Voltage Readings
The following readings can be taken using a standard voltage meter. All readings are taken using the sys-
tem ground as a reference.
NOTE: All readings below are approximations and must be used only as rough
guidelines. This is due to the variables created by each job site, such as wire lengths, num-
ber of stations, etc.
Common Connectors:
Wire Color Description Voltage Reading
Gray Audio- Levels on this line can vary, but must not be a constant +12 or +24 VDC.
Violet Audio+ Levels on this line can vary, but must not be a constant +12 or +24 VDC.
Blue +12 VDC +11 to 12 VDC.
Green Data Common 0 VDC.
Yellow Data Out See information below.
Orange Data In See information below.
Red Negative 0 VDC.
Brown +24VDC +24 VDC.
Peripheral Connector:
Wire Color Description Voltage Reading/Test Suggestion
Yellow/White Aide Input 0 VDC / Momentary application of +12 VDC will toggle call
status.
Green/White Nurse Input 0 VDC / Momentary application of +12 VDC will toggle call
status.
Orange/White Bath Input 0 VDC / Momentary application of +12 VDC will toggle call
status.
Red/White Emergency Input 0 VDC / Momentary application of +12 VDC will toggle call
status.
Brown/White Monitor Input 0 VDC / Momentary application of +12 VDC will initiate a
Monitor call that is reset by pressing the reset button on the sta-
tion. NOTE: A fire call can be triggered by applying a con-
stant +12 VDC to both Red/White and Brown / White at the
same time.
Black Code A Call active: +9 to 10 VDC. Call inactive: +12 VDC. This
input works in conjunction with Code B. When this input is
active, a trickle current runs constantly through the wires and
code station with an approximate load of 47,000 ohms. Short-
ing these lines together will trigger a code call manually.
White Code B Call active: +7 to 8 VDC. Call inactive: +1 to 2 VDC. / See
Black (Code A) information.
Gray Negative 0 VDC.
Violet +12 VDC +11 to 12 VDC.
Blue Lamp Fault This input must receive a constant +24 VDC input, or a lamp
fault will be triggered.
Green Red Dome Output +24 VDC w/ lamp off, 0 to +1 VDC when lamp is on.
Yellow Green Dome Output +24 VDC w/ lamp off, 0 to +1 VDC when lamp is on.
Orange Yellow Dome Output +24 VDC w/ lamp off, 0 to +1 VDC when lamp is on.
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©
TekTone Sound and Signal Mfg., Inc. All Rights Reserved
IL1057 Tek-CARE300III Installation Manual | 29
System Troubleshooting Guide
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