The Honeywell 900P24‑0101, also cataloged as the 900P24‑0101 expansion processor module, serves as the primary expansion‑class processor used to execute distributed I/O power and backplane loading tasks across ControlEdge HC900 platforms.
Hardware Specifications
Parameter
Specification
Model
900P24‑0101
Brand
Honeywell
Origin
ControlEdge HC900 Platform
Weight
2.0 kg (shipping)
Dimensions
Not specified
Operating Temp
Not specified
Power Consumption
Input rating 72.5 W
Input Voltage
21 to 29 V DC
Input Current
5 A max continuous
Inrush Current
30 A for 3 ms @ 29 V DC
Output Rating
60 W
Product Type
Expansion Processor Module
4‑20 mA HART Loop Protocol and Channel Isolation Behavior
Within HC900 process‑instrumentation architectures, the 900P24‑0101 maintains stable DC power conditions required for modules handling 4‑20 mA HART loop protocol. The regulated output minimizes ripple that could interfere with HART frequency modulation. When powering mixed analog modules, channel‑to‑channel isolation inherent to HC900 I/O is preserved, preventing cross‑loop interference and maintaining predictable analog update timing.
Frequently Asked Questions
Q: Can the 900P24‑0101 be hot‑swapped while the rack is energized? A: No. The module must be inserted or removed only when the HC900 chassis is de‑energized.
Q: Does the inrush current require upstream protection coordination? A: Yes. The 30 A inrush for 3 ms may require coordination with upstream DC breakers or fuses to avoid nuisance tripping during startup.
Q: Does the module provide regulated auxiliary outputs for external loads? A: No. The output rating applies to HC900 backplane and I/O powering only. External loads should not be connected.
Field Installation Guidelines
Maintain proper torque on screw‑type terminals to ensure stable conductor engagement within the specified DC wiring range.
Route DC input wiring separately from signal conductors to reduce electromagnetic coupling.
Bond shielded cable grounds at a single point to prevent circulating currents.
Ensure adequate airflow around the module to prevent thermal buildup within the enclosure.
Verify correct polarity before energizing the DC supply.
