Installation manual

SAFEPATH Manual Sheet 17 of 78
Rev. C April 1999
Visual Notification Appliance Output Line Supervision
All visual notification appliance output lines are supervised. The lines are supervised for open circuits, short circuits, and ground faults when
the output is de-energized; and ground faults only when the output is energized. Output line supervision requires a LISTED 10K end-of-line
resistor to be installed on each output circuit and across the terminals of unused output circuits.
Audio Notification Appliance Output Line Supervision
All audio notification appliance output lines are supervised. The lines are supervised for open circuits, short circuits, and ground faults when
the output is de-energized. The lines are unsupervised when the output is energized. Output line supervision requires a LISTED 10K end-
of-line resistor to be installed on each output circuit and across the terminals of unused output circuits.
Amplified Speaker Notification Appliance Power Output Line Supervision
All amplified speaker notification appliance power output lines are supervised. The lines are supervised for open circuits, short circuits, and
ground faults when the output is de-energized, and ground faults only when the output is energized. Output line supervision requires a
LISTED 10K end-of-line resistor to be installed on each output circuit and across the terminals of unused output circuits.
Digital Voice Module Audio Supervision
The audio circuitry of each digital voice module output channel is supervised up to the secondary coil of the output transformer. When a
message is playing, a trouble condition is indicated if an audio signal is not detected for more than 3 seconds or a low impedance load (less
than 600 ohm) is connected to the line output. An audio signal not detected or low impedance load detected trouble condition will clear
automatically as soon as audio is detected or the low impedance load is no longer detected, respectively. When no messages are playing,
the circuitry is continuously supervised for functionality. If a circuitry failed condition is detected, the SAFEPATH panel will indicate a trouble
condition.
Serial Port Supervision
The SAFEPATH panel can receive commands over a serial port. The standard protocol used on the serial port is described in
Appendix A. If a second, optional protocol is provided on the serial port, it is described in Appendix B.
The serial port is supervised for communication errors and ground faults. A trouble condition will be indicated if a communication error is
detected, the SAFEPATH panel does not select a file, or the received command is not understood. The trouble condition will return to
normal with the next valid command received. See Appendix A (and B, if applicable) for additional serial port information.
The SAFEPATH panel also provides a response for each command received through the serial port. If so programmed, the control panel
can supervise the serial port by receiving and comparing the response of each transmitted command. The control panel can both verify the
integrity of the physical connection of the serial communication line and the integrity of the commands received by the SAFEPATH panel.
CAUTION:
External wiring to/from the serial port of the SAFEPATH panel is
not
supervised by the SAFEPATH panel.
Wheelock strongly recommends that the control panel be programmed to use the SAFEPATH panel's serial
response capability (described in Appendix A or B, if applicable) to verify the integrity of the serial
communications link and to record any communication errors for corrective action.
Ground Fault Supervision
The SAFEPATH panel has the ability to supervise for ground fault conditions on field wiring that is not electrically isolated. The supervised
wiring includes contact inputs and serial port wiring. All other wiring is electrically isolated. Ground fault supervision may be enabled and
disabled by placing the "GROUND FAULT ENABLE/DISABLE" jumper (JP2) on the digital voice module in the desired position. See Figures
5 and 6, respectively, for the location of the jumper (JP2) on the DX-100 and DX-200 printed circuit board within the SAFEPATH panel.
Memory Retention Battery Supervision
The DX-200’s digital voice module’s memory retention battery is supervised for correct placement and functionality. The battery is not
supervised for level of charge. The battery is checked by the circuitry once every 5 minutes.
Battery Back-Up Line Supervision
The battery back-up lines are supervised for open circuits, short circuits and ground faults.
Back-Up Battery Supervision
The back-up battery is supervised for low voltage conditions.
Telephone Line Supervision
When a telephone string file is selected to play out channel 1 of the digital voice module (DX-100 or DX-200), channel 1’s line out is
supervised for connection to a telephone line. The telephone line is supervised by monitoring the telephone line’s DC voltage and by
detecting the proper call progress tones. If either of these two parameters are not correct, the SAFEPATH panel will indicate a trouble
condition.
Telephone string files are also supervised for correct reception by the intended party. If three consecutive call attempts to the same phone
number go unanswered and/or unacknowledged, the SAFEPATH panel will indicate a trouble condition.
When channel 1 of the digital voice module is connected to a telephone line, it may not be used to play messages through an amplifier
module.
Remote Microphone Supervision
The optional remote microphone is supervised for proper operation and for open circuits, short circuits and ground faults.