The thing up top is a urinal cake & the thing next to it is tape. The 4903s have some paint on them.
Oh, really? Wonder how that got there…oh, tape? Kinda thought it might be that, but again: no idea what that’s doing there.
Fire Alarms at the Citizens Bank in Medford, MA
Simplex 4903-9236 Electronic Horn/Strobe (15CD, as shown by the Green Asterisk on the strobe reflector)
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Vintage & Rare Simplex 4903-9102+2901-9838 Horn in a Building Nearby the Bank; The building with this Vintage Simplex also has System Sensor SpectrAlert Classics
That might be a 4903-9001 instead (not sure what the difference is but something tells me the 9001 is a lot more common).
That’s a 9102. The 9102 is a Light Plate. 4903-9001s don’t exist. The 24VAC version is a 4903-9152
YAY!!! wait, how’d u know???
Not anymore, the system is replaced by a Firecom LSN-2000.
Ahem…
I’m also going by the fact that the 2903-9001 is one of the light models of the 2903-series of retrofit plates, & so logically that would apply to the 4903-series as well (going by the table there also appears to be no difference between the 9001 & 9102, but I’m still going to assume that the 9001 is the more common of the two going by the aforementioned 2903-series).
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Is that ceiling-mount white simplex speaker mounted inside an elevator? I’ve never seen that before but it makes sense.
Aha! That settles it. It is a 24VDC light plate! I thought they only made 9102s but I guess I’m wrong
Yes, that is. I don’t see too many elevators with Fire Alarms in them
I guess I’ve just known the rectangular ADA Compliant Simplex 4903 series for a long time.
Candela Indication:
Green Asterisk=15CD
Blue Circle=30CD
Orange Triangle=110CD
Audible Indication:
Silver Plated: Electromechanical Horn
Little Horn Buzzer, no silver plate: Electronic Horn
Disk in the middle: Speaker/Strobe (Older models had a matte black speaker with a light disk & newer models have a glossy lighter speaker with a black disk)
Here’s some of the models I know (Some of the common audible models); Most common models will be bolded & labeled with an asterisk. Models quoted will be a list of all models I found online. If they’re not quoted it means they were never found on YouTube, on an online website & eBay
Speaker/Strobes
"4903-9142 (25V, 30CD Red Horizontal)* "
4903-9143 (25V, 30CD Red Vertical)
"4903-9144 (25V, 110CD Red Horizontal)* "
“4903-9145 (25V, 110CD Red Vertical)”
"4903-9146 (25V, 15CD Red Horizontal)* "
“4903-9147 (25V, 15CD Red Vertical)”
“4903-9167 (25V, 15CD, White Horizontal)”
"4903-9168 (70V, 15CD, Red Horizontal)* "
4903-9169 (70V, 15CD, White Horizontal)
“4903-9170 (25V, 30CD, White Horizontal)”
"4903-9171 (70V, 30CD, Red Horizontal)* "
4903-9172 (70V, 30CD, White Horizontal)
“4903-9173 (25V, 110CD, White Horizontal)”
"4903-9174 (70V, 110CD, Red Horizontal)* "
4903-9175 (70V, 110CD, White Horizontal)
4903-9176 (70V, 15CD, Red Vertical)
4903-9177 (70V, 30CD, Red Vertical)
4903-9178 (70V, 110CD, Red Vertical)
"4903-9148 (Selectable, 30CD, Red Horizontal)* "
"4903-9149 (Selectable, 110CD, Red Horizontal)* "
"4903-9150 (Selectable, 15CD, Red Horizontal)* "
“4903-9153 (Selectable, 15CD, Red Vertical)”
“4903-9193 (Selectable, 15CD, White Horizontal)”
“4903-9194 (Selectable, 30CD, White Horizontal)”
“4903-9195 (Selectable, 110CD, White Horizontal)”
Horn/Strobes
"4903-9215 (Electromechanical, 30CD, Red Horizontal)* "
4903-9216 (Electromechanical, 30CD, Red Vertical)
"4903-9217 (Electromechanical, 110CD, Red Horizontal)* "
“4903-9218 (Electromechanical, 110CD, Red Vertical)”
"4903-9219 (Electromechanical, 15CD, Red Horizontal)* "
“4903-9220 (Electromechanical, 15CD, Red Vertical)”
“4903-9221 (Electromechanical, 15CD, White Horizontal)”
“4903-9222 (Electromechanical, 30CD, White Horizontal)”
4903-9223 (Electromechanical, 110CD, White Horizontal)
"4903-9236 (Electronic, 15CD, Red Horizontal)* "
"4903-9237 (Electronic, 30CD, Red Horizontal)* "
"4903-9238 (Electronic, 110CD, Red Horizontal)* "
“4903-9239 (Electronic, 15CD, Red Vertical)”
“4903-9240 (Electronic, 110CD, Red Vertical)”
“4903-9241 (Electronic, 15CD, White Horizontal)”
“4903-9242 (Electronic, 30CD, White Horizontal)”
"4903-9252 (Selectable, 15CD, Red Horizontal)* "
"4903-9253 (Selectable, 30CD, Red Horizontal)* "
"4903-9254 (Selectable, 110CD, Red Horizontal)* "
“4903-9255 (Selectable, 15CD, Red Vertical)”
“4903-9256 (Selectable, 110CD, Red Vertical)”
“4903-9257 (Selectable, 15CD, White Horizontal)”
“4903-9258 (Selectable, 30CD, White Horizontal)”
Sync Speaker/Strobes
"4903-9301 (25V, 15CD Red Horizontal)* "
4903-9302 (25V, 15CD Red Vertical)
"4903-9303 (25V, 30CD Red Horizontal)* "
4903-9304 (25V, 30CD Red Vertical)
"4903-9305 (25V, 110CD Red Horizontal)* "
4903-9306 (25V, 110CD Red Vertical)
4903-9325 (25V, 15CD, White Horizontal)
"4903-9326 (70V, 15CD, Red Horizontal)* "
4903-9327 (70V, 15CD, White Horizontal)
4903-9328 (25V, 30CD, White Horizontal)
4903-9329 (70V, 30CD, Red Horizontal)*
4903-9330 (70V, 30CD, White Horizontal)
4903-9331 (25V, 110CD, White Horizontal)
"4903-9332 (70V, 110CD, Red Horizontal)* "
4903-9333 (70V, 110CD, White Horizontal)
4903-9334 (70V, 15CD, Red Vertical)
4903-9335 (70V, 30CD, Red Vertical)
4903-9336 (70V, 110CD, Red Vertical)
Sync Horn/Strobes
"4903-9401 (Electromechanical, 15CD, Red Horizontal)* "
4903-9402 (Electromechanical, 15CD, Red Vertical)
"4903-9403 (Electromechanical, 30CD, Red Horizontal)* "
4903-9404 (Electromechanical, 30CD, Red Vertical)
"4903-9405 (Electromechanical, 110CD, Red Horizontal)* "
4903-9406 (Electromechanical, 110CD, Red Vertical)
4903-9413 (Electromechanical, 15CD, White Horizontal)
“4903-9414 (Electromechanical, 30CD, White Horizontal)”
4903-9415 (Electromechanical, 110CD, White Horizontal)
"4903-9422 (Electronic, 15CD, Red Horizontal)* "
"4903-9423 (Electronic, 30CD, Red Horizontal)* "
"4903-9424 (Electronic, 110CD, Red Horizontal)* "
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That could be a worst nightmare you’re right
Real. I heard these going off the other day. They’re so loud!
HOLY MOLY! I’VE SEEN DOCUMENTATION ON AUTOCALL VOICE SYSTEMS BUT I NEVER KNEW ANY EXISTED!!!