TC-MDP081 Honeywell 8 Channel Pulse Input Module 2 Output

TC-MDP081 | Honeywell | Pulse Input Module, 8 Channel Input / 2 Channel Output

The TC-MDP081 is a pulse input module for Honeywell control systems. It provides 8 floating, optically isolated inputs. In addition, it offers 2 isolated outputs rated at 500 mA. The module counts pulses from 0 to 100 kHz. Input voltage spans 0 to 30 VDC with selectable high and low ranges. Edge selection lets each channel sense leading or trailing transitions.

Product Short Description

• Honeywell TC-MDP081 pulse input module, 8 inputs and 2 outputs
• Frequency range 0-100 kHz, 32-bit counters
• Optically isolated inputs and 500 mA outputs
• 1500 Vdc isolation, channel-to-channel and to backplane
• Works with TC-TBCH 36-position terminal block

Technical Data

• Inputs: 8, floating, optically isolated
• Outputs: 2, 500 mA, optically isolated
• Frequency range: 0-100 kHz
• Input voltage: 0-30 VDC, high and low range selectable
• High range threshold: approx. 8.80 V
• Low range threshold: approx. 3.25 V
• Hysteresis: 1.1 V high range, 0.90 V low range
• Max input current: 12.5 mA
• Typical input current: 2 mA low range, 6 mA high range
• Counter size: 32 bit
• Power dissipation: 7.0 W max
• Isolation: 1500 Vdc
• Connection: TC-TBCH 36-position terminal block

Channel Function Map

• Channels 0-5: frequency and pulse length only; no outputs
• Channels 6-7: accumulated value, frequency, target values, plus output control
• Pulse length can measure high, low, or period
• Output turns from OFF to ON when the input reaches the target value

Oiltech Controls’s Insight

• Only channels 6 and 7 drive outputs. Plan target-based switching around those two channels.
• Low range suits weak signals near 3.25 V. High range fits 24 V industrial pulses.
• 32-bit counters avoid rollover in long accumulation runs.
• 1500 Vdc channel-to-channel isolation protects against cross-channel noise.
• Edge selection matters for encoder phase and direction sensing.

Oiltech Controls Review

• The module packs 8 counters into one slot. That saves rack space.
• Optical isolation on every input and output supports noisy plant floors.
• Selectable hysteresis helps reject contact bounce.
• Target-value outputs remove the need for separate trip amplifiers.
• The TC-TBCH block simplifies field wiring and checkout.

Suitable Equipment

• Honeywell control racks using TC-TBCH terminal blocks
• Flow meters and turbine meters with pulse output
• Encoders and proximity sensors up to 100 kHz
• Totalizer panels needing 32-bit accumulation
• Systems that need isolated trip outputs from pulse targets

Why Buy From Oiltech Controls?

• More than 15 years in automation spare parts
• Shipments to customers worldwide
• Tested surplus and refurbished stock
• 12-month warranty on modules
• Technical check before shipping
• Support for legacy control platforms

Shipping and Warranty

• Dispatch in 24-28 hours
• Carriers: FedEx, UPS, DHL
• Warranty: 12 months from delivery

FAQ

• Q: Do all 8 channels have outputs?
  A: No. Only channels 6 and 7 have outputs. Channels 0-5 measure frequency and pulse length only.
• Q: Which input range should I pick for a 24 V encoder?
  A: Use the high range. It counts transitions at roughly 8.80 V and suits 24 V signals well.
• Q: How does the target output work?
  A: Set a target on channel 6 or 7. The output turns ON when the input reaches that value.
• Q: Can the module handle contact bounce?
  A: Yes. Hysteresis of 0.90 V on low range and 1.1 V on high range helps reject bounce.
• Q: What should I check before buying a replacement?
  A: Confirm the TC-TBCH block is present, channel count matches your loop, and isolation needs fit 1500 Vdc.

Contact Information

• Email: info@oiltechcontrols.com
• Phone / WhatsApp: +86 158 8020 0923

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