Bender LINETRAXX PEM575 Series, Manual

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Application/inputs and outputs
53 PEM735_D00084_00_M_XXEN/02.2015
7. Application/inputs and outputs
7.1 Digital inputs (DI)
The device features six digital inputs which are internally operated with DC 24 V.
Digital inputs are typically used for
monitoring external statuses . The real-time
statuses of the digital inputs are available on the front panel LC display as well as
through connected system components. Changes in external statuses are stored as
events in the SOE log in 1 ms resolution.
One of the digital inputs can be programmed to
receive pulses for the synchro-
nisation of the demand measurement . The setting is to be carried out via register
6021 (page 128).
Digital inputs can also be used as
external time synchronisation pulse (see
page 86).
7.2 Digital outputs (DO)
The device features three digital outputs. Digital outputs are typically used for set-
point alarming , load control or remote control applications .
Examples:
1. Manually operated from the front panel (Chapter 6.8 Setup configuration via
the front panel)
2. Operation via communications interface (Chapter 10.19 DOx output control).
3. Control setpoints: Control actions in response to a specific condition
(Chapter 7.6 Setpoints)
4. Digital outputs triggered by logic modules
(Chapter 10.12 Logic module).
5. Triggered by undervoltage or overvoltage
(Chapter 9.4 Undervoltage/overvoltage setpoint (sag/swell setpoint)).
6. Triggered by transient events
(Chapter 9.5 Transient events setpoint).
7. Control via digital inputs
Priority : Front panel control has a higher priority and overwrites the other applica-
tions.
For a general alarm, all setpoints can be programmed to control the same digital
output. However, if the user intends to generate a control signal in response to a
specific setpoint condition, each DO may be controlled by only one source.