Eaton IQ 250, User & Installation Manual

Page: 63 / 142

Chapter 7:
IQ 250/260 Meter Using the I/O Option Cards
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IB02601006E
7-9
20mA Output Card (IQ250/260-IO4)
The 20mA card transmits a standardized 0-20 mA signal. This signal is linearly proportional to real-time quantities
measured by the IQ 250/260.
The current sources need to be loop powered.
The outputs are electrically isolated
from the main unit.
Specifications
The technical specifications at 25° C at 500
Ω
load are as follows:
Number of outputs: 4 single ended
Power consumption: 1W internal
Signal output range: (0 to 24)mA
Max. load impedance: 850 Ω @ 24VDC
Hardware resolution: 12 bits
Effective resolution: 14 bits with 2.5kHz PWM
Update rate per channel: 100ms
Output accuracy: ± 0.1 % of output range (24mA)
Load regulation: ± 0.03 % of output range (24mA) load step of 200Ω @ 20mA
Temperature coefficient ± 300n A/°C
Isolation: AC 2500V system to outputs
Maximum loop voltage: 28Vdc max
Internal voltage drop: 3.4VDC @ 24mA
Reset/Default output value: 12mA
The general specifications are as follows:
Operating temperature: (-20 to +70) °C
Storage temperature: (-40 to +80) °C
Relative air humidity: Maximum 95%, non-condensing
EMC - Immunity interference: EN61000-4-2
Weight: 1.6oz
Dimensions (inch) W x H x L: 0.72 x 2.68 x 3.26
External connection: AWG 12-26/(0.129 - 3.31)mm2
5 pin, 0.200” pluggable terminal block
Default Configuration:
The IQ 250/260 automatically recognizes the installed option card during Power Up. If you have not programmed a
configuration for the card, the unit will default to the following outputs:
Channel 1
+Watts, +1800 Watts => 20mA
-Watts, -1800 Watts => 4mA
0 Watts => 12mA
Channel 2
+VARs, +1800 VARs => 20mA
- VARs, -1800 VARs => 4mA
0 VARs => 12mA
Channel 3
Phase A Voltage WYE, 300 Volts => 20mA
0 Volts => 4 mA
Phase A Voltage Delta, 600 Volts => 20mA
Channel 4
Phase A Current, 10 Amps => 20mA
0 Phase A Current, 0 Amps => 4 mA