Page 1
AP4351-2000
Action PAK
®
AP4351
Thermocouple-Input,
Field Configurable Isolator
Provides Isolated, Linearized DC Output
in Proportion to Thermocouple Input
Field Configurable Thermocouple Types
Linearized Outputs
Wide-Ranging Zero and Span Adjustability (50%)
Description
The AP4351 isolating thermocouple conditioner offers wide ranging input and output capability. The AP4351 can be field configured by the user to accept input from thermocouple types J, K, T,
R, S, E, and B and to provide current or voltage output. The output
is linearized to temperature according to the particular thermocouple type.
The AP4351 is a three-port industrial isolator — the output is
optically isolated from the input up to 1500V, and both input and
output are transformer isolated from the line power. Isolation
allows the noise reduction benefits of grounded thermocouples to
be realized without creating ground loop problems and it provides
faster response. The AP4351 utilizes the latest in advanced analog/
digital signal processing technology. In addition to its multiple
microprocessors, it employs special ASIC circuitry for high accuracy and reliability.
The AP4351 is equipped with cold-junction compensation (CJC)
circuitry to provide ice-point reference. Upscale, downscale or
disabled thermocouple burnout detection is switch selectable.
Eliminates Ground Loops
Thermocouple Burnout Detection
ASIC Technology for Enhanced Reliability
8Hz for under/over range, respectively. If the thermocouple is
within the full temperature range, but outside the selected sub-
range (for example, if a type J thermocouple is set for range 13 and
the temperature is either below 375°C or above 500°C) the LED
will flash at 0.5 or 1Hz respectively.
Cal OK LED
This LED is continuously on when the device is properly storing the
factory calibration reference voltage.
Trouble LED
This LED is off during normal operation of the device. If this LED
is on contact
Options
U Urethane coating of internal circuitry for protection from
corrosive atmospheres.
C620 Factory calibration (specify input thermocouple type,
temperature range and output).
Application
The Action Pak Model AP4351 is useful in any application requiring
an isolated DC output from a thermocouple input. Typical applications include energy management and data acquisition of
process temperatures. The output of the AP4351 can drive a digital
meter for direct display or interface with a computer for monitoring and control applications.
Status LEDs
Model AP4351 is equipped with top-mounted LEDs for INPUT
(green), TROUBLE (yellow) and CAL OK (yellow). At start-up, both
the INPUT and the CAL OK LEDs light up momentarily for 1 second.
Afterwards, these LEDs flash alternately for 10 seconds while startup takes place.
Input LED
This input LED is a diagnostic tool. It remains continuously lit if the
measured temperature is within the selected range of the thermocouple. However, if the measured temperature is outside the full
range of the thermocouple (for example, for a type J - below
minus 200°C or above 750°C), the LED will flash at a rate of 4 or
Configuration
A major advantage of the AP4351 is its wide ranging capabilities
and ease of configuration. The AP4351 enables 50% input zero and
span adjustability within the selected sub-range.
For example, range #5 for an E-Type thermocouple in Table 6
specifies -18°C to 125°C. Since the span can be contracted by 50%,
this enables an input span as narrow as 50% of 143°C, or 72°C. This
span can then be positioned anywhere within the temperature
range and can have a zero step-up as large as 50% of the full scale
range (e.g. span can start as high as 53°C).
Unless otherwise specified, the factory pre-sets the Model AP4351
as follows:
Input:
Range: 0-500°C
Output: 4-20mA
Burn Out: Upscale
J-type
Page 2
For other settings, remove the four base screws and polycarbonate case to access the configuration switches.
2. Set the calibrator to the desired minimum input and adjust the
zero potentiometer for the desired minimum output.
Refer to Tables 1 through 6 and Figures 1 through 3 for the proper
switch locations and settings. Using the switch on the input board
select thermocouple type, temperature range, and thermocouple
burnout detection. Using the switch on the output board, select
desired type of output. Replace the case prior to applying power
to the unit.
Calibration
1. Connect the input to a calibrated thermocouple source and
apply power. Wait 1-2 hours for thermal stability before monitoring the voltage/current output. Refer to PIN CONNECTIONS.
Table 1: Thermocouple type switch settings
(SW 1 on Input Board)
Table 2: Thermocouple burnout detection
switch settings
(SW 1 on Input Board)
Table 3: Range switch settings used in
conjunction with Table 6
(SW 1 on Input Board, SW1-3 is not used)
3. Set the calibrator to the desired maximum input and adjust the
span potentiometer for the desired maximum output.
4. Repeat steps 2 and 3, as necessary, for best accuracy.
Installation
Model AP4351 is pin-compatible with Action’s AP4100, AP4130,
AP4150, and AP4350, allowing for easy field upgrade.
Table 4: Output switch settings
(SW 1 on Output Board)
Table 5: AP 4351 Accuracy
Figure 1: Top View
Figure 2: Input Board Figure 3: Output Board
Page 3
egnaR
S,R
1C°0671ot05)F°0023ot221(
2C°0001ot05)F°2381ot221(
3C°005ot05)F°239ot221(
4C°052ot05)F°284ot221(
7C°0671ot0001)F°0023ot2381(
8C°0001ot005)F°2381ot239(
9C°005ot052)F°239ot284(
01C°052ot521)F°284ot752(
11C°0671ot0051)F°0023ot2372(
21C°0001ot057)F°2381ot2831(
31C°005ot573)F°239ot707(
T
3C°004ot81-)F°257ot0(
4C°052ot81-)F°284ot0(
5C°521ot81-)F°752ot0(
9C°004ot052)F°257ot284(
01C°052ot521)F°284ot752(
31C°004ot573)F°257ot707(
41C°004ot051-)F°257ot832-(
51C°052ot051-)F°284ot832-(
61C°0ot051-)F°23ot832-(
epyTCT
egnaR
rebmuNrebmuN
rebmuN
rebmuNrebmuN
egnaRerutarepmeT
epyTCT
rebmuNrebmuN
rebmuNrebmuN
rebmuN
6C°0281ot005)F°8033ot239(
7C°0281ot0001)F°8033ot2381(
B
8C°0001ot005)F°2381ot239(
11C°0281ot0051)F°8033ot2372(
21C°0001ot057)F°2381ot2831(
2C°0001ot81-)F°2381ot0(
3C°005ot81-)F°239ot0(
4C°052ot81-)F°284ot0(
5C°521ot81-)F°752ot0(
8C°0001ot005)F°2381ot239(
9C°005ot052)F°239ot284(
E
01C°052ot521)F°284ot752(
21C°0001ot057)F°2381ot2831(
31C°005ot573)F°239ot707(
41C°057ot051-)F°2831ot832-(
51C°052ot051-)F°284ot832-(
61C°0ot051-)F°23ot832-(
2C°057ot81-)F°2831ot0(
3C°005ot81-)F°239ot0(
4C°052ot81-)F°284ot0(
5C°521ot81-)F°752ot0(
8C°057ot005)F°2831ot239(
J
9C°005ot052)F°239ot284(
01C°052ot521)F°284ot752(
31C°005ot573)F°239ot707(
41C°057ot002-)F°2831ot823-(
51C°052ot002-)F°284ot823-(
61C°0ot002-)F°23ot823-(
Table 6: Thermocouple Range Settings
egnaRerutarepmeT
K
egnaR
epyTCT
rebmuNrebmuN
rebmuNrebmuN
rebmuN
1C°0731ot81-)F°8942ot0(
2C°0001ot81-)F°2381ot0(
3C°005ot81-)F°239ot0(
4C°052ot81-)F°284ot0(
5C°521ot81-)F°752ot0(
7C°0731ot0001)F°8942ot2381(
8C°0001ot005)F°2381ot239(
9C°005ot052)F°239ot284(
01C°052ot521)F°284ot752(
21C°0001ot057)F°2381ot2831(
31C°005ot573)F°239ot707(
41C°057ot002-)F°2831ot823-(
51C°052ot002-)F°284ot823-(
61C°0ot002-)F°23ot823-(
egnaRerutarepmeT
Mounting
All Action Paks feature plug-in installation. Model AP4351-2000 uses an
8-pin base and molded-sockets M008, or DIN-socket MD08.
Dimensions
Dimensions are in millimeters (inches)
Mark III
M008 (Track/Surface)
MD08 (DIN Rail)
Page 4
Specifications
r
Inputs:
Ranges: field configurable, see Table 6
Impedance: >1M Ohms
Input Bias Current (burnout detection):
<1.5 microamp
Overvoltage: ±10V differential
Common Mode (Input to Ground):
1500VDC or peak AC, max
Zero and Span Range:
Zero Turn-Up:
0 to 50% of full scale range
Span Turn-Down:
100 to 50% of full scale range
Outputs:
Voltage Output: field-configurable
Ranges: 0-5V, 0-10V
Impedance: <10 Ohms
Drive: 10mA, max. (1K Ohms, min.)
Current Output: field-configurable
Ranges: 0-1mA, 4-20mA
Impedance: >100K Ohms
Compliance: 10V, max. (500 Ohms, max. @ 20mA)
Accuracy (Including Linearity, Hysteresis):
see Table 5
Response Time(10-90%):
500 mSec, typical
Stability:
±0.04%/°C of full scale range
Isolation:
1500VDC or peak AC between input,
output and power
ESD Susceptibility:
Meets IEC 801- 2, Level 2 (4KV)
Common Mode Rejection:
DC - 60Hz: 120dB
LED Indicators:
TROUBLE LED: Yellow - off during normal
device operation
INPUT LED: Green - continuously on if
input is within selected range, flashes
otherwise
CAL OK LED: Yellow - continuously on in
normal device operation
Thermocouple Burnout Detect:
Field-configurable Up or Downscale, or
disabled
Humidity (Non-Condensing):
Operating: 25 to 95% (@ 45°C)
Soak: 90% for 24 Hrs. (@65°C)
Temperature Range:
Operating: 0 to 60°C (32 to 140°F)
Storage: -15 to 75°C (5 to 167°F)
Power:
Consumption: 3W typical, 5W max
Standard: 120VAC ±10%, 50 - 60Hz
Optional: 240VAC
Weight:
0.62lbs
Approvals:
UL recognized per standard UL508.
(FileNo. E99775).
CSA certified per standards C22.2 No.
M1982 (File No. LR42272-41).
Ordering Information
Specify:
1. Model: AP4351-2000
2. Option: C620 factory calibration (specify input thermocouple type,
temperature range and output).
3. Option: U, see text
4. Line Power, see specifications (All power supplies are transformerisolated from the internal circuitry)
Accessories:
M801-0000 Retaining Spring
M008-A 8 pin Track Mount Socket
M004-0000 4 ft Long Channel Track
MD08-0000 8 pin DIN Mount Socket
Printed on recycled pape
Action Instruments
Pin Connections
Chessell
1 Power (Hot)
2 No Connection
3 Power (Neu)
4 Do not use
5 Input (+)
6 Input (-)
7 Output (+)
8 Output (-)
Eurotherm
Loading...