Honeywell TC-IDA161 16-Point AC Input Module

Honeywell TC-IDA161 120 VAC Discrete Input Module

Product Introduction

The Honeywell TC-IDA161 belongs to the Series A I/O family and serves as a critical interface for monitoring discrete AC field signals within Honeywell Experion LS and compatible DCS platforms. Specifically, this module accepts 120 VAC nominal inputs and converts them into digital status data for the control system. With 16 input points arranged in two groups of eight (8 points per common), the TC-IDA161 offers high channel density for space-constrained chassis slots. Furthermore, the module supports IEC Type 1+ input compatibility, making it suitable for a wide range of industrial switches, limit contacts, and auxiliary relays.

Technical Specifications

The TC-IDA161 operates with a nominal input voltage of 120 VAC and an on-state voltage range of 79 to 132 VAC at 47 to 63 Hz. For reliable signal detection, the minimum on-state current is 5 mA at 79 VAC. Meanwhile, the off-state voltage maximum is 20 VAC, and the off-state current maximum is 2.5 mA. The nominal input current draws 12.5 mA at both 50 Hz and 60 Hz. Input impedance is rated at a maximum of 11 kΩ at 60 Hz.

Key Technical Parameters:

• Number of Inputs: 16 (8 pts/common)

• On-State Voltage Range: 79-132 VAC, 47-63 Hz

• Nominal Input Current: 12.5 mA @ 50/60 Hz

• Isolation Voltage: 100% tested at 2546 VDC for 1 second (channel-to-channel and user-to-system)

• Input Compatibility: IEC Type 1+

• Power Dissipation: 6.0 watts max

Input Delay & Filtering:
The module offers programmable input delay settings to handle signal noise and contact bounce. First, the off-to-on delay is selectable between 1 ms and 2 ms, with a maximum hardware delay of 10 ms plus filter time. Next, the on-to-off delay is selectable between 9 ms and 18 ms, with a maximum hardware delay of 8 ms plus filter time.

Inrush & Protection:
The short/inrush current peaks at 250 mA, decaying to less than 37% within 22 ms without activation.

Mechanical & Environmental Parameters

The TC-IDA161 utilizes a single-wide module construction, designed to fit directly into compatible Honeywell chassis backplanes. Connection to field wiring is achieved through a TC-TBNH 20-position terminal block. The backplane current draw is rated at 100 mA at 5.1 VDC and 2 mA at 24 VDC. Additionally, the module is built to industrial standards, with an estimated shipping size of 3.5 x 14.2 x 14.5 cm and a gross weight of approximately 0.33 kg. It is important to note that while the module is robust, field wiring practices should adhere to the isolation and voltage limits specified above to prevent false triggering.

Installation Guide

Installing the TC-IDA161 requires proper handling of AC wiring and backplane connections. First, ensure the chassis power is off before inserting or removing the module. Next, seat the module firmly into the designated slot and secure it. Then, wire the field devices to the TC-TBNH terminal block, observing the grouping of 8 points per common. Specifically, verify that the field supply voltage falls within the 79-132 VAC range to guarantee the minimum 5 mA on-state current. For noisy environments, configure the software filter settings to the higher delay values (2 ms off-to-on, 18 ms on-to-off) to suppress jitter. Finally, after wiring, perform a loop check to confirm that no induced voltage exceeds the 20 VAC off-state threshold.

Packaging List

• 1x Honeywell TC-IDA161 Discrete Input Module

• 1x TC-TBNH 20-Position Terminal Block (if specified)

• Protective anti-static packaging

Shipping: Fedex, UPS, DHL

FAQ

Q1: How many input points does the TC-IDA161 module provide?
A: The Honeywell TC-IDA161 provides 16 discrete input points, which are internally arranged as two isolated groups of 8 points sharing a common terminal.

Q2: What is the minimum current required for the module to detect an ON signal?
A: For a reliable on-state detection at the minimum voltage of 79 VAC, the field device must sink at least 5 mA through the input circuit.

Q3: Can the TC-IDA161 accept 240 VAC signals?
A: No. The maximum on-state voltage is 132 VAC, and the nominal rating is 120 VAC. Applying 240 VAC will damage the input circuitry.

Q4: What terminal block is compatible with this module?
A: The TC-IDA161 requires the TC-TBNH terminal block, which has 20 positions. Ensure the terminal block is fully seated before commissioning.

Q5: How does the module handle contact bounce or electrical noise?
A: The module provides programmable digital filtering. By selecting the 2 ms off-to-on and 18 ms on-to-off settings, you can filter out false transitions caused by worn contacts or induced noise.