Honeywell TC-PIL081 Temp Input Module 8-Channel RTD/TC

TC-PIL081 8-Point Temperature Input Module by Honeywell

Product Introduction

The TC-PIL081 from Honeywell provides eight configurable temperature input channels. All channels reference a single common ground. This module supports both thermocouple (TC) and RTD sensor types. You can split channels into two groups: 0–3 and 4–7. Each group has its own filter setting.

Temperature formats include Celsius, Fahrenheit, or Kelvin for all channels. The Honeywell TC-PIL081 also carries a CENELEC II (1) 2G EEx ia/ib IIB/IIC T4 rating. This makes it suitable for intrinsically safe installations.

Technical Specifications

Thermocouple Input Features

• mV range: –40 to 100mV

• Supported TC types: E, J, K, N, R, S, T

• TC modes: No compensation, fixed compensation, or external compensation

• Reference temperature: CJC reference element or external compensation

• Accuracy for types E, J, K, N: ±0.5% of mV input

• Accuracy for types R, S, T: ±0.8% of mV input

Note: B and L types are not presently supported.

RTD Input Features

• Resistance range: 0 to 500 ohms (without conversion)

• Supported RTD types:

  • Pt 100/200 (IEC 751, Amendment 2)

  • Pt 100/200 (JIS C1604-1989)

  • Ni100, Ni200 (DIN 43760-1987)

  • Ni120 (Minco)

  • Cu10 (Minco)

• RTD modes:

  • 2-wire without lead compensation

  • 2-wire with lead compensation

  • 3-wire measurement

  • 4-wire measurement

• Lead resistance: <10 ohms per lead (preliminary)

Accuracy and Resolution

• RTD accuracy: 0.1% max for most types

  • Pt100 JIS: ±0.125%

  • Ni100: ±0.200%

  • Ni200: ±0.15%

• Linearization accuracy: ±0.2°C maximum

• Cold junction sensor accuracy: ±0.8°C at 25°C

• Cold junction drift:

  • 300ppm/°C from –20°C to –15°C

  • 100ppm/°C from –15°C to 70°C

• Response time: 4 ms

• Resolution: 16 Bits

Permissible Field Circuit Values

For All Input Channels

• Uo: 9V

• Io: 37mA

• Po: 83mW

• Lo (IIB): 80mH max | Lo (IIC): 20mH max

• Co (IIB): 40µF max | Co (IIC): 4.9µF max

Internal CJC Values

• Uo: 9V | Io: 1mA | Po: 3mW

• Lo: 1H for both IIB and IIC

Filter and Alarm Configuration

Filter Cutoff

Configurable per channel group (0–3 and 4–7) at: 0.2, 0.5, 1, 2, 3, or 10 Hz

Fault Detection

• Configurable lead breakage or short circuit detection per group

• Overrange alarm per channel

• Underrange alarm per channel

• Cold junction alarm

Terminal Assignments and Wiring

The TC-PIL081 supports multiple wiring schemes depending on sensor type.

• Thermocouple (2-wire): Use two terminals per channel

• RTD 2-wire: Two terminals with optional compensation

• RTD 3-wire: Three terminals per channel

• RTD 4-wire: Four terminals per channel

Always refer to the base terminal layout for exact pin positions.

Power and Isolation

• Power consumption: 0.19 power supply unit load

• Power dissipation: 1.6W

• Input voltage: Intrinsically safe power via terminal base

• Galvanic isolation (per DIN EN 50020):

  • Input / backplane bus

  • Input / power supply

• No isolation between input channels

Mechanical and Environmental Conditions

Operating Environment

• Ambient temperature: –20°C to 70°C (–4°F to 158°F)

• Storage temperature: –20°C to 100°C (–4°F to 212°F)

• Max humidity: 95% non-condensing

• Pollution gas test: Level G3 (ISA-S71.04-1985)

Shock and Vibration

• Shock test: 15g peak, 11ms duration

• Vibration test: 2g @ 10Hz to 500Hz (IEC 68-2-6)

• Protection class: IP20 (requires IP54+ housing for field use)

Physical Dimensions

• Weight: 0.247 kg (0.54 lb)

• Dimensions (H x W x D): 76 x 94 x 46 mm (3.0 x 3.7 x 1.8 inches)

• Keyswitch position: 2

Standards and Certifications

The TC-PIL081 conforms to multiple international standards:

• DIN EN 50014:1992

• DIN EN 50020:1997

• DIN EN 50284:1997

• DIN IEC 721 (climatic conditions)

• EMC: DIN EN 50081-2, DIN EN 50082-2, NAMUR NE 21

Certifications:

• CENELEC: II (1) 2G EEx ia/ib IIB/IIC T4

• DMT 99 ATEX E-025 X

Installation Guidelines

Follow these steps to install the Honeywell TC-PIL081 correctly.

First, verify the keyswitch position is set to 2 on the base. Then mount the module onto the terminal base. Next, configure each channel group for either TC or RTD operation. Select the appropriate filter frequency for your application.

For EMC compliance, always use shielded multicore cable. Each channel requires its own shield with isolation greater than 500V. Additionally, field installations need an IP54 or better enclosure.

Finally, set up alarms for lead breakage, overrange, or underrange as needed. The cold junction alarm helps monitor reference junction health.

Packaging List

• TC-PIL081 Temperature Input Module (1 unit)

• Anti-static protective bag

• Quick installation guide (printed)

Note: Terminal bases, cables, and sensors are sold separately.

Shipping Information

We ship worldwide using Fedex, UPS, or DHL. A tracking number is provided after dispatch.

Frequently Asked Questions (FAQ)

1. Can the TC-PIL081 handle both thermocouples and RTDs at the same time?
Yes. You can configure channels 0–3 for one sensor type and channels 4–7 for another. Each group operates independently with its own filter setting.

2. Does the module support 4-wire RTD measurement?
Yes, the TC-PIL081 supports 2-wire, 3-wire, and 4-wire RTD configurations. Four-wire mode provides the highest accuracy by eliminating lead resistance errors.

3. What happens during a sensor lead breakage?
The module detects the open circuit if fault detection is enabled. You can configure this feature separately for channel groups 0–3 and 4–7.

4. Is there galvanic isolation between input channels?
No. All inputs share a common reference. However, isolation exists between the inputs and the backplane bus. Isolation also exists between inputs and the power supply.

5. What is the response time of the TC-PIL081?
The module has a fixed response time of 4 milliseconds. This makes it suitable for fast temperature control loops.