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Communication & Verification
DENT Instruments
PowerScout HD
Pulse scaling, resetting and accumulated values are accessed through registers and are “system” in
scope. Refer to the register list, ViewPoint HD, or videos for more information.
Alarm Output
Beginning in June 2020 the hardware alarm circuit in all PSHD meters is transitioning from
electromechanical (SPDT) relays to an isolated open collector type (shown below). This transition has
been made to focus on improving the behavior of the Voltage Phase Loss alarm response.
The alarm is designed to be connected to an external DC source between 5 and 24 volts and used with a
customer supplied pullup resistor. A 10k-ohm ¼ watt resistor is the recommended load for this circuit.
For more information regarding setting up alarms see the section “Configuring Alarms” earlier in this
manual.
Refer to the register list, ViewPoint HD, or instructional videos for more information.
Note: The Master Alarm relay is intended for low voltage DC connections.
12 Volt Auxiliary Power
The PS12HD, PS24HD, and PS48HD meters provide an auxiliary 12-volt output (200 mA max) that is
derived from an auxiliary winding on the PSHD’s line-connected power supply. The 12-volt supply
voltage is unregulated but protected by a self-resetting fuse. The purpose of the supply is to power
external radio equipment or provide supply voltage for analog sensors, such as 4-20 mA current loop
>50 mec
>50 mec
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