Omega OM5-C User Manual

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TABLE OF CONTENTS

GENERAL DESCRIPTION .............................................................................................................. 2

OM5 SELECTION GUIDE ............................................................................................................... 2

ANALOG VOLTAGE INPUT MODULES, NARROW BANDWIDTH: OM5-IMV/IV ....................... 4

ANALOG CURRENT INPUT MODULES: OM5-II .......................................................................... 6

TRUE RMS INPUT MODULES: OM5-IAC ..................................................................................... 8

LINEARIZED 2- OR 3-WIRE RTD INPUT MODULES: OM5-IP/IC/IN ..............................................10

LINEARIZED 4-WIRE RTD INPUT MODULES: OM5-IP4/IC4/IN4.............................................. 12

POTENTIOMETER INPUT MODULES: OM5-PT ......................................................................... 14

THERMOCOUPLE INPUT MODULES: OM5-ITC ........................................................................ 16

STRAIN GAGE INPUT MODULES, WIDE BANDWIDTH: OM5-WBS ....................................... 16

ANALOG CURRENT OUTPUT MODULES: OM5-IVI ................................................................. 20

ANALOG VOLTAGE INPUT MODULES, WIDE BANDWIDTH: OM5-WMV/WV ....................... 22

2-WIRE TRANSMITTER INTERFACE MODULES: OM5-TX ............................................................ 24

GENERAL PURPOSE INPUT MODULES, DC EXCITATION: OM5-DT .................................... 26

FREQUENCY INPUT MODULES: OM5-IFI ................................................................................ 28

LINEARIZED THERMOCOUPLE INPUT MODULES: OM5-LTC ...................................................... 30

VOLTAGE OUTPUT MODULES, 50mA DRIVE CAPACITY: OM5-AV ...................................... 32

DIMENSIONS AND ACCESSORIES ............................................................................................ 34

1

OM5-WMV/WV

Analog Voltage Input Modules, Wide Bandwidth

FEATURES

● ACCEPTS MILLIVOLT AND VOLTAGE LEVEL SIGNALS

● HIGH LEVEL VOLTAGE OUTPUTS

● 1500Vrms TRANSFORMER ISOLATION

●

ANSI/IEEE C37.90.1-1989

● INPUT PROTECTED TO 240VAC CONTINUOUS

● 100dB CMR

● 10kHz SIGNAL BANDWIDTH

● ±0.05% ACCURACY

● ±0.02% LINEARITY

● ±1µV/°C DRIFT

● CSA CERTIFIED, FM APPROVED, CE COMPLIANT

● MIX AND MATCH OM5 TYPES ON BACKPANEL

TRANSIENT PROTECTION

DESCRIPTION

Each OM5 wide bandwidth voltage input module provides a single channel
of analog input which is amplified, isolated, and converted to a high level
analog voltage output (Figure 1). This voltage output is logic-switch
controlled, allowing these modules to share a common analog bus without
the requirement of external multiplexers.

The OM5 modules are designed with a completely isolated computer side
circuit which can be floated to ±50V from Power Common, pin 16. This
complete isolation means that no connection is required between I/O
Common and Power Common for proper operation of the output switch. If
desired, the output switch can be turned on continuously by simply
connecting pin 22, the Read-Enable pin to I/O Common, pin 19.

The input signal is processed through a pre-amplifier on the field side of
the isolation barrier. This pre-amplifier has a gain-bandwidth product of
5MHz and is bandwidth limited to 10kHz. After amplification, the input
signal is chopped by a proprietary chopper circuit. Isolation is provided by
transformer coupling, again using a proprietary technique to suppress
transmission of common mode spikes or surges. The module is powered
from +5VDC, ±5%.

A special input circuit provides protection against accidental connection of
power-line voltages up to 240VAC.

4

6

5

3

NC

NC

Suppression

Protection

1

2

V

IN

+EXC

–EXC

+In

–In

Backpanel

Term Block

4

3

2

1

FIGURE 1. OM5-WMV/WV Block Diagram.

Surge

and

Anti-Aliasing

+V

–V

Filter

Isolated

Field-Side

Power

Isochopper™

Amplifier

Pat Pending

–V

+V

Isolated

Computer-Side

Power

LPF

Power

Oscillator

20

V

19

I/O Common

22

RD EN\

17

+5V

16

Power Common

OUT

22

SPECIFICATIONS Typical at T

= +25°C and +5V Power.

A

Module OM5-WMV OM5-WV
Input Range ±10mV to ±100mV ±1V to ±40V

Input Bias Current ±0.5nA ±0.05nA
Input Resistance

Normal 200MΩ 650kΩ (minimum)
Power Off 40kΩ 650kΩ (minimum)
Overload 40kΩ 650kΩ (minimum)

Input Protection

Continuous 240Vrms Max *
Transient ANSI/IEEE C37.90.1-1989 *

CMV, Input to Output

Continuous 1500Vrms max *

Transient ANSI/IEEE C37.90.1-1989 *
CMR (50Hz or 60Hz) 100dB *
NMR (–3dB at 10kHz) 120dB per Decade above 10kHz *

(1)

Accuracy

±0.05% Span ±10µV RTI

Nonlinearity ±0.02% Span *

(2)

±0.05%(V

(3)

) ±0.05% span ±0.2mV RTI

Z

±0.05% (V

(3)

Z

(2)

)

Stability

Input Offset ±1µV/°C ±20µV/°C

Output Offset ±40µV/°C*

Gain ±25ppm/°C ±50ppm/°C
Noise

Input, 0.1 to 10Hz 0.4µVrms 2µVrms

Output, 100kHz 10mVp-p *
Bandwidth, –3dB 10kHz *
Rise Time, 10 to 90% Span 35µs*
Settling Time, to 0.1% 250µs*

Output Range ±5V or 0V to +5V *
Output Resistance 50Ω *
Output Protection Continuous Short to Ground *
Output Selection Time 6µs at C

(to ±1mV of V
Output Current Limit ±8mA *

)*

OUT

= 0 to 2000pF

load

Output Enable Control

Max Logic “0” +0.8V *

Min Logic “1” +2.4V *

Max Logic “1” +36V *

Input Current, “0”, “1” 0.5µA*

Power Supply Voltage +5VDC ±5% *
Power Supply Current 30mA *
Power Supply Sensitivity ±2µV/% RTI

(2)

±200µV/% RTI

(2)

Mechanical Dimensions 2.28" x 2.26" x 0.60" (58mm x 57mm x 15mm) *

Environmental

Operating Temp. Range –40°C to +85°C*

Storage Temp. Range –40°C to +85°C*

Relative Humidity 0 to 95% Noncondensing *
Emissions EN50081-1, ISM Group 1, *

Class A (Radiated, Conducted)

Immunity EN50082-1, ISM Group 1, Class A (ESD, RF, EFT) *

* Same specification as OM5­WMV.
NOTES: (1) Includes nonlinearity,
hysteresis and repeatability.
(2) RTI = Referenced to input.
(3) VZ is the input voltage
that results in 0V output.

ORDERING

INFORMATION

MODEL INPUT RANGE OUTPUT RANGE

OM5-WMV-10A-C –10mV to +10mV –5V to +5V
OM5-WMV-50A-C –50mV to +50mV –5V to +5V
OM5-WMV-100A-C –100mV to +100mV –5V to +5V
OM5-WMV-10B-C –10mV to +10mV 0V to +5V
OM5-WMV-50B-C –50mV to +50mV 0V to +5V
OM5-WMV-100B-C –100mV to +100mV 0V to +5V
OM5-WV-1A-C –1V to +1V –5V to +5V
OM5-WV-5A-C –5V to +5V –5V to +5V
OM5-WV-10A-C –10V to +10V –5V to +5V
OM5-WV-1B-C –1V to +1V 0V to +5V
OM5-WV-5B-C –5V to +5V 0V to +5V
OM5-WV-10B-C –10V to +10V 0V to +5V
OM5-WV-20A-C –20V to +20V –5V to +5V
OM5-WV-20B-C –20V to +20V 0V to +5V
OM5-WV-40A-C –40V to +40V –5V to +5V
OM5-WV-40B-C –40V to +40V 0V to +5V

23

OM5-TX

2-Wire Transmitter Interface Modules

FEATURES

● ISOLATED +20VDC CURRENT LOOP SUPPLY

● PROVIDES ISOLATION FOR NON-ISOLATED 2-WIRE

TRANSMITTERS

● HIGH LEVEL VOLTAGE OUTPUT: +1V to +5V or +2V to +10V

●

1500Vrms TRANSFORMER ISOLATION

● ANSI/IEEE C37.90.1-1989 TRANSIENT PROTECTION

● INPUT PROTECTED TO 240VAC CONTINUOUS

● 100dB CMR

● 100Hz SIGNAL BANDWIDTH

● ±0.05% ACCURACY

● ±0.02% LINEARITY

● CSA CERTIFIED, FM APPROVED, CE COMPLIANT

● MIX AND MATCH OM5 TYPES ON BACKPANEL

DESCRIPTION

Each OM5-TX 2-wire transmitter interface module provides a single chan­nel which accepts a 4 to 20 mA process current input and provides a
standard +1 to +5V or +2 to +10V output signal (Figure 1). An isolated
+20VDC regulated power supply is provided to power the current transmit-

ter. This allows a 2-wire loop powered transmitter to be directly connected
to the module without requiring an external power supply. The regulated
supply will provide a nominal +20VDC at a loop current of 4mA to 20mA.

The OM5-TX will provide a 1500V isolation barrier for non-isolated 2-wire
field transmitters. It can also be used when additional isolation is required
between an isolated 2-wire transmitter and the input stage of the control
room computer.

The voltage output is logic switch controlled, which allows these modules
to share a common analog bus without the requirement of external
multiplexers.

The modules are designed with a completely isolated computer side circuit
which can be floated to ±50V from Power Common, pin 16. This complete
isolation means that no connection is required between I/O Common and
Power Common for proper operation of the output switch. If desired, the
output switch can be turned on continuously by simply connecting pin 22,
the Read-Enable pin to I/O Common, pin 19.

A precision 20Ω current conversion resistor is supplied with the module.
Sockets are provided on the OM5-BP backpanels to allow installation of
this resistor. Extra resistors are available under part number OMX-1362-C.
All field inputs are fully protected from accidental connection of power-line
voltages up to 240VAC. The module has a 3dB bandwidth of 100Hz. Signal
filtering is accomplished with a six-pole filter, with two poles on the field
side of the isolation barrier, and the other four on the computer side.

2-Wire

Transmitter

+EXC

4

+In

3

–In

2

–EXC

1

Backpanel

Term Block

0.1% plug-in

OMX-1362-C

FIGURE 1. OM5-TX Block Diagram.

20Ω

4

6

5

3

1

NC

2

NC

Surge

Suppression

and

Protection

+V

–V

Isolated

Field-Side

Power

LPF

Isochopper™

Amplifier

Pat Pending

Isolated

Excitation

Source

–V+V

Isolated

Computer-Side

Power

LPF

Power

Oscillator

20

19

22

V

OUT

I/O Common

RD EN\

17

+5V

16

Power
Common

24

SPECIFICATIONS Typical at T

Module OM5-TX
Input Range 4mA to 20mA

Input Resistor
Value 20.00Ω
Accuracy ±0.1%
Stability ±10ppm/°C
Loop Supply Voltage Nominal 20V at 4mA to 20mA

Isolated Excitation Protection
Continuous 240Vrms max
Transient ANSI/IEEE C37.90.1-1989
Input Protection
Continuous 240Vrms max
Transient ANSI/IEEE C37.90.1-1989
CMV, Input to Output
Continuous 1500Vrms max
Transient ANSI/IEEE C37.90.1-1989

CMR (50 or 60Hz) 100dB
NMR (–3dB at 100Hz) 120dB per decade above 100Hz

(1)

Accuracy
Nonlinearity ±0.02% span
Stability
Input Offset ±1µV/°C
Output Offset ±40µV/°C
Gain ±25ppm/°C of reading
Noise
Input, 0.1 to 10Hz 10nArms
Output, 100KHz 500µVrms
Bandwidth, –3dB 100Hz
Response Time, 90% span 4mS

Output Range +1V to +5V or +2V to +10V
Output Resistance 50Ω
Output Protection Continuous short to gnd
Output Selection Time 6µs at C
(to ±1mV of V
Output Current Limit +8mA

Output Enable Control
Max Logic “0” +0.8V
Min Logic “1” +2.4V
Max Logic “1” +36V
Input Current, “0, 1” 0.5µA

Power Supply Voltage +5VDC ±5%
Power Supply Current 180mA at transmitter load of 20mA

Power Supply Sensitivity ±10µV/% RTI

Mechanical Dimensions 2.28" x 2.26" x 0.60" (58mm x 57mm x 15mm)

Environmental
Operating Temp. Range –40°C to +85°C
Storage Temp. Range –40°C to +85°C
Relative Humidity 0 to 95% noncondensing
Emissions EN50081-1, ISM Group 1, Class A (Radiated, Conducted)
Immunity EN50082-1, ISM Group 1, Class A (ESD, RF, EFT)

)

OUT

= +25°C and +5V power.

A

±0.05% span ±4µA RTI

= 0 to 2000pF

load

100mA at transmitter load of 4mA

(2)

(2)

SCM5B

NOTES: (1) Includes nonlinearity, hysteresis and repeatability.
(2) RTI = Referenced to input.

ORDERING INFORMATION

MODEL INPUT RANGE OUTPUT RANGE

OM5-TX-1-C 4mA to 20mA +1V to +5V
OM5-TX-2-C 4mA to 20mA +2V to +10V

25

OM5-DT

General Purpose Input Modules, with DC Excitation

FEATURES

● INTERFACES TO DC DISPLACEMENT TRANSDUCERS AND OTHER
DEVICES REQUIRING A STABLE DC SUPPLY

● HIGH LEVEL VOLTAGE OUTPUTS

●

1500Vrms TRANSFORMER ISOLATION

● ANSI/IEEE C37.90.1-1989 TRANSIENT PROTECTION

● INPUT PROTECTED TO 240VAC CONTINUOUS

● FULLY ISOLATED EXCITATION SUPPLY

● 100dB CMR

● 1KHz SIGNAL BANDWIDTH

● ±0.10% ACCURACY

● ±0.02% LINEARITY

● ±20µV/°C DRIFT

● CSA CERTIFIED, FM APPROVED, CE COMPLIANT

● MIX AND MATCH OM5 TYPES ON BACKPANEL

DESCRIPTION

Each OM5-DT general purpose input module provides a single channel of
transducer input which is filtered, isolated, scaled, and converted to a high
level analog voltage output (Figure 1). This voltage output is logic switch

controlled, which allows these modules to share a common analog bus
without the requirement of external multiplexers.

The modules are designed with a completely isolated computer side circuit
which can be floated to ±50V from Power Common, pin 16. This complete
isolation means that no connection is required between I/O Common and
Power Common for proper operation of the output switch. If desired, the
output switch can be turned on continuously by simply connecting pin 22,
the Read-Enable pin to I/O Common, pin 19.

The OM5-DT can interface to devices which require a precision 10VDC
excitation supply. The 1kHz bandwidth significantly reduces ripple and
noise inherent in these devices.

Transducer excitation is provided from the module by a very stable 10V
source. The excitation supply is fully isolated, allowing the amplifier inputs
to operate over the full range of the excitation voltage. This feature offers
significant flexibility in real world applications. Eight full scale input ranges
are provided, from ±1V to ±10V, producing ±5V full scale output.

The input signal is processed through a pre-amplifier on the field side of
the isolation barrier. This pre-amplifier has a gain-bandwidth product of
5MHz and is bandwidth limited to 1kHz. After amplification, the input signal
is chopped by a proprietary chopper circuit. Isolation is provided by
transformer coupling, again using a proprietary technique to suppress
transmission of common mode spikes or surges. The module is powered
from +5VDC, ±5%.

Special input circuits provide protection of the signal inputs and the
isolated excitation supply up to 240VAC.

+EXC

DC LVDT

or Other

Transducer

+In

–In

–EXC

Backpanel

Term Block

FIGURE 1. OM5-DT Block Diagram.

4

4

3

2

1

6

5

3

2

Surge

Suppression

and

Protection

1

NC

NC

+V

–V

LPF

Isolated

Field-Side

Power

Isochopper™

Amplifier

Pat Pending

Isolated

Excitation

Source

+V

–V

Isolated

Computer-Side

Power

LPF

Power

Oscillator

20

19

22

17

16

V

OUT

I/O Common

RD EN\

+5V

Power
Common

26

SPECIFICATIONS Typical at T

Module OM5-DT
Input Range ±1V to ±10V

Input Bias Current ±0.05nA
Input Resistance
Normal 2MΩ (minimum)
Power Off 2MΩ (minimum)
Overload 2MΩ (minimum)
Input Protection
Continuous 240Vrms max
Transient ANSI/IEEE C37.90.1-1989 (formerly IEEE-472)

Excitation Voltage, V
Excitation current 40mA (maximum)
Excitation Load Regulation ±5ppm/mA
Excitation Stability ±15ppm/°C
Isolated Excitation Protection
Continuous 240Vrms max
Transient ANSI/IEEE C37.90.1-1989 (formerly IEEE-472)

CMV, Input to Output
Continuous 1500Vrms max
Transient ANSI/IEEE C37.90.1-1989 (formerly IEEE-472)
CMR (50 or 60Hz) 100dB
NMR (–3dB at 1kHz) 120dB per decade above 1kHz

(1)

Accuracy
Nonlinearity ±0.02% span

Stability
Input Offset ±20µV/°C
Output Offset ±40µV/°C
Gain ±50ppm/°C

Noise
Input, 0.1 to 10Hz 0.4µVrms
Output, 100KHz 5mVpp

Bandwidth, –3dB 1kHz
Response Time (to 90% final value) 750µs

Output Range ±5V
Output Resistance 50Ω
Output Protection Continuous short to ground
Output Selection Time 6.0µs at C
(to ±1mV of V
Output Current Limit ±8mA

Output Enable Control
Max Logic “0” +0.8V
Min Logic “1” +2.4V
Max Logic “1” +36V
Input Current, “0, 1” 0.5µA

Power Supply Voltage +5VDC ±5%
Power Supply Current 200mA @ Full Exc. load, 100mA @ No Exc. Load
Power Supply Sensitivity ±200µV/% RTI

Mechanical Dimensions 2.28" x 2.26" x 0.60" (58mm x 57mm x 15mm)

Environmental
Operating Temp. Range –40°C to +85°C
Storage Temp. Range –40°C to +85°C
Relative Humidity 0 to 95% noncondensing
Emissions EN50081-1, ISM Group 1, Class A (Radiated, Conducted)
Immunity EN50082-1, ISM Group 1, Class A (ESD, RF, EFT)

NOTES:
(1) Includes excitation error, nonlinearity, hysteresis and repeatability.
(2) RTI = Referenced to input.

EXC

)

OUT

= +25°C and +5V power.

A

+10.0VDC ±2mV

±0.1% span, ±0.2mV RTI

= 0 to 2000pF

load

2

(2)

SCM5B

ORDERING INFORMATION

MODEL MAX IMU M INPUT OUTPUT

OM5-DT-1-C ±1V ±5V
OM5-DT-2-C ±2V ±5V
OM5-DT-3-C ±3V ±5V
OM5-DT-4-C ±4V ±5V
OM5-DT-5-C ±5V ±5V
OM5-DT-6-C ±6V ±5V
OM5-DT-7-C ±7V ±5V
OM5-DT-8-C ±8V ±5V
OM5-DT-9-C ±9V ±5V
OM5-DT-10-C ±10V ±5V

27

OM5-IFI

Frequency Input Modules

FEATURES

● ACCEPTS FREQUENCY INPUTS OF 0 to 100kHz

● PROVIDES HIGH LEVEL VOLTAGE OUTPUTS

● TTL LEVEL INPUTS

● 1500 VOLT TRANSFORMER ISOLATION

● ANSI/IEEE C37.90.1-1989 TRANSIENT PROTECTION

● INPUT PROTECTED TO 240VAC CONTINUOUS

● ±0.05% ACCURACY

● MIX AND MATCH OM5 TYPES ON BACKPANEL

● CSA CERTIFIED, FM APPROVED, CE COMPLIANT

DESCRIPTION

Each OM5-IFI Frequency input module provides a single channel of fre­quency input which is isolated and converted to a high level analog voltage
output. This voltage output is logic switch controlled, which allows these
modules to share a common analog bus without the requirement of external
multiplexers (Figure 1).

The frequency input signal can be a TTL level signal or a zero-crossing signal.
Terminal 3 (+In) on the field-side terminal block is the “common” or ground
connection for input signals. A TTL signal is connected from terminal 2 (–In)
to terminal 3 (+In), while a zero-crossing signal is connected from terminal 4
(+EXC) to terminal 3 (+In). Input circuitry for each of the signal types has
hysteresis built in. An input signal must cross entirely through the hysteresis
region in order to trigger the threshold comparator.

A 5.1V excitation is available for use with magnetic pick-up or contact­closure type sensors. The excitation is available on pin 1 (–EXC) and the
excitation common is pin 3 (+In).

The modules are designed with a completely isolated computer side circuit
which can be floated to ±50V from Power Common, pin 16. This complete
isolation means that no connection is required between I/O Common and
Power Common for proper operation of the output switch. If desired, the
output switch can be turned on continuously by simply connecting pin 22,
the Read-Enable pin to I/O Common, pin 19.

A special circuit in the input stage of the module provides protection against
accidental connection of power-line voltages up to 240VAC.

Zero-Crossing

Inputs

+

–

–

+

+EXC

TTL

Inputs

–EXC

+In

–In

Backpanel

Term Block

4

3

2

1

FIGURE 1. OM5-IFI Block Diagram.

4

6

5

3

Surge

Suppression

and

Protection

1

NC

2

NC

5.1V

+V

–V

Threshold

Comparator

Isolated

Field-Side

Power

Signal

Isolation

–V

+V

Isolated

Computer-Side

Power

F to V

LPF

Power

Oscillator

20

V

19

I/O Common

22

RD EN\

17

+5V

16

Power Common

OUT

28

SPECIFICATIONS Typical at Ta = +25C and +5V Power

Module OM5-IFI

Input Range 0 to 100KHz
Input Threshold Zero Crossing

Minimum Input 60mVp-p
Maximum Input 350Vp-p
Minimum Pulse Width 4µs
TTL Input Low 0.8V max
TTL Input High 2.4V min

Input Hysteresis

Zero Crossing 0.04V
TTL 1.5V

Input Resistance

Normal 100KΩ
Power Off 100KΩ
Overload 100KΩ

Input Protection

Continuous 240Vrms max
Transient ANSI/IEEE C37.90.1-1989

Excitation +5.1V @ 8mA max

CMV, Input to Output

Continuous 1500Vrms max
Transient ANSI/IEEE C37.90.1-1989

CMR (50 or 60Hz) 120dB

(1)

Accuracy
Nonlinearity ±0.02% span
Stability

Offset ±40ppm/°C
Gain ±40ppm/°C

Noise

Output Ripple <10mVp-p @ Input >2% span

Response Time (0 to 90%)

OM5-IFI-500/1K-C 300 ms
OM5-IFI-3K-C 170 ms
OM5-IFI-5K/10K-C 90 ms
OM5-IFI-25K/50K/100K-C 20 ms

Output Range 0V to +5V
Output Resistance 50Ω
Output Protection Continuous short to ground
Output Selection Time 6µs at C

(to ±1mV of V

Output Current Limit +8mA

Output Enable Control

Max Logic “0” +0.8V
Min Logic “1” +2.4V
Max Logic “1” +36V
Input Current, “0,1” 0.5µA

Power Supply Voltage +5VDC ±5%
Power Supply Current 110mA
Power Supply Sensitivity ±150µV/% RTO

Mechanical Dimensions 2.28" x 2.26" x 0.60" (58mm x 57mm x 15mm)

Environmental

Operating Temp. Range -40°C to +85°C
Storage Temp. Range -40°C to +85°C

Relative Humidity 0 to 95% noncondensing
Emissions EN50081-1, ISM Group 1, Class A (Radiated, Conducted)
Immunity EN50082-1, ISM Group 1, Class A (ESD, RF, EFT)

NOTES: (1) Includes nonlinearity, hysteresis and repeatability.
(2) RTO = Referenced to Output.

)

OUT

±0.05% span

= 0 to 2000pF

load

(2)

SCM5B

ORDERING INFORMATION

MODEL INPUT RANGE OUTPUT RANGE

OM5-IFI-500-C 0 to 500Hz 0V to +5V
OM5-IFI-1K-C 0 to 1kHz 0V to +5V
OM5-IFI-3K-C 0 to 3kHz 0V to +5V
OM5-IFI-5K-C 0 to 5kHz 0V to +5V
OM5-IFI-10K-C 0 to 10kHz 0V to +5V
OM5-IFI-25K-C 0 to 25kHz 0V to +5V
OM5-IFI-50K-C 0 to 50kHz 0V to +5V
OM5-IFI-100K-C 0 to 100kHz 0V to +5V

29

OM5-LTC

Linearized Thermocouple Input Modules

FEATURES

● INTERFACES TO TYPES J, K, T, E, R, S, N, AND B
THERMOCOUPLES

● LINEARIZES THERMOCOUPLE SIGNAL

● HIGH LEVEL VOLTAGE OUTPUTS

● 1500Vrms TRANSFORMER ISOLATION

●

ANSI/IEEE C37.90.1-1989

TRANSIENT PROTECTION

● INPUT PROTECTED TO 240VAC CONTINUOUS

● 160dB CMR

● 95dB NMR AT 60Hz, 90dB at 50Hz

● ±1µV/°C DRIFT

● CSA CERTIFIED, FM APPROVED, CE COMPLIANT

● MIX AND MATCH OM5 TYPES ON BACKPANEL

DESCRIPTION

Each OM5-LTC thermocouple input module provides a single channel of
thermocouple input which is filtered, isolated, amplified, linearized and
converted to a high level analog voltage output (Figure 1). This voltage
output is logic-switch controlled, allowing these modules to share a
common analog bus without the requirement of external multiplexers.

The OM5-LTC modules are designed with a completely isolated computer
side circuit which can be floated to ±50V from Power Common, pin 16.
This complete isolation means that no connection is required between I/O
Common and Power Common for proper operation of the output switch. If
desired, the output switch can be turned on continuously by simply
connecting pin 22, the Read-Enable pin to I/O Common, pin 19.

The OM5-LTC can interface to eight industry standard thermocouple types:
J, K, T, E, R, S, N, and B. Its corresponding output signal operates over a
0V to +5V range. Each module is cold-junction compensated to correct for
parasitic thermocouples formed by the thermocouple wire and screw
terminals on the mounting backpanel. Upscale open thermocouple detect
is provided by an internal pull-up resistor. Downscale indication can be
implemented by installing an external 47MΩ resistor, ±20% tolerance,
between screw terminals 1 and 3 on the OM5-BP backpanels.

Signal filtering is accomplished with a six-pole filter which provides 95dB
of normal-mode-rejection at 60Hz and 90dB at 50Hz. Two poles of this filter
are on the field side of the isolation barrier, and the other four are on the
computer side.

After the initial field-side filtering, the input signal is chopped by a
proprietary chopper circuit. Isolation is provided by transformer coupling,
again using a proprietary technique to suppress transmission of common
mode spikes or surges. The module is powered from +5VDC, ±5%.

A special input circuit provides protection against accidental connection of
power-line voltages up to 240VAC.

+EXC

4

Thermocouple

+In

–In

–EXC

Backpanel

Term Block

3

2

1

Temp

Sensor

FIGURE 1. OM5-LTC Block Diagram.

4

6

5

3

NC

+2.5V

100MΩ

Suppression

Protection

1

2

Surge

and

CJC

+V

–V

LPF

Precision

Reference

Isolated

Field-Side

Power

Isochopper™

Amplifier

Pat Pending

–V

+V

Isolated

Computer-Side

Power

Linearizer

LPF

Power

Oscillator

20

19

22

17

+5V

16

Power Common

V

OUT

I/O Common

RD EN\

30

SPECIFICATIONS Typical at T

Module OM5-LTC
Input Range –0.1V to +0.5V

Input Bias Current –25nA
Input Resistance

Normal 50MΩ
Power Off 40kΩ
Overload 40kΩ

Input Protection

Continuous 240Vrms max
Transient

CMV, Input to Output

Continuous 1500Vrms max

Transient
CMR (50Hz or 60Hz) 160dB
NMR 95dB at 60Hz, 90dB at 50Hz

Accuracy See Ordering Information
Stability

Input Offset ±1µV/°C

Output Offset ±20µV/°C

Gain ±25ppm/°C
Noise

Input, 0.1 to 10Hz 0.2µVrms

Output, 100kHz 300µVp-p, 150µVrms
Bandwidth, –3dB 4Hz
Response Time, 90% Span 0.2s

Output Range 0V to +5V
Output Resistance 50Ω
Output Protection Continuous Short to Ground
Output Selection Time 6µs at C

(to ±1mV of V
Output Current Limit +8mA

Output Enable Control

Max Logic “0” +0.8V

Min Logic “1” +2.4V

Max Logic “1” +36V

Input Current, “0”, “1” 0.5µA
Open Input Response Upscale
Open Input Detection Time 10s
Cold Junction Compensation

Accuracy, 25°C ±0.25°C

Accuracy, +5°C to +45°C ±0.5°C
Accuracy, –40°C to +85°C ±1.25°C

Power Supply Voltage +5VDC ±5%
Power Supply Current 30mA
Power Supply Sensitivity ±2µV/% RTI

Mechanical Dimensions 2.28" x 2.26" x 0.6"

Environmental

Operating Temp. Range –40°C to +85°C

Storage Temp. Range –40°C to +85°C

Relative Humidity 0 to 95% Noncondensing

)

OUT

= +25°C and +5V power.

A

ANSI/IEEE C37.90.1-1989

ANSI/IEEE C37.90.1-1989

= 0 to 2000pF

load

(58mm x 57mm x 15mm)

(1)

(2)

Emissions EN50081-1, ISM Group 1, Class A (Radiated, Conducted)
Immunity EN50082-1, ISM Group 1, Class A (ESD, RF, EFT)

NOTES: (1) This is equivalent to °C as follows:
Type J 0.020 °C/°C, Types K, T 0.025°C/°C,
Type E 0.016°C/°C, Types R, S 0.168°C/°C,
Type N 0.037°C/°C, Type C 0.072°C/°C.
(2) Referenced to input.

ORDERING

INFORMATION

†

Includes conformity,
hysteresis and
repeatability. Does not
include CJC accuracy.

MODEL TYPE INPUT RANGE OUTPUT RANGE ACCURACY

†

OM5-LTC-J1-C Type J 0°C to +760°C (+32°F to +1400°F) 0V to +5V ±0.08% ±0.61°C
OM5-LTC-J2-C Type J -100°C to +300°C (-148°F to +572°F) 0V to +5V ±0.08% ±0.32°C
OM5-LTC-J3-C Type J 0°C to +500°C (+32°F to 932°F) 0V to +5V ±0.07% ±0.36°C
OM5-LTC-J4-C Type J -100°C to +760°C (-148°F to +1400°F) 0V to +5V ±0.08% ±0.70°C
OM5-LTC-K1-C Type K 0°C to +1000°C (+32°F to +1832°F) 0V to +5V ±0.08% ±0.80°C
OM5-LTC-K2-C Type K 0°C to +500°C (+32°F to +932°F) 0V to +5V ±0.08% ±0.38°C
OM5-LTC-K3-C Type K -100°C to +1350°C (-148°F to +2462°F) 0V to +5V ±0.08% ±1.2°C
OM5-LTC-T1-C Type T -100°C to +400°C (-148°F to +752°F) 0V to +5V ±0.16% ±0.80°C
OM5-LTC-T2-C Type T 0°C to +200°C (+32°F to +392°F) 0V to +5V ±0.13% ±0.25°C
OM5-LTC-E-C Type E 0°C to +1000°C (+32°F to +1832°F) 0V to +5V ±0.10% ±1.0°C
OM5-LTC-R-C Type R +500°C to +1750°C (+932°F to +3182°F) 0V to +5V ±0.10% ±1.3°C
OM5-LTC-S-C Type S +500°C to +1750°C (+932°F to +3182°F) 0V to +5V ±0.10% ±1.3°C
OM5-LTC-B-C Type B +500°C to +1800°C (+932°F to +3272°F) 0V to +5V ±0.15% ±2.0°C

31

OM5-AV

Voltage Output Modules

FEATURES

● ACCEPTS HIGH LEVEL VOLTAGE INPUTS TO ±10V

● PROVIDES HIGH LEVEL VOLTAGE OUTPUTS TO ±10V

● 1500 VOLT TRANSFORMER ISOLATION

● ANSI/IEEE C37.90.1e-1989 TRANSIENT PROTECTION

● 5 POLES OF FILTERING

● 110dB CMR

● 400Hz SIGNAL BANDWIDTH

● ±0.05% ACCURACY

● ±0.02% LINEARITY

● MIX AND MATCH OM5 TYPES ON BACKPANEL

● CSA CERTIFIED, FM APPROVED, CE COMPLIANT

DESCRIPTION

Each OM5-AV voltage output module provides a single channel of analog
output. The track-and-hold circuit in the input stage can be operated in a hold
mode where one DAC can supply many output modules, or a track mode
where one DAC is dedicated to each module. In addition to the track-and-hold
circuit, each module provides signal buffering, isolation, filtering, and
conversion to a high level voltage output.

Setting of the track or hold mode is controlled by the logic state of WR EN\,
module pin 23. When pin 23 is low, the track mode is enabled. If pin 23 is
open or high, the hold mode is enabled. The module is designed with a
completely isolated computer side circuit which can be floated to ±50V from
Power Common, pin 16. This complete isolation means that no connection
is required between I/O Common and Power Common for proper operation
of the track and hold circuit. For a low state, simply connect pin 23, the Write­Enable pin, to I/O Common, pin 19.

The OM5-BP-MUX-C backpanels allow host computer control of the WR EN\
control line, which allows multiplexing of one host DAC to up to 64 OM5-AV
output modules. During power up, the output remains 0V output for 100ms,
which allows the track-and-hold circuit to be initialized.

+EXC

4

+Out

R

LOAD

–EXC

–Out

Term Block

3

2

1

Backpanel

FIGURE 1. OM5-AV Block Diagram.

4

NC

6

5

3

NC

Surge

Suppression

Protection

1

NC

2

NC

and

Isolation Barrier

Isolated

Field-Side

Power

Track

&

Hold

Range

Select

–V+V

Isolated

Computer-Side

Power

Power

Oscillator

18

19

23

WR EN\

17

+5V

16

Power Common

V

IN

I/O Common

32

SPECIFICATIONS Typical at TA= +25C and +5V Power

Module OM5-AV

Input Voltage Range ±5V, 0 to +5V, ±10V, 0 to +10V
Input Voltage Maximum ±36V (no damage)
Input Resistance 50MΩ

Output Voltage Range ±5V, 0 to +5V, ±10V, 0 to +10V
Over Range Capability 5% @ 10V output
Output Drive 50mA max
Output Resistance 0.5Ω
Output I Under Fault, Max 75mA
Output Protection

Transient ANSI/IEEE C37.90.1-1989

CMV, Output to Input

Continuous 1500Vrms max

Transient ANSI/IEEE C37.90.1-1989
CMR (50 or 60Hz) 110dB
NMR (–3dB at 400Hz) 100dB per Decade above 400Hz

(1)

Accuracy
Nonlinearity ±0.02% span
Stability

Zero ±25ppm/°C

Span ±20ppm/°C
Noise

Output Ripple, 1kHz bandwidth 2mVp-p
Bandwidth, -3dB 400Hz

Sample and Hold

Output Droop Rate 0.2% Span/s

Acquisition Time 50µs

Track-and-Hold Enable Control

Max Logic “0” +0.8V

Min Logic “1” +2.4V

Max Logic “1” +36V

Input Current, “0” 0.5µA

Power Supply Voltage +5VDC ±5%
Power Supply Current 350mA Full load, 135mA No load
Power Supply Sensitivity ±12.5ppm/%

Mechanical Dimensions 2.28" x 2.26" x 0.60" (58mm x 57mm x 15mm)

Environmental

Operating Temp. Range -40°C to +85°C

Storage Temp. Range -40°C to +85°C

Relative Humidity 0 to 95% noncondensing

RFI Susceptibility ±0.5% Span error at 400MHz, 5W, 3ft
Emissions EN50081-1, ISM Group 1, Class A (Radiated, Conducted)
Immunity EN50082-1, ISM Group 1, Class A (ESD, RF, EFT)

NOTES: (1) Includes nonlinearity, hysteresis and repeatability.

±0.05% span (0-5mA load)

ORDERING INFORMATION

MODEL INPUT RANGE OUTPUT RANGE

OM5-AV-1-C 0V to +5V -5V to +5V
OM5-AV-2-C -5V to +5V -5V to +5V
OM5-AV-3-C -5V to +5V 0V to +5V
OM5-AV-4-C 0V to +10V -10V to +10V
OM5-AV-5-C -10V to +10V -10V to +10V
OM5-AV-6-C -10V to +10V 0V to +10V
OM5-AV-7-C -5V to +5V -10V to +10V

33

OM5

Module Dimensions and Pinouts

The following mechanical drawing is useful if designing circuit boards to
mount the OM5 modules. Many sockets are available which accept the
mounting

pins. As an example, AMP Inc. provides a socket with part

Top

2.255" (57.3mm)

[2.260" max (57.4mm)]

Side

0.375" (9.5mm)

1.175" (29.8mm)

1.650" (41.9mm)

0.0750" (1.9mm)

number 50865-5.

The captive nut for the 3mm mounting screw can be
obtained from PEM (Penn Engineering and Manufacturing), part number
KFS2-M3.

0.585" (14.9mm)

[0.590" max (15.0mm)]

2.270" (57.7mm)

[2.275" max (57.8mm)]

0.20" (5.1mm)

0.095" (2.4mm)

0.145" (3.7mm)

Pin Diameter = 0.040" (1.02mm)

0.150" (3.8mm)

0.345" (8.8mm)

Bottom

0

WR EN\

Reserved

I/O Common

+5V

–In

–EXC

–SEN

0.345" (8.8mm)

2.025" (51.4mm)

1.650" (41.9mm)

1.175" (29.8mm)

0.375" (9.5mm)

0.900" (22.9mm)

23

22

17

16

6

5

2

1

Top View Bottom View

RD EN\

V

OUT

V

IN

Power Common

+In

+EXC

+SEN

NOTES: (1) All dimensions are “Typical” unless otherwise noted.
(2) Mounting pin plating is 20µ in. gold.

RD EN\

V

OUT

V

Power Common

IN

+In

+EXC

+SEN

22

16

6

2

23

17

5

1

WR EN\

Reserved

I/O Common

+5V

–In

–EXC

–SEN

34

Accessories

12345678910111213141516

17.4" (442.0mm)

17.1" (434.3mm)

11.3" (287.0mm)

7.6" (193.0mm)

3.9" (99.1mm)

0.15"

(3.8mm)

1.275"

(32.4mm)

26 Conductor Male Pin

Connectors P1, P2

(1)

3.47"

(88.1mm)

3.05"

(77.5mm)

Channel

2.27"

(57.7mm)

0.08"

(2.0mm)

0.75" (19.1mm)

0.093"

(2.4mm)

0.14" (3.6mm)

inside diameter

Pin 1

Pin 2

Pin 2

Pin 1

E3

JP15

P2P1

JP1

E2
E1

Inter-channel

Bridge Jumpers

+5VDC Supply

Sockets for Current Conversion Resistors, OMX-1362-C

OMX-CJC-C

Cold Junction

Compensation Circuit

10.32 X 0.40

Ground Lug, Including

Nut and Lockwasher

NOTES:

1. Connector is Berg 65863-075 or equivalent.
Mating Connector is Amp 49958-6 or equivalent.
Connectors P1 and P2 are wired in parallel for “daisy chaining” up to 4 boards.

Swaged Standoff

Thru Hole 0.15" (3.8mm) Dia.

J1 J2 J3

J4

for OM5 Analog Modules

FEATURES

● SINGLE, DUAL, 8-, AND 16-POSITION BACKPANELS

● DIN RAIL MOUNT BACKPANELS

● 19-INCH MOUNTING RACK FOR BACKPANELS

● MULTIPLEXED AND NON-MULTIPLEXED BACKPANELS

OM5-BP-16-C 16 POSITION ANALOG I/O BACKPANEL, NON-MULTIPLEXED

DESCRIPTION

The OM5-BP-16-C 16 channel backpanel (Figure 1) can accept any of the
OM5 analog modules in any mixture. It can be mounted on the OMX-1363-

C 19-inch metal rack. The OM5-BP-16-C has 16 non-addressable analog I/

O signal channels which provides each module with it’s own analog bus. The
module output switch is continuously “on” when using this backpanel and all
sixteen module outputs are simultaneously accessible to high-speed data
acquisition (ADC) boards. A set of inter-channel bridge jumpers permits
connecting an input module’s output to an output module’s input, providing
two levels of isolation. A temperature sensor is mounted on each channel to
provide cold junction compensation for thermocouple input modules (See

● INTERFACE CABLES

● MODULE EVALUATION BOARD

● CABLE-TO-SCREW-TERMINAL INTERFACE BOARD

SCM5B

Figure 2 for schematic). Field connections are terminated with four screw
terminals at each module site. Use system interface cable OMX-1315-XX­C for connection to the host system.

SPECIFICATIONS

Operating Temperature: –40°C to +85°C

95% relative humidity, non-condensing

Interface Connector:

Field High Density Screw Clamp, 14 AWG Max
Logic 26-pin, male header connector

FIGURE 1. OM5-BP-16-C Analog I/O Backpanel Dimensions.

35