01Technical Summary
Honeywell 8C-PAIHA1 is a coated Series 8 analog input module with HART for high-level current inputs from two-wire or self-powered transmitters. It provides 16 single-ended channels, 16-bit conversion, a 4-20 mA input range, optional redundancy, galvanic isolation, and a 50 ms input scan rate.
02Specifications
| Manufacturer | Honeywell |
|---|---|
| Model | 8C-PAIHA1 |
| Product Type | Analog Input with HART, coated |
| Input Channels | 16, single ended |
| Input Type | Current; two-wire or self-powered transmitters |
| Input Range | 4-20 mA through 250 ohm |
| A/D Resolution | 16 bits |
| Voltage Rating | 24 VDC |
| Module Current Rating | 110 mA |
| Input Scan Rate | 50 ms |
| Hardware Accuracy | +/-0.075% full scale at 23.5 +/-2 deg C; +/-0.15% full scale at 0 to 60 deg C |
| Galvanic Isolation | 1000 VAC RMS or +/-1000 VDC |
| Common Mode Rejection | 70 dB, dc to 60 Hz |
| Common Mode Voltage | -6 to +5 V peak |
| Maximum Input, No Damage | +/-30 V |
| IOTA Options | 8C-TAIXA1 non-redundant, coated, 6 inch; 8C-TAIXB1 redundant, coated, 12 inch |
03Features
- Extensive onboard self-diagnostics support module and channel health monitoring.
- HART capability supports compatible multivariable devices and device configure or status functions.
- Optional redundancy is available through the specified redundant IOTA arrangement.
- Onboard excitation power can reduce the need for separate marshalling power.
- Internal or external field power selection supports different approved loop designs.
- Fast 50 ms loop scanning and 16-bit conversion support responsive process measurement.
- Galvanic isolation separates system and field circuits in the specified architecture.
- Removal and insertion under power is supported under the applicable Honeywell procedures.
Product identity
8C-PAIHA1
Product type
Analog Input with HART, Single Ended
04Compatibility
- Use 8C-TAIXA1 for the non-redundant coated 6-inch IOTA arrangement.
- Use 8C-TAIXB1 for the redundant coated 12-inch IOTA arrangement.
- Connect 4-20 mA two-wire or self-powered transmitters in the supported single-ended configuration.
- Differential and voltage input modes are not supported by this module.
- System-to-field isolation with external power depends on the approved user-supplied power arrangement.
- Confirm Series 8 controller release, IOTA model, redundancy design, and field-power scheme before ordering.
05Replacement
- Match the exact 8C-PAIHA1 coated model and the installed IOTA before replacement.
- Document channel assignments, HART device configuration, field-power selection, and redundancy state.
- Do not substitute a voltage-input or differential-input module for this single-ended 4-20 mA design.
- Follow Honeywell removal and insertion under power procedures and complete channel diagnostics after installation.
- For redundant service, verify both module positions, the 8C-TAIXB1 IOTA, and the configured failover behavior.
06FAQ
How many input channels does 8C-PAIHA1 provide?
It provides 16 single-ended analog input channels.
What input signal does the module accept?
It accepts 4-20 mA current inputs through 250 ohm from two-wire or self-powered transmitters.
Which IOTA is used for non-redundant operation?
Honeywell specifies the coated 8C-TAIXA1 6-inch IOTA for non-redundant operation.
Which IOTA supports redundancy?
Honeywell specifies the coated 8C-TAIXB1 12-inch IOTA for the redundant arrangement.
Does 8C-PAIHA1 support voltage or differential inputs?
No. The official specification states that differential and voltage inputs are not supported.
Can the module be removed or inserted while powered?
Yes, the official specification supports removal and insertion under power when the applicable Honeywell procedures are followed.
Why is no product weight listed?
The verified manufacturer specification used for this page does not provide a module weight, so it is omitted.
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