Description
The model 4950B is an ideal bell controller for use in factories
and schools. The 4950B permits programming the exact time that the bell is to ring. In
addition, the 4950B permits programming the interval of the ring from 1 to 99 seconds. Once a daily
pattern has been programmed, it will repeat every day of the week until reprogrammed. A
major feature of the 4950B is the smart timepiece circuit that continues keeping correct
time and day, even when the power fails for up to a 10 years. This feature assures that the
4950B will not have to be reprogrammed after every power failure. The
4950B does not
require any batteries to assure this feature.
Specifications
| Operating Voltage |
12V DC, 12, 24, 115,
and 230 VAC 50/60 Hz. |
| Output Relay |
20A SPDT, see PDF
specifications for details |
| Timing Mode |
24 Hour Programmable. |
| Timing Accuracy |
Time-Of-Day to ±2 minutes per month. |
| Programmable Output |
One (1) set of SPDT contacts. Contacts
close at the pre-programmed bell ringing event time, open at the end of programmed
interval. |
| Programmable Bell Events |
8 programmable bell ringing events over a 24
hour period, 56 events per week |
| Programmable Bell Interval |
1 to 99 seconds - starts at programmed time of
day |
| Timing Tolerance |
Based on the scheduled and displayed
time-of-day. |
| Repeatability Of Event Timing |
Based on the scheduled and displayed
time-of-day. |
| Digital Display |
Four (4) digit red LED, 0.5 inch high
characters displays, time-of-day, and all bell ringing event programmed schedules. |
| Time-Of-Day |
Displayed and set in 24 hour format. 6PM =
1800, 11PM = 2300 etc.. Time-Of-Day is maintained in a smart timepiece circuit that will
keep the time running for up to 10 years during a power failure. No batteries required, or
embedded in unit. |
| Program Memory |
EEPROM type maintains the programmed schedules
for up to 10 years without battery backup. |
| Front Panel Switches |
Membrane tactile type keypad, 0 - 9, *, and #. |
| Transient Protection |
Protected by silicon transient suppressors
which respond to transients within 1 x 10-12 seconds to a peak pulse power dissipation of
1500 watts, with transient surge currents to 200 amperes for durations up to 1/120 second
at 25 deg. C. Maximum transient voltage protection is 6000 volts as delivered through a
source resistance of 30 ohms with a maximum duration of 8.3 milliseconds. |
| Operating Temperature |
0 deg.C to +70 deg.C. |
| Construction |
Metal enclosure with
external keypad and knockout holes to facilitate wiring. Front panel
cover plate is removed to expose wiring terminals. |
| Programming Handbook |
A comprehensive handbook is supplied with each
model. The handbook provides all instructions, with examples, necessary to operate and
program the model 4950B. |
4950B Specifications , click to view, right
click - Save As ... to download.
4950B User Handbook , click to view, right
click - Save As ... to download.
Ordering Information
| Model |
Operating Voltage |
| 4950B |
-12VDC
-12VAC
-24VAC
-115VAC
-230VAC |
|
