PC-Programmable Current/Voltage
CPA
and RTD/Thermocouple Limit Alarm Trips
June 2009
Description
The universal CPA PC-Programmable Alarms provide
on/off control, warn of unwanted process conditions,
and provide emergency shutdown. Very economical,
they accept a direct signal input from transmitters,
temperature sensors, and a wide array of other
monitoring and control devices:
• Current and Voltage Signals
• 23 RTD Types
• 9 Thermocouple Types
• Resistance and Potentiometer Devices
• Direct Millivolt Sources The CPA PC-Programmable Alarm features a metal, RFI
resistant housing that snaps onto standard DIN-style rails.
Single or Dual Alarm Trip Outputs
The 4-wire (line/mains-powered) CPA provides one
or two alarm relay outputs when a monitored process
Features
• Universal plant standard. There’s no need to
variable falls outside of user-set high and/or low
stock dozens of different fixed range alarm trips.
limits. This is typically used to activate a warning
light, annunciator, bell, or shutdown system. • 20-bit input resolution. Delivers industry-
best digital accuracy for both sensor (RTD and
thermocouple) and analog (current/voltage) inputs.
• PC-programmable with Windows® software.
From a single screen, you can choose, and then
view to confirm, all of your application specific
Figure 1. Available CPA models deliver versatile and
programmable input and output choices. operating parameters from a PC.
• Long-term stability. Provides up to 5 years
Programmable Programmable
Input Output between scheduled calibrations.
mA Single Relay
CPA
COMPUTER
V
PROGRAMMABLE
ALARM Dual Relay • Combined alarm trip and transmitter. The
INPUT
analog output (-AO) option reduces costs and
RTD READY
(Trip Points, installation time when both alarm and transmitter
T/C High Alarm, Low
ohms
ALARM 1
Alarm, Failsafe,
functions are needed at the same location.
ALARM 2
mV Non-Failsafe,
Normally Open, • Isolated and RFI/EMI protection. Delivers
COM Normally Closed) superior protection against the effects of ground
loops and plant noise, and radio frequency and
Analog Output
(optional)
electromagnetic interference.
Certifications*
4-Wire (Line/Mains) Powered CE Conformant – EMC Directive 89/336/EEC
24Vdc, 117Vac, 230Vac EN 61326; Low Voltage Directive 73/23/EEC EN 61010
2009 Moore Industries-International, Inc. Page 1
225-710-01B
CPA
PC-Programmable Current/Voltage
and RTD/Thermocouple Limit Alarm Trips
One Window. One Minute. Figure 2. The CPA programs quickly from a single software window.
One Setup.
All operating parameters configure quickly and
easily using our Intelligent PC Configuration
Software. Programmable functions include:
• Input type and measurement range (zero
and full scale values)
• Input and output trimming
• High or low alarm(s) with trip points
• Failsafe or non-failsafe and normally open
or normally closed alarm relays
• Alarm deadband (0-100%) and alarm time
delay (0-120 seconds)
• T/C reference junction compensation (on/off) Programmable Process and Fault Alarms
Each individually-configurable CPA alarm trip relay
• Standard and custom linearization curves programs via the PC software as a:
• Analog output range* High or Low Process Alarm
Monitor a temperature, pressure, level, flow, position
• On input failure, upscale or downscale drive, fail or status variable, and use to warn of unwanted
to last value, or fail to selected value* process conditions, provide on/off control or provide
emergency shutdown.
• Analog signal output damping (0-120 seconds)*
Input Fault Alarm
*Models with Analog Output (-AO) option. Setting one of the CPA’s relays to trip on input or
self-diagnostic failure (without affecting the other
relay being used to monitor the process) is typically
implemented to warn of a failure, such as a broken
Powers a 2-Wire Transmitter sensor, without tripping more critical process alarms
The CPA (HLPRG: current/voltage input model) or shutting down the process.
comes standard with 2-wire transmitter excitation
that provides 24Vdc to power the loop. This saves Self-Diagnostic Alarm
the cost of specifying and installing an additional The CPA checks its own operation and configuration
instrument power supply. upon start up, and then continuously monitors its
status during operation. One of the CPA’s relays can
be configured to trip if it senses that it is not operating
Figure 3. The CPA provides transmitter excitation to power a
2-wire transmitter.
properly.
Loop CPA Quick Ranging Calibration
Power (HLPRG Using the PC software (instead of potentiometers
+ +TX Input)
which can drift), precise zero and span settings can
2-Wire 4-20mA 24Vdc be made in seconds. Just select the zero and span
Transmitter Power values, and a push of a button on the PC keyboard
Input locks the values into the CPA’s memory.
– +IN
Page 2
PC-Programmable Current/Voltage
CPA
and RTD/Thermocouple Limit Alarm Trips
Combination Alarm and Figure 5. When ordered with the Analog Output (-AO) option, the
CPA is a combination alarm trip and signal transmitter.
Isolated Transmitter
When ordered with the Analog Output (-AO) option,
the CPA provides a proportional and isolated analog Programmable Programmable
Input Alarm Trip(s)
retransmission of the input signal that can be sent to CPA
COMPUTER
PROGRAMMABLE
mA
ALARM
remote monitoring/control devices like a DCS, PLC, V INPUT
PC, indicator, or data recorder. All analog param- READY
Isolated
ALARM 1
eters can be selected using the CPA Intelligent PC RTD ALARM 2
Analog
Configuration Software. T/C Output
ohms Any Range
Upon input failure, the analog output can be mV
COM
Between 0-20mA
user-set for upscale or downscale drive, fail to last
value, or fail to selected value.
Custom 128-Point Linearization Curves Trim to Specific Curve Segments
The ability to plot a custom linearization curve is The CPA can be trimmed with two data points
beneficial when non-linear input signals must be within the selected zero and span measurement
converted to linear output representations. Typical range. This allows a complete process range to be
applications include monitoring a non-linear monitored, while placing measurement emphasis on
transducer, the level of odd-shaped tanks, and flow a critical segment of the range.
meter linearization. In the figure below, the ideal RTD curve is
optimized between 20°C and 27°C to match the curve
Figure 4. Custom linearization points can be selected and saved in of the sensor used. This provides incredible precision
the CPA’s memory to compensate for non-linear input signals.
over a limited portion of the span, while measuring
Output = Function of the Input
the remainder of the span with outstanding accuracy.
Full
100%
Scale
(20mA, 100%)
Figure 6. The CPA can be set to measure the segment most
(16mA, 87%) critical to the process.
75%
(12mA, 70%)
100
98
IDEAL RTD CURVE
% Display
50%
(USED BY DEFAULT)
(8mA, 50%)
(6mA, 35%) ˚C ACTUAL
SENSOR
25% Custom CURVE
Linearization
27
Points Full CAPTURED
0%
Scale 20 20˚C-27˚C
UPPER TRIM
4mA 8mA 12mA 16mA 20mA 1 POINT #2
Input mA 0 LOWER TRIM
POINT #1
Lower Full
Superior Cold Junction Compensation (Zero) (High)
Range Range
Uncompensated plastic terminals are very susceptible
to ambient temperature changes that may result
in readings that are “off” by several degrees. CPA Total Sensor Diagnostics for RTD Inputs
models that accept temperature inputs (TPRG input) If the RTD input breaks, the user can decide whether
feature metal terminals and advanced electronic or not to trip one alarm to indicate trouble. A plain-
compensation techniques that provide a stable English error message on the PC software indicates
measurement in fluctuating ambient temperature exactly which RTD wire has broken. Specific error
conditions. messages eliminate the work of removing the sensor
or checking all lead wires to diagnose a problem.
Page 3
CPA
PC-Programmable Current/Voltage
and RTD/Thermocouple Limit Alarm Trips
Specifications (HLPRG: mA and V Input Model)
Performance Alarm Trip Repeatability: Performance Power Consumption: Indicators LED Type: INPUT LED:
Current, ±0.01% of max. (continued) 3W typical, 4W max. Dual color LED indicates
span (±2 microamps); Power Supply Effect: input failure
Voltage, ±0.01% of max. ±0.002% of span per 1% of READY LED: Green LED
span (±1mV) line change indicates unit is operating
Input Accuracy: Current, Input Impedance: properly
±0.01% of max. span 20ohms for current inputs; ALARM 1 and ALARM 2
(±2 microamps); Voltage, 1.1Mohm for voltage inputs LED: Dual color LED per
±0.01% of max. span Input Over-Range relay indicates alarm status
(±1mV) Protection: ±100mA for
Overall Accuracy: The current inputs; ±30Vdc for Ambient Operating & Storage
overall accuracy of the unit voltage inputs Conditions Range: -40°C to +85°C
is the combined input and (-40°F to +185°F)
output (if any) accuracies. Performance WITH ANALOG OUTPUT: Relay Range: -25°C to
It includes the combined with Analog Output Accuracy: +70°C (-13°F to +158°F)
effects of linearity, Output (-AO Current, ±0.01% of max Relative Humidity:
hysteresis, repeatability, Option) span (±2 microamps); 0-95%, non-condensing
and adjustment resolution. Voltage, ±0.01% of max. Ambient Temperature
It does not include ambient span (±1mV) Effect: ±0.015% of
temperature effect Minimum Output Span: maximum span/°C
Minimum Input Span Current,4mA; Voltage, 1V RFI/EMI Immunity
at Specified Accuracy: Response Time: (Standard Unit):
Current,4mA; Voltage, 1V 256msec maximum 10V/M@20-1000MHz,
Stability: See Table 1 (128msec typical) for the 1KHz when tested
Response Time: output to change from 10 according to
300msec (Defined as time to 90% of its scale for an IEC1000-4-3-1995 with
from step change on input input step change of 0 to 0.5% of span or less error
to alarm state change when 100% RFI Immunity (with -RF
alarm is set to trip midpoint) Ripple: 50mVp-p Option):
Alarm Deadband: maximum on voltage 30V/M@20-1000MHz,
Programmable from output; 10mVp-p measured 1KHz AM when tested
0-100% across a 250 ohm load according to
Alarm Trip Delay: resistor for current output IEC1000-4-3-1995 with
0-120 seconds (Frequencies up to 120Hz) 0.5% of span or less error
Line Voltage Effect: Output Limiting: Noise Rejection:
±0.002% of span per 1% Input over range, Common mode:
change in line voltage -0.2V/0mA and 100dB@50/60Hz;
(ac or dc) 10.5V/21.4mA; Input Normal Mode: Current
Isolation: Standard unit, failure, -0.5V/0mA and Input, 100dB typical at
1000Vrms between case, 11V/24mA 50mAp-p@50/60Hz;
input and output. Output Current Limiting: Voltage Input, 100dB typical
1500Vrms between power 25mA max. at 1Vp-p@50/60Hz
and input and between Load Effect (current
power and output.; Unit outputs): 0.01% of span Weight 653 g (21 oz)
with -RF option, 500Vrms from 0 to maximum load
between case, input, output resistance on current
and power output
Maximum Load
Resistance: Current
outputs, 1Kohm; Voltage
outputs, 2Kohms
Table 1. Long-Term Stability for HLPRG (mA and V) Input Model.
Stability Input-to-Analog Input-to-Relay
(% of maximum Output (Years) Output (Years)
span)
1 3 5 1 3 5
Current Inputs 0.081 0.14 0.18 0.047 0.081 0.105
Voltage Inputs 0.093 0.16 0.21 0.066 0.114 0.147
Page 4
PC-Programmable Current/Voltage
CPA
and RTD/Thermocouple Limit Alarm Trips
Specifications (TPRG: RTD, T/C, Ohm, mV and Pot Input Model)
Performance Alarm Trip Repeatability: Performance Input Impedance: T/C Indicators LED Type: INPUT LED:
See Table 4 on Page 6 (continued) and mV inputs, 40Mohms, Dual color LED indicates
Input Accuracy: nominal input failure
See Table 4 on Page 6 Input Over-Range READY LED: Green LED
Overall Accuracy: The Protection: ±5Vdc indicates unit is operating
overall accuracy of the unit Excitation Current (RTD properly
is the combined input and and Ohm Inputs Only): ALARM 1 & ALARM 2 LED:
output (if any) accuracies. 250microamps, ±10% Dual color LED per relay
It includes the combined indicates alarm status
effects of linearity, Performance WITH ANALOG
hysteresis, repeatability, with Analog OUTPUT: Ambient Operating & Storage
and adjustment resolution. Output (-AO Output Accuracy: Conditions Range: -40°C to +85°C
It does not include ambient Option) Current, ±0.01% of max. (-40°F to +185°F)
temperature effect span (±2 microamps) Relay Range: -25°C to
Mimimum Span at Voltage, ±0.01% of max. +70°C (-13°F to +158°F)
Specified Accuracy: span (±1mV) Effect of Ambient
See Table 4 on Page 6 Response Time: Temperature on Cold
Cold Junction 256msec maximum Junction Compensation
Compensation Accuracy (128msec typical) for the (T/C Inputs Only):
(T/C Inputs Only): ±0.45°C output to change from 10 ±0.005°C per °C change of
Stability: See Table 2 to 90% of its scale for an ambient temperature
Response Time: input step change of 0 to Relative Humidity:
300msec (Defined as time 100% 0-95%, non-condensing
from step change on input Ripple: 50mVp-p Ambient Temperature
to alarm state change when maximum on voltage Effect: ±0.015% of
alarm is set to trip midpoint) output; 10mVp-p maximum span/°C
Alarm Deadband: measured across a RFI/EMI Immunity
Programmable from 250 ohm load resistor (Standard Unit):
0-100% for current output. 10V/M@20-1000MHz,
Alarm Trip Delay: (Frequencies up to 1KHz when tested
0-120 seconds 120Hz) according to
Line Voltage Effect: Output Limiting: IEC1000-4-3-1995 with
±0.002% of span per 1% Input over range, 0.5% of span or less error
change in line voltage -0.2V/0mA and RFI Immunity (with -RF
(ac or dc) 10.5V/21.4mA; Input Option):
Isolation: Standard unit, failure, -0.5V/0mA and 30V/M@20-1000MHz,
1000Vrms between case, 11V/24mA 1KHz AM when tested
input and output. 1500Vrms Output Current Limiting: according to
between power and input 25mA max. IEC1000-4-3-1995 with
and between power and Load Effect (current 0.5% of span or less error
output; Unit with -RF option, outputs): 0.01% of span Noise Rejection: Common
500Vrms between case, from 0 to maximum load mode,
input, output and power resistance on current 100dB@50/60Hz;
Power Consumption: output Normal Mode, See Table 3
3W typical, 4W max. Maximum Load
Power Supply Effect: Resistance: Current Weight 653 g (21 oz)
±0.002% of span per 1% of outputs, 1Kohms; Voltage
line change outputs, 2Kohms
Table 2. Long-Term Stability for TPRG (RTD, T/C, mV, ohm, Pot) Input Model. Table 3. Normal Mode Rejection Ratio Table.
Input-to-Relay Sensor Type Max. p-p Voltage Injection for
Stability Input-to-Analog 100dB at 50/60Hz
(% of maximum Output (Years) Output (Years) T/C: J, K, N, C, E 150mV
T/C: T, R, S, B 80mV
span) 1 3 5 1 3 5 Pt RTD: 100, 200, 300 ohms 250mV
Pt RTD: 400, 500, 1000 ohms 1V
RTD, Ohm, & Pot Inputs 0.066 0.114 0.147 0.47 0.081 0.104 Ni: 120 ohms 500mV
Cu: 9.03 ohms 100mV
Resistance mV
T/C & mV Inputs 0.047 0.082 0.106 0.008 0.014 0.019 1-4kohms 250-1000 1V
0.25-1kohms 62.5-250 250mV
0.125-0.25kohms 31.25-62.5 100mV
Specifications and information subject to change without notice. Page 5
CPA
PC-Programmable Current/Voltage
and RTD/Thermocouple Limit Alarm Trips
Table 4. Accuracy with RTD, Thermocouple, Ohms, and Millivolt Inputs (Models with TPRG Input).
Input Type α Ohms Conformance
Range
Minimum
Span
Input
Accuracy/Repeatability
Maximum
Range
RTD 100
(2-, 3-,
4-Wire) 200
300
-200 to 850°C -240 to 960°C
0.003850 -400 to 1760°F
-328 to 1562°F
400
500
1000
Platinum
10°C ±0.1°C
100
(18°F) (±0.18°F)
200
-100 to 650°C -150 to 720°C
0.003902 400
-148 to 1202°F -238 to 1328°F
500
1000
-200 to 510°C -240 to 580°C
0.003916 100
-328 to 950°F -400 to 1076°F
-80 to 320°C -100 to 360°C
Nickel 0.00672 120
-112 to 608°F -148 to 680°F
-50 to 250°C ±0.85°C -65 to 280°C
Copper 0.00427 9.035
-58 to 482°F (±1.53°F) -85 to 536°F
Direct Resistance 0-4000 0-4000ohms 10ohms ±0.4ohms 0-4000ohms
Ohms n/a
Potentiometer 4000 max. 0-100% 10% ±0.1% 0-100%
-180 to 760°C 35°C ±0.25°C -210 to 770°C
T/C J n/a n/a
-292 to 1400°F 63°F (±0.45°F) -346 to 1418°F
-150 to 1370°C 40°C ±0.3°C -270 to 1390°C
K n/a n/a
-238 to 2498°F 72°F (±0.54°F) -454 to 2534°F
-170 to 1000°C 35°C ±0.2°C -270 to 1013°C
E n/a n/a
-274 to 1832°F 63°F (±0.36°F) -454 to 1855.4°F
-170 to 400°C 35°C ±0.25°C -270 to 407°C
T n/a n/a
-274 to 752°F 63°F (±0.45°F) -454 to 764.6°F
0 to 1760°C 50°C ±0.55°C -50 to 1786°C
R n/a n/a
32 to 3200°F 90°F (±0.99°F) -58 to 3246.8°F
0 to 1760°C 50°C ±0.55°C -50 to 1786°C
S n/a n/a
32 to 3200°F 90°F (±0.99°F) -58 to 3246.8°F
400 to 1820°C 75°C ±0.75°C 200 to 1836°C
B n/a n/a
752 to 3308°F 135°F (±1.35°F) 392 to 3336.8°F
-130 to 1300°C 45°C ±0.4°C -270 to 1316°C
N n/a n/a
-202 to 2372°F 81°F (±0.72°F) -454 to 2400.8°F
0 to 2300°C 100°C ±0.8°C 0 to 2338°C
C n/a n/a
32 to 4172°F 180°F (±1.44°F) 32 to 4240.4°F
mV DC n/a n/a -50 to 1000mV 4mV 15 microvolts -50 to 1000mV
Page 6
PC-Programmable Current/Voltage
CPA
and RTD/Thermocouple Limit Alarm Trips
Ordering Information
Unit Input Output Power Options Housing
CPA HLPRG 1PRG Single Relay 24DC ±10% -AO Analog DIN Universal
PC-Programmable Programs to accept: (Relay is double-pole/ 117AC ±10% output (isolated DIN-style
Limit Alarm Trip double-throw (DPDT, 2 230AC ±10% and linearized) housing mounts
Current: Any range form C, rated 5A@250Vac, scaleable for on 32mm
between 0-50mA 50/60Hz, non-inductive) Current output (EN50035)
including: 2.4mA minimum G-type
0-20mA 2PRG Dual Relays or for Voltage and 35mm
4-20mA (Relays are output 1Vdc (EN50022) Top
10-50mA single-pole/double-throw minimum (see Hat DIN-rails
(SPDT, 1 form C, rated “Specifications”
Voltage: Any range 5A@250Vac, 50/60Hz, for additional
between 0-10Vdc non-inductive) information)
including: NOTE: Output
0-5Vdc Each relay individually can be user-set
1-5Vdc configures for: for internal or
0-10Vdc High or Low Trip external power
Normally Open or (source or sink)
TPRG Programs to Normally Closed -RF Enhanced
accept (see Table 3 on Failsafe or Non-Failsafe RFI/EMI
Page 6 for details): protection (see
“Specifications”
RTD: 2-, 3-, and for details)
4-wire; platinum, copper,
and nickel
Thermocouple:
J, K, E, T, R, S, N, C, B
Ohms:
0-4000ohms
(Potentiometer,
4000 ohms maximum)
Millivolts:
–50 to +1000mV
When ordering, specify: Unit / Input / Output / Power / Options [Housing]
Model number example: CPA / TPRG / 2PRG / 117AC / - AO -RF [DIN]
Accessories
Part Number Moore Industries’ Interface Solution Configuration
750-75E05-01 and Installation CD (One copy of CD provided free
with each order)
Part Number Configuration Communications Cable for use
803-053-26 in connecting the instrument to the PC (one cable
provided free with each order)
Part Number USB Communications Cable for use in connecting
208-836-00 the instrument to the PC (optional cable)
All product names are the trademarks of their respective companies.
Page 7
CPA
PC-Programmable Current/Voltage
and RTD/Thermocouple Limit Alarm Trips
Figure 7. Installation Dimensions.
126mm
50mm (4.97 in)
(1.97 in) 100mm
(3.96 in)
NOTE: While all CPA models (model with
HLPRG input shown) are dimensionally
identical, the CPA that accepts temperature
CPA inputs (TPRG input) features metal
COMPUTER
PROGRAMMABLE
terminal blocks for enhanced cold junction
ALARM
INPUT
compensation.
READY
100mm
ALARM 1
(3.94 in)
ALARM 2
COM
Table 5. Terminal Designations.
Top Terminals (Left to Right)
Input Type
T1 T2 T3 T4 T5 T6 T7 T8 T9
Not Not +IO –IO Source –VO
Current Input (HLPRG) Tx +I COM
Used Present Source +IO Sink
+VO
–IO Sink
Not Not +IO –IO Source –VO
Voltage Input (HLPRG) Tx
Used
COM +V
Present Source +IO Sink
+VO
–IO Sink
Not +IO –IO Source –VO
RTD, Ohm & Pot Input (TPRG) See Figure 8
Present Source +IO Sink +VO
–IO Sink
Not +IO –IO Source –VO
T/C & mV Input + – Present Source +IO Sink +VO –IO Sink
Bottom Terminals (Left to Right)
Output Type/Power
B1 B2 B3 B4 B5 B6 B7 B8 B9
Single Alarm (DPDT Relay) NO1 CM1 NC1 NO2 CM2 NC2 AC/DC ACC/DCC GND
Relay 1 Relay 1 Relay 1 Relay 2 Relay 2 Relay 2
Dual Alarms (SPDT Relays) NO1 CM1 NC1 NO2 CM2 NC2
AC/DC ACC/DCC GND
NOTES:
1. Terminal blocks can accomodate 14-22 AWG KEY:
solid wiring. AC/DC = Power Input IO = Current Output Source = Current Source
2. ±IO/±VO labeling is present only when the unit ACC/DCC = Power Input NO = Normally Open SPDT = Single-Pole/Double-Throw
is equipped with the Analog Output (-AO) option. CM = Relay Common NC = Normally Closed VO = Voltage Output
COM = Analog Common Sink = Current Sink
DPDT = Double-Pole/Double-Throw
GND = Ground
Figure 8. Temperature Sensor Hook-Up Guide (Models with TPRG Input).
Thermocouple 2-Wire RTD 3-Wire RTD 4-Wire RTD Potentiometer
and Millivolt or Decade or Decade or Decade Input
Input Resistance Box Resistance Box Resistance Box
+ –
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
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Page 8