The Interface Solution Experts
5
CPT
PC-Programmable Signal
Isolater/Converter
Specifi cations and information subject to change without notice.
Specifi cations
Input Accuracy: Current,
±0.01% of max. span
(±2 microamps); Voltage,
±0.01% of max. span
(±1mV)
Output Accuracy: Current,
±0.01% of max span (±2
microamps); Voltage,
±0.01% of max. span
(±1mV)
Overall Accuracy: The
overall accuracy of the unit
is the combined input and
output (if any) accuracies.
It includes the combined
effects of linearity,
hysteresis, repeatability,
and adjustment resolution.
It does not include
ambient temperature
effect Mimimum Span
at Specifi ed Accuracy:
Current, 4mA; Voltage, 1V
Stability: See Table 1
Response Time: 256msec
maximum (128msec typical)
for the output to change
from 10 to 90% of its scale
for an input step change of
0 to 100%
Ripple: 50mVp-p
maximum on voltage output;
10mVp-p measured across
a 250 ohm load resistor for
current output (Frequencies
up to 120Hz)
Output Limiting:
Input over range, -0.2V/0mA
and 10.5V/21.4mA; Input
failure, -0.5V/0mA and
11V/24mA
Output Current
Limiting: 25mA max.
Load Effect: 0.01% of
span from 0 to maximum
load resistance
Maximum Load
Resistance: 1kohm
Line Voltage Effect:
±0.002% of span per 1%
change in line voltage
(ac or dc)
Isolation: Standard
unit, 1000Vrms between
case, input and output.
1500Vrms between power
and input and between
power and output; Unit
with -RF option, 500Vrms
between case, input,
output and power
Power Consumption:
2.5W typical, 3W max.
Power Supply Effect:
±0.002% of span per 1%
of line change
Input Impedance:
20ohms for current inputs;
1.1Mohm for voltage
inputs
Input Over-Range
Protection: ±100mA for
current inputs; ±30Vdc for
voltage inputs
WITH ALARM TRIP
OUTPUT:
Alarm Trip
Repeatability: Current,
±0.01% of max. span
(±2microamps); Voltage,
±0.01% of max. span
(±1 mV)
Response Time:
300msec (Defi ned as time
from step change on input
to alarm state change
when alarm is set to trip
midpoint)
Alarm Deadband:
Programmable from
0-100% of input range
Alarm Trip Delay:
0-120 seconds
LED Type: INPUT LED:
Dual color LED indicates
input failure
READY LED: Green LED
indicates unit is operating
properly
ALARM 1 LED: Dual color
LED indicates alarm status
Operating & Storage
Range: -40°C to +85°C
(-40°F to +185°F)
Relay Range: -25°C to
+70°C (-13°F to +158°F)
Relative Humidity:
0-95%, non-condensing
Ambient Temperature
Effect: ±0.015% of
maximum span/°C
RFI/EMI Immunity
(Standard Unit):
10V/m@20-1000MHz,
1kHz when tested
according to
IEC1000-4-3-1995 with
0.5% of span or less error
RFI Immunity (with -RF
Option):
30V/m@20-1000MHz, 1kHz
AM when tested according
to IEC1000-4-3-1995 with
0.5% of span or less error
Noise Rejection:
Common mode:
100dB@50/60Hz;
Normal Mode: Current
Input, 100dB typical at
50mAp-p@50/60Hz;
Voltage Input, 100dB typical
at 1Vp-p@50/60Hz
535 g (17.2 oz)
Performance
Indicators
Ambient
Conditions
Weight
Performance
with Alarm
Trip (-C
Option)
Performance
(continued)
Table 1. Long-Term Stability
Current Inputs
Voltage Inputs
Input-to-Analog
Output (Years)
Input-to-Relay
Output (Years)
Stability
(% of maximum
span)
1
0.081
0.093
3
0.14
0.16
5
0.18
0.21
1
0.047
0.066
3
0.081
0.114
5
0.105
0.147
