InteliATS
NT
PWR, SW version 2.5, ©ComAp – May 2015 109
IA-NT- PWR-2.5-Reference Guide.pdf
Mains and generator
Nominal frequency 50–60Hz
Frequency measurement tolerance 0.2Hz
Current inputs
Nominal input current (from CT) 5 A
Load (CT output impedance) < 0.1
CT input burden < 0.2 VA per phase (In=5A)
Max. measured current from CT 10 A
Current measurement tolerance 2 % from the Nominal current
Max. peak current from CT 50 A / 1s
Max. continuous current 10 A
Voltage inputs
Measuring voltage range 0 – 277 VAC phase to neutral
0 – 480 VAC phase to phase
Maximal measured voltage 340 VAC phase to neutral
600 VAC phase to phase
Input resistance 0.6 M phase to phase
0.3 M phase to neutral
Voltage measurement tolerance 2 % from the Nominal voltage
Overvoltage class III / 2 (EN61010)
Impulse voltage (Uimp) 4 kV
Binary inputs and outputs
Binary inputs
Not electrically separated
Number of inputs 7
Input resistance 4.2 k
Input range 0-36 VDC
Switching voltage level for close contact indication 0–2 V
Max voltage level for open contact indication 8–36 V
Binary open collector outputs
Not electrically separated
Number of outputs 7
Maximum current 0.5 A
Maximum switching voltage 36 VDC
IL-NT RS232 interface (optional card)
Plugs into IA-NT controller COMMUNICATION MODULE port.
Maximal distance 10m
Maximum speed Up to 57.6 kBd (DIRECT), 38.4kBd Analog
modem, 9.6 kBd digital modem, 57.6 kBd
(MODBUS)
Recommend external converter:
ADVANTECH – ADAM 4520: RS232 to RS422/485 converter, DIN rail, automatic RS485 bus
supervision, no external data flow control signals, galvanic isolated.
Recommended internal converter:
ADVANTECH – PCL-745B or PCL745S: Dual port RS422/485 Interface card, automatic RS485 bus
supervision, no external data flow control signals, galvanic isolated
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