or Push Button Station)
2.3 System Description IM-900E
The IM-900E is similar to the IM-900 with a few important exceptions. The 900E has a total of four radio access
circuits as compared to two for the IM-900. An AUX port on the IM-900E replaces the built-in footswitch port on
the IM-900. If a footswitch is needed for the IM-900E an ES-907 extension station with Footswitch Port can be
used. The AUX port can be used as a pump panel port to plug in a MS-920 Aerial System or other independent
radio access station for EMS/Rescue or command vehicles.
2.4 Standard Features IM-900E
- Up to 10 headset positions
- All headset positions hear the radio and have intercom access
- Automatic operation - no master station adjustment controls
- RFI and EMI protection
- Officer and Driver and two additional ports have radio transmit access
- Only the keying station transmits on radio
- Weatherproof stations for exterior mounting
- Hand microphones and cabin speakers may be retained and used normally
These positions all have radio access and
are on independent circuits. Key any of the
four positions and it will lock out the other
three microphones, only the keying
operator’s voice will be transmitted. All
other positions will still have full duplex
access to the intercom.
The Auxiliary Port has full radio and
intercom access and can be used for a
PS-900 Pump Station. PS-900EMS Rear
Compartment Radio Access Station, or
for daisy chaining a MS-920 Master
Station and an AS-920 for use on an
aerial.

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3 Components
3.1 IM-900 Intercom/Mixer Station
3.2 IM-900E Intercom/Mixer Station
3.3 CSB-900 and CSB901 Series Headsets
The IM-900 Intercom/Mixer contains all the electronics
necessary for the intercom amplifier and radio mixer
system. This station serves as the jack-in station for
Captain and Driver. A Pump Panel Station port is
paralleled off the Drivers circuit. It also provides ports for
the radio interface and intercom access with radio monitor
remote stations. A footswitch port allows either/both the
driver and Captain to key the radio with a footswitch or
push button stations. The IM-900’s small size (6.5”W x
5.0”H x 1.75”D) and lack of adjusting controls allows
mounting it anywhere in the vehicle.
The IM-900E Intercom/Mixer contains all the electronics
necessary for the intercom amplifier and radio mixer
system. This station serves as the jack-in station for
Captain and Driver and third radio transmit position. It
also provides an AUX port that can be used for a fourth
internal or exterior radio transmit station. An intercom
port for up to eight additional positions is included. The
IM-900E’s small size (6.5”W x 5.0”H x 1.75”D) and lack
of adjusting controls allows mounting it anywhere in the
vehicle.
CSB-900 Series Headsets utilize high noise attenuation
hearing protectors with a Noise Reduction Rating of 24dB in
conjunction with a noise canceling Electret microphone
mounted on a flexible boom. Standard configurations include
radio transmit headsets in both right and left dress models
designated, CSB-900R and CSB-900L respectively. Radio transmit
headsets have a volume control and a BLACK radio PTT
button mounted on the headset cup. CSB-900 headsets also
have a black backshell fitted to the plug. Although the CSB-900
headsets are intended for use at radio transmit stations in the
cab and at the pump panel position when at the scene, they
can be used at any station where a hot mic is desired.
CSB-900 Headsets with a 15 foot coil cord eliminate the need
to use an extension cord at the Pump Panel or other remote
stations. Radio transmit headsets may also be used with a
portable radio with the proper Portable Radio Adapter Cable
(PRAC). The CSB-901R & CSB-901L style headsets are for use at
the jumpseat positions as well as other remote locations. The RED
momentary PTT switch in this headset allows the user to talk on
the intercom but keeps unwanted noise off the line if the jumpseat
position is vacant, if preferred there is a Push-On/Push-Off PTT
switch and is designated with a -3. The plug backshell of the CSB-
901 headset is red, which identifies it as a non-radio transmit
headset. The 15 foot coil cord is standard; the six foot coil cord
version is identified by a -6 suffix (CSB-900R-6). Each headset
comes packaged with a hanger hook.

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3.4 8B-900 and 8B-901 Series Headsets
3.5 CSB-900W3 and CSB-901W3 Wireless Headsets
8B-900 Series Headsets utilize high noise attenuation hearing protectors
with a Noise Reduction Rating of 24dB in conjunction with a noise
canceling Electret microphone on a flexible boom. Standard
configurations include a radio transmit headset and an intercom only
headset, 8B-900 and 8B-901. The 8B-900 radio transmit headsets have
a volume control and a BLACK radio PTT button mounted on the
headset cup. 8B-900 headsets also have a black backshell fitted to the
plug. Although the 8B-900 headsets are intended for use at radio
transmit stations in the cab, they can be used at any station where a hot
mic is desired. 8B-900 Headsets come with a standard 15 foot coil cord.
Radio transmit headsets may also be used with a portable radio with the
proper Portable Radio Adapter Cable (PRAC). The 8B-901 reversible
dress headset is for use at the jumpseat positions as well as other
remote locations. The RED PTT switch in this headset allows the user to
talk on the intercom but keeps unwanted noise off the line if the
jumpseat position is vacant, , if preferred there is a Push-On/Push-Off
PTT switch and is designated with a -3. The plug backshell of the 8B-
901 headset is red identifying it as a non-radio transmit headset. 8B-901
Headsets also have individual volume control and a 15 foot coil cord. All
900 series dual muff headsets comes packaged with a hanger hook. A 6
foot coil cord is available and is designated with a -6.
25-1004
Charging Cable
•Up to 1200 feet of range (line of sight). Typical range 300ft.
•"Instant On" - No need to turn the headset on and off. Advanced
motion sensor technology has been integrated into the Liberator
Headset. Headset shuts down after 15 minutes of inactivity and will
automatically turn back on when the firefighter grabs the headset.
•Aerial Advantage™ Antenna - Setcom offers the only wireless
system on the market with the option to have an advanced antenna
designed to optimize the wireless connection between the cab of the
apparatus and an aerial platform or ladder. The Aerial Advantage™
antenna is engineered to increase the wireless range on the vertical
axis versus the lateral orientation of standard wireless systems
designed for emergency vehicle use.
•Up to 30 hours of continuous talk time allows for more uses with
fewer charges.
•Ability to integrate portable radio into the headset allowing the
firefighter to simultaneously communicate over 2 radio channels.
(Fire ground and Dispatch)
•Encrypted wireless link for maximum security.
•Elimination of some cables reduces intercom installation time and
cost.
•Premium dual-speaker headset with noise reduction rating of 24dB.
•Heavy-duty and durable design to extend life in a demanding
environment.
•Available in Behind-the-Head Style.
•Will operate while plugged into vehicle's power.
•Base Stations can be programmed for either Radio Transmit CSB-
900W3 or Intercom only CSB-901W3 also BASE Stations can be
programmed to allow Most Bluetooth®-enabled cell phones

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3.6 6B-900 and 6B-901 Series Headsets
3.7 5B-EMS900 and 5B-EMA901 Series Headsets
3.8 25-0689 Coiled Extension Cable
The 6B-900 series is a single ear muff, over the head, reversible
cable dress headset. Standard configurations include a radio
transmit headset and an intercom only headset, the 6B-900 and
6B-901 respectively. The reversible cable dress eliminates the
need for a Right or Left style. The headsets are always live on the
intercom and have radio Push-To-Talk and volume control located
on the Headset. This series of headset comes with a 15' Coil-Cord
The 5B-EMS900 is a single speaker headset that is
designed to allow the Medical Technician to hear the patient
in one ear and the intercom and radio audio in the other ear.
The headset has a reversible cable dress which allows it to
be worn on either side of the head. Volume control and the
radio PTT button are mounted in the in-line box as shown
left. A clothing clip is provided on the in-line box as well.
Standard configuration provides for a 28-inch straight cord
with a 15 foot coil cord. A 6 foot coil cord is optional. The
single muff encompasses the ear but offers no hearing
protection. The vinyl covered muff, replaceable windscreen
and the waterproof microphone make the 5B-EMS900 easy
to clean up when used for EMS operations.
This is a comfortable durable headset ideal for use in mobile
vehicles where hearing protection is not required.
The “Dash 3” version of the jumpseat headsets uses a
PO/PO (Push-ON/Push-OFF) switch. This allows the
crewmember to talk on the intercom without needing to hold
the PTT button on the headset. This headset is most
commonly used at a Tiller Station or in conjunction with a 25-
0689 15ft Coiled Extension Cable and the Tailboard Station
to assist the driver when backing up.

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3.9 ES-900-xx and ES-900RA-xx Extension Stations
3.10 ES-907-xx Extension Station
3.10 RSJ-900RA-xx Remote Station Jack
The ES-900-xx and ES-900RA-xx Extension Stations extend
any Tip-Ring-Sleeve (TRS) connection to a remote location. It
can be used in radio access or intercom only locations. The
ES-900-xx and ES-900RA-xx are commonly used to remote
the Driver and Officer locations when the IM-900’s location is
hidden. They can also be used in jump seat locations where
obstacles in the compartment make it difficult for two
crewmembers to both plug into a dual jumpseat station. The
ES-900-xx and ES-900RA-xx are available in a wide range of
cable lengths, with xx indicating the length.
The RSJ-900RA-xx Remote Station Jack is used to remote
radio transmit headset jacks on System 900 Master Stations
(IM-900, IM-900E, MS-922, MS-922E); with xx indicating the
length. The extension cable is unterminated on one end to
allow easy installation of Panel Mount Jack (part number 21-
8004). The cable is terminated with a right angle Tip-Ring-
Sleeve (TRS) connector on the other end.
Note: Panel Mount Jack must be isolated from chassis ground
– Part number 21-8004 Jack includes isolating nylon washers.
The ES-907-xx Extension Station extends any Tip-Ring-
Sleeve (TRS) connection to a remote location with the
addition of a foot switch port.

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3.11 PS-900EMS EMS Remote Station
3.12 JS-900-xx Jump Seat Station
3.13 JS-900W-xx Jump Seat Station
The PS-900EMS EMS Remote Station extends the
“Auxiliary Input” port of an IM-900E to a remote location.
It is most commonly used in an EMS/Rescue rig to
provide a radio transmit station for the medical
technician in the rear compartment.
The JS-900-xx Jump Seat Station provides two jumpseat intercom
access/radio listen positions. Due to the 15ft. coil cord length of the
Series 900 Headsets, a convenient position mid-way between two
crewmembers can easily be located. One end of the JS-900-xx is
fitted with a twist-lock connector that mates with the "REMOTES"
port of the IM-900 or the expansion port of a JS-901-xx. There are a
variety of lengths for the JS-900-xx, with xx denoting the length. A
red washer is used behind the Tip-Ring-Sleeve (TRS) female panel
mount jack to indicate this is an intercom-access/radio-listen port. A
CSB-900 or 8B-900 Series Radio Transmit Headset can be plugged
into this station; however, the radio PTT black button will not
function and the MIC will be Hot (Always On).
The JS-900W-xx is a weatherproof version of the Jump Seat
Station. It provides two jumpseat intercom access/radio listen
positions in a weatherproof enclosure. Due to the 15 coil cord length
of the Series 900 Headsets, a convenient position mid-way between
two crewmembers can easily be located. One end of the JS-900w-
xx is fitted with a twist-lock connector that mates with the
"REMOTES" port of the IM-900 or the expansion port of a JS-901-xx
or JS-901W-xx. There are a variety of lengths for the JS-900-xx,
with xx denoting the length. A CSB-900 or 8B-900 Series Radio
Transmit Headset can be plugged into this station; however, the
radio PTT black button will not function and the MIC will be Hot
(Always On).

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3.14 JS-901-xx and JS-902-xx Jump Seat Station with Expansion Port
3.15 JS-901W-xx and JS-902W-xx Weatherproof Jump Seat Station with Expansion Port
3.16 JSDB-902-10-30 Jump Seat Distribution Box with Tailboard Expansion Port
The JS-901-xx Jump Seat Station with Expansion Port is similar to
the JS-900-xx with the addition of an expansion port. This allows
additional remote stations to be daisy-chained together. The standard
JS-900-xx, another JS-901-xx, or a JS-902-xx for adding a tailboard
or tiller position can be plugged into the JS-901. No additional ports
are required at the master station and up to a total of eight headset
positions can be added in this manner. There are a variety of lengths
for the JS-900-xx, with xx denoting the length. The JS-902-xx Jump
Seat Station with Tailboard Expansion Port is identical in appearance
to the JS-901-xx, but it allows a TS-900 Tailboard Station to be
plugged in. If a series of stations are being daisy-chained to the
"REMOTE" port of the IM-900, the JS-902-xx is always the second-to-
last station in a chain of stations, with a tailboard becoming the last
station.
The JS-901W-xx Weatherproof Jump Seat Station with Expansion
Port is similar to the JS-900W-xx but adds an expansion port. This
allows additional remote stations to be daisy-chained together. The
standard JS-900W-xx, another JS-901W-xx, or a JS-902W-xx for
adding a tailboard or tiller position can be plugged into the JS-
901W-xx. No additional ports are required at the master station
and up to a total of eight headset positions can be added in this
manner. It is also possible to mix the JS-900-xx and the JS-900W-
xx variants. There are a variety of lengths for the JS-900-xx, with
xx denoting the length. The JS-902W-xx Jump Seat Station with
Tailboard Expansion Port is identical in appearance to the JS-
901W-xx. However, it allows a TS-900-xx Tailboard Station to be
plugged in. If a series of stations are being daisy-chained to the
"REMOTE" port of the IM-900, the JS-902-xx is always the second-
to-last station in a chain of stations, with a tailboard becoming the
last station.
The JSDB-902-10-30 is a single enclosure that provides
four jumpseat intercom-access/radio-listen headset
positions and a connection point for a TS-900 Tailboard
Station. The enclosure has four 20ft. unterminated
cables and one 20ft. cable terminated into a four-
conductor twist-lock connector that plugs into the
“REMOTES” port of the IM-900 or the “INTERCOM”
port of the IM-900E. Four Tip-Ring-Sleeve (TRS) panel
mount jacks are provided with this component and allow
the installer to mount the box in a remote or hidden
location and run the cabling to individual jumpseat
locations.
Note: Panel Mount Jacks must be isolated from chassis
ground

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3.17 JSDB-906 Jump Seat Distribution Box
3.18 PS-900-xx Pump Panel Station
3.19 PS-900-30-2 Pump Panel Station
The JSDB-906 is a single enclosure that provides six
jumpseat intercom-access/radio-listen headset positions.
The enclosure has six 20ft. unterminated cables and one
20ft. cable terminated in a four-conductor twist-lock
connector that plugs into the “REMOTES” port of the IM-900
or the “INTERCOM” port of the IM-900E. Four Tip-Ring-
Sleeve (TRS) panel mount jacks are provided with this
component and allow the installer to mount the box in a
remote or hidden location and run the cabling to individual
jumpseat locations.
Note: Panel Mount Jacks must be isolated from chassis
ground
The weatherproof PS-900-xx Pump Panel Station allows the use of a
mobile cab-mounted radio by the Engineer while at the pump panel.
The 15ft. coil cord of a CSB-900 Series Radio Transmit Headset is
plugged directly into the PS-900-xx, providing a fast and simple
connection. Since the volume control and Radio PTT are located in the
headset cup, no additional patch cables are required. The jack
receptacle is protected with a spring-loaded, weatherproof, flip-up
cover. The xx designates the length of shielded cable provided with the
standard PS-900-xx and is terminated with a twist-lock weatherproof
connector. The connector is plugged into the IM-900 port labeled
"PUMP PANEL”. On the IM-900E it is used in the “AUXILIARY INPUT”
port. Special care need to be taken in mounting the PS-900-xx to
retain the weatherproof integrity of the enclosure.
The weatherproof PS-900-30-2 Pump Panel Station is identical to
the PS-900-xx with the exception of the cable termination. This
version terminates with a three-conductor phone plug which can
be plugged into any of the Headset Ports on an IM-900 or IM-
900E. This Pump Panel Station is normally used with an IM-900E
system where a second Pump Station or a Turntable Station is
required.

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3.20 TS-900-xx Tailboard Station
3.21 MACB-xx and LMACB-xx Microphone Adapter Cable
The weatherproof TS-900-xx Tailboard Station provides a weather
tight intercom access/radio listen position. Length is 75 or 100 feet.
The TS-900-xx is normally used in conjunction with a 25-0689 15ft
Extension Cable and a jumpseat headset with a PO/PO (Push-
ON/Push-OFF) microphone. The PO/PO switch makes it easier for a
crew member to assist the driver when backing up. Normally used for
a tiller station that requires radio listen and intercom access, or the
tailboard that requires intercom only. The TS-900-xx is plugged into
the JS-902-xx Jump Seat Station with Expansion Port becoming the
last station in the "REMOTES" daisy-chain. Shielded cable is provided
with the TS-900-xx and is terminated with a twist-lock connector. The
TS-900-xx may also substitute for a PS-900-xx if the box and cable
orientation better suit the installation requirements.
The MACB-xx and LMACB-xx Microphone Adapter Cables allow
plug-in installation, retention of the hand mic, and easy exchange of
the radio for maintenance. Use of a Setcom MACB will not void a
new radio warranty and eliminates problems that can occur if a
radio cable is mis-wired. Some radios offer accessory ports that
provide these same features through using a terminated radio
cable. The Setcom radio interface identifier is denoted here with xx.
For example, the LMACB-MU, shown left, is for interfacing through
the hand microphone port on a Motorola Spectra; the “MU”
identifies the Spectra handmic port in this example. A standard
MACB-xx has a 20-inch radio cable, and a 6-foot cable to the IM-
900. The LMACB has an 18-foot cable to the IM-900. Some radios
allow all function to be accessed through the hand mic port, for
others the speaker audio is connected with flying leads that parallel
the external speaker leads.
NOTE: A few radios have handmics that are “HOT”. This means
the microphone is active and connected to the radio whenever the
radio is keyed. This can cause both the keying headset boom
microphone and the handmic to be active when the radio is keyed
from the intercom system. This will cause double loading of the
transmit circuits which will cause a decrease in transmit audio and
objectionable background noise from the handmic. On many newer
radios this problem can be eliminated through a menu item of the
radio’s software. Alternately, a handmic can easily be replaced or
converted to a version with contacts for both the microphone and
the PTT circuit or the handmic can be removed and stowed in the
glove box for backup purposes.

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3.22 RC-18xx Radio Cable
3.23 RC-xx Unterminated Radio Cable
The Terminated Radio Cable is fitted with the mating connector for the
port on the RIM-900-BAL and with the mating connector for the
accessory port or option cable of the radio on the other end. A radio
cable is used in place of a LMACB-xx (MACB-xx) Microphone Adapter
Cable on those radios with this accessory connector provision. A
terminated radio cable allows plug-in installation, retention of the hand
mic, and easy exchange of the radio for maintenance. Use of a Setcom
radio cable will not void a new radio warranty and eliminates problems
that can occur if a radio cable is miswired. The Setcom radio interface
identifier for the radio cable will follow the number indicating the length of
the cable. For example, in the Setcom part number RC-18GTC shown
left, the “RC” stands for Radio Cable, the “18” stands for length of the
cable in feet and the “GTC” is the Setcom radio interface identifier. The
GTC in this example means the cable will plug into a MA/COM P7 option
cable that connects to a range of MA/COM radios.
NOTE: A few radios have handmics that are “HOT”. This means the
microphone is active and connected to the radio whenever the radio is
keyed. This can cause both the keying headset boom microphone and
the handmic to be active when the radio is keyed from the intercom
system. This will cause double loading of the transmit circuits which will
cause a decrease in transmit audio and objectionable background noise
from the handmic. On many newer radios this problem can be eliminated
through a menu item of the radio’s software. Alternately, a handmic can
easily be replaced or converted to a version with contacts for both the
microphone and the PTT circuit or the handmic can be removed and
stowed in the glove box for backup purposes.
The RC-xx Radio Cable is terminated one end only for connection to a
IM-900/IM-900E Master Station. The length of the cable is indicated by
the xx in the cable name. It is unterminated on the radio connection
end. An unterminated radio cable is hardwired by a radio technician
directly to the radio. In some case the radio technician may install their
own plug and jack arrangement. A radio cable may be used in place of
a MACB-xx Microphone Adapter Cable, however, is not recommended
for self-installations being done by personnel not normally engaged in
technical services.
Warning: A radio manufacturer's warranty may be voided if the radio
case is opened or if a radio cable is soldered directly to the radio. To
ensure preservation of warranty, a terminated Radio Cable or
Microphone Adapter Cable should be used.
NOTE: A few radios have handmics that are “HOT”, this means the
microphone is active and connected to the radio whenever the radio is
keyed. This can cause both the keying headset boom microphone and
the handmic to be active when the radio is keyed from the intercom
system. This will cause double loading of the transmit circuits which will
cause a decrease in transmit audio and objectionable background
noise from the handmic. On many newer radios this problem can be
eliminated through a menu item of the radio’s software. Alternately, a
handmic can easily be replaced or converted to a version with contacts
for both the microphone and the PTT circuit or the handmic can be
removed and stowed in the glove box for backup purposes.

15
3.24 MEC-9-xx Extension/Interconnect Cable
3.25 RIM-900-BAL Radio Interface Module
3.26 RSM-900, RSM-902 Radio Select Module
The MEC-9-xx Extension/Interconnect Cable is used to
relocate any component with a four conductor Conxall
connector. Not normally sold with a new system, the
MEC-9-xx allows relocation of components when cable
has already been installed and it is not practical to
replace the component to a version with a longer
cable. The cable can also be used if a maintenance
breakaway is needed in a cable run as is the case in a
tractor/trailer configuration. The xx designate the
length feet of the cable.
The Radio Interface Module, RIM-900-BAL, allows
the user to adjust the levels of transmit and receive
audio, TX and RX respectively. The Radio Interface
Module accepts balanced audio input.
The Radio Select Module, RSM-902 and RSM-900,
allows the user to monitor two and three radios
respectively and to transmit on the selected radio. The
Radio Select Module consists of an 18ft cable
terminated with a four-pin Conxall to connect to the
“RADIO” port of the IM-900. There are two or three
one-foot cables terminated with the mating connector
to the “IM-900 end” of the 9RC Radio Cable or MACB-
xx Microphone Adapter Cable. If the radios being
connected to the Radio Select Module have different
transmit level setting, a separate Rim-900-BAL will be
needed for each radio.

16
3.27 FS-901-xx, FS-902-xx and FS-903-xx Footswitches
3.28 PBS-901-xx, PBS-902-xx and DPBS-900-xx Push Button Stations
A footswitch can be mounted for the Captain (FS-901-
xx), Driver (FS-902-xx) or both (FS-903-xx). When a
single footswitch is mounted, it can be wired to key
either the Driver or Captain's position. Although the IM-
900 can be mounted in different orientations, the Driver
has a pre-determined port due to the fact the Driver's
Port is paralleled with the Pump Station Port. For this
reason, the footswitches are identified as keying the
Captain's Headset or the Driver’s Headset.
Check to make sure you have the correct footswitch
for the position before installing!
Push Button Stations can be mounted for the Captain
(PBS-901-xx), Driver (PBS-902-xx) or both (DPBS-900-
xx). When a single Push Button Station is mounted, it
can be wired to key either the Driver or Captain's
position. Although the IM-900 can be mounted in
different orientations, the Driver has a pre-determined
port due to the fact the Driver's Port is paralleled
with the Pump Station Port. For this reason, the
Push Button Stations are identified as keying the
Captain's Headset or the Driver’s Headset.
Check to make sure you have the correct Push
Button Station for the position before installing!

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3.29 PRAC-9xx Portable Radio Adapter Cables
3.30 PRAC-Wxx Portable Radio Adapter Cable for System 900 Liberator Fire Wireless Headsets
PRAC-9G5 - For M/A-COM 700P, P7100, P7150 Radios
PRAC-9GV - For M/A-COM MRK Radios
PRAC-9KF - For Kenwood TK220, 240, 250, 260, 270, 272, 2100, 2160, 2170,
320, 340, 350, 360, 370, 372, 373, 3100, 3160, 3170, 3173, 2200, 2312, 3200
Portable Radios
PRAC-9KP - For Kenwood TK-280, 290, 380, 390, 480, 481, 2180, 3140, 3180,
5210, 5220, 5400 and NX-200/300 Portable Radios
PRAC-9M2 - For Motorola JEDI Series Portable Radios
PRAC-9M9 - For Motorola HT750, HT1250 Radios
PRAC-9MY - For Motorola GP300, SP50, GTX, P110, LTS2000, P1225, CT150,
CT250, CT450, PRO5150 Radios
PRAC-9MZ4 - For Motorola XPR6300, 6500 & 6550 APX 6000, 7000 Radios
A PRAC-9xx allows any system 900 radio transmit headset to be used with
a portable radio at the fire scene. The PRAC-9xx is fitted with the radio
connector, a jack for receiving the headset plug, and clothing clip. A radio
PTT is fitted to the PRAC for keying the portable. PRAC’s are available for a
wide range of portable radios. The radio connector type is indicated by the
last two letters in the part number. A few of the most common models are
listed below. Call for radio not listed.
A PRAC-Wxx allows any CSB900Wx headset to be used with a portable radio at
the fire scene. The PRAC-Wxx is fitted with a radio connector and a mini xlr for
plugging into the headset jack of the CSB-900Wx. PRAC-Wxx’s are available for
a wide range of portable radios. A few of the most common models are listed
below. Call for radio not listed.
PRAC-WG7 - For Harris P5300, P7300 Portable Radios
PRAC-WKF - For Kenwood TK220, 240, 250, 260, 270, 272, 2100, 2160, 2170,
320, 340, 350, 360, 370, 372, 373, 3100, 3160, 3170, Radios
PRAC-WKP - For Kenwood TK280, 290, 380, 390, 480,481,2180,3140,3180,
5210 & 5400 and NX-200/300 Portable Radios
PRAC-WM2 - For Motorola JEDI Series Portable Radios
PRAC-WM9 - For Motorola HT750, 1250 Portable Radios
PRAC-WMY - For Motorola GP300, SP50, GTX, P110, LTS2000, P1225,
CT150, CT250, CT450, PRO5150, CP150/200, PR-400 and SP21 Radios
PRAC-WMZ4 - For Motorola XPR6300, 6500 & 6550 APX 6000, 7000 Radios
PRAC-WTA - For Tait TP8100 Series Portable Radios
PRAC-WY11 – For Icom IC-M88, F30G, F30GS, F30GT, F31G, Radios
PRAC-WY4 - For Icom IC-F3, F3S, F30G, F31, F4, F4S, F4TR, Radios
PRAC-WY5 - For Icom F3G, F3GS, F4G, F4GS, F11, Radios
PRAC-WZE - For Vertex: VX130, VX160, VX180, VX210, VX210A Radios

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4 Representative Systems
All Setcom Intercom Systems are delivered with a System Diagram specific to the components ordered. Be sure
to have this System Diagram in hand before starting your installation. If your intercom system was installed by the
apparatus original equipment manufacturer, the Setcom System Diagram should be included with your manual. If
you cannot locate the System Diagram specific to your installation, contact Setcom at 1-650-965-8020 ext. 603
and a copy can be emailed/faxed to you. On the following pages a number of the most commonly used system
configurations are shown.
4.1 Two Crew Wireless
SYSTEM 900
HEADSET HEADSET
FOOTSWITCH
RADIO REMOTES PUMP
PANEL
POWER
IM-900
Intercom/Mixer
TX
AUDIO
RX
AUDIO
RADIOLEVEL
ADJUST
SN:S000011111
1 Amp
Fuse
RIM-900-BAL
Radio Interface Module
1 Amp Fuse
Driver Captain
25-0735-xx
25-0735-xx
B+
(12Vdc)
B+
(12Vdc)
Radio Cable
900W3-BASE
25-1004
GND
B+
(12Vdc) 900W3-BASE
25-1004
GND
B+
(12Vdc)
GND
B+
(12Vdc)
CSB-900W3
Wireless Headset
GND
B+
(12Vdc)
CSB-900W3
Wireless Headset
Radio
468.725

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4.2 Two Crew Driver Wireless
SYSTEM 900
HEADSET HEADSET
FOOTSWITCH
RADIO REMOTES PUMP
PANEL
POWER
IM-900
Intercom/Mixer
1 Amp Fuse
Driver
25-0735-xx
B+
(12Vdc)
CSB-900L
Wireless R/T Headset
Captain
TX
AUDIO
RX
AUDIO
RADIOLEVEL
ADJUST
SN:S000011111
1 Amp
Fuse
RIM-900-BAL
Radio Interface Module
B+
(12Vdc)
Radio Cable
900W3-BASE
25-1004
GND
B+
(12Vdc)
GND
B+
(12Vdc)
CSB-900W3
Wireless Headset
Radio
468.725