Tecnoware EVO DSP TM, Руководство пользователя

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UPS EVO DSP TT 29 User’s Manual
8.3 Digital Inputs (UPS OFF and GEN ON)
Voltage to be applied to the digital inputs is 5 VDC. Maximum current drawn by each input is 1 mA.
5V connector provided on the Communication Interface board can be used to supply both digital inputs.
Pay attention to the polarity of the voltages applied to the digital input terminals.
Input Function
UPS OFF
If the UPS OFF input is set high by applying 5 VDC voltage on the related
terminals, UPS stops generating the output voltage and stops feeding the load.
When the voltage on the digital input is removed, the UPS starts up according to
the normal procedure.
GEN ON
If the GEN ON input is set high by applying 5 VDC voltage on the related
terminals, UPS smoothly increases the current drawn from the generator during
transitions from Battery mode to Normal mode.
8.4 Free Contact Communication
Free contact relay connection cables shall have a cross-section of 1.5 mm
2
.
Maximum voltage to be applied to the relay contacts is 42 VAC RMS (sinus) or 60 VDC.
Maximum contact current depends on the applied voltage and the load characteristic.
Both maximum voltage and maximum contact current corresponding to the applied
voltage shall not be exceeded.
Maximum allowed resistive contact currents for several voltages are given on the table below:
Applied voltage Maximum contact current for resistive load
Up to 42 VAC 16 A
Up to 20 VDC 16 A
30 VDC 6 A
40 VDC 2 A
50 VDC 1 A
60 VDC 0.8 A
Each relay has both a normally open (NO) and a normally closed (NC) contact. One end of these
contacts is common. Normal states of the relay contacts are shown on the figure at the beginning of
the “Communication Interfaces” section.
Relay functions are described below:
Relay Function
ACFR (AC Failure Relay)
Contacts change position if the RMS value or frequency of the mains
voltage is beyond their limits.
BYPR (Bypass Relay)
Contacts change position if the UPS is working in the Bypass mode.
BUVR (Battery Under Voltage Relay)
Contacts change position if the battery voltages are critically low to
feed the load and the load power is about to be interrupted.
SBFR (Secure Bus Failure Relay)
Contacts change position, if the output voltage disappears.