SNAP Analog Input Modules

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ICTD Temperature Input Module, Two or Four Channels

Description

SNAP-AICTD and SNAP-AICTD-4 modules provide

temperature input data from any industry-standard Integrated

Circuit Temperature Device (ICTD). The SNAP-AICTD has two

channels, and the SNAP-AICTD-4 has four channels. See the

table on page 3 for I/O processor compatibility.

The simple two-wire connections are made to the pluggable

terminal strip on top of the module. Up to 2,000 feet of

ordinary hook-up wire is used to connect the sensor to the

input terminal strip.

Both modules are compatible with all industry-standard ICTD

probes, including the AD-590 family from Analog Devices and

Opto 22’s part number ICTD.

Specifications

SNAP-AICTD (Two channels)

Four-channel module wiring is shown on the next page.

IMPORTANT: The mounting rack connector has 24 pins; the

module connector has 20 pins. The extra pins on the

mounting rack connector prevent misalignment of the

module during installation.

Part Number

Description

SNAP-AICTD

Two-channel analog temperature input,

ICTD

SNAP-AICTD-4

Four-channel analog temperature input,

ICTD

Input Range with ICTD

Probe

-40 °C to +100 °C

Module Input Range

Zero Scale

Full Scale

-273 °C

+150 °C

Resolution

0.017 °C

Accuracy with ICTD Probe

±0.8 °C

Sensitivity

1.0 microamps/ °C

Data Freshness (Max)

167 ms (2-channel module)

355 ms (4-channel module)

DC Common Mode Rejec-

tion

>-120 dB

AC Common Mode Rejec-

tion

>-120 dB @ 60 Hz

Maximum Operating Com-

mon Mode Voltage

250 V

Isolation

1500 V

Power Requirements

5 VDC (± .015 ) @ 150 mA

Operating Temperature

0 °C to 70 °C

Storage Temperature

-40 °C to 85 °C

Wire size

22 to 14 AWG

Torque, hold-down screws

4 in-lb (0.45 N-m)

Torque, connector screws

5.26 in-lb (0.6 N-m)

Agency Approvals

UL, FM, CE, RoHS, DFARS

Warranty

Lifetime