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B7.8
T807/808 Installation
M800-00
31/08/96
Copyright TEL
7.7
Parallel Operation
T807/808 power supplies may be operated in parallel as follows:
Set the output voltages to within 0.1V of each other.
Connect the supplies together with equal lengths of output wire.
Note:
With very light or no load, only one power supply may have its "On" LED
illuminated. This is normal and the LED's on the other supplies will illumi-
nate as soon as the load is increased.
7.8
Mains And/or Power Supply Failure Alarm
A mains and/or power supply failure alarm output signal (to -DC rail/0V) is available
on the T807/808 rear panel for system monitoring purposes.
Mains & power supply OK:
approx. +Vout (via 1k resistor - typ. 13.8V)
Mains &/or power supply failure:
approx. -Vout (via 11k resistors - typ. 0V)
(with or without a battery across
main DC output)
This alarm output can be directly connected to an optocoupler input of a T802 remote
monitor unit.
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