WhatsApp:+86 18005022363 WeChat: +86 18005022363 
Email：
Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 900C53-0021 |
| Manufacturer | Honeywell |
| Product Type | I/O Scanner Module (Scanner 1, single port, for remote I/O rack) |
| Compatible System | Honeywell ControlEdge HC900 Process and Safety Controller |
| Compatible CPUs | HC900 C50 (900C52-02xx-00), C30 (900C32-02xx-00), C70 (900C72-01xx-00), C75 series |
| Installation Position | Remote or expansion I/O rack, immediately right of the power supply module |
| Controller Link Interface | 1 × expansion I/O port, 100Base-TX Ethernet physical layer (RJ45) |
| Network Requirement | External Ethernet switch required when multiple scanners connect to one controller |
| Rack Addressing | DIP switches (SW3) on the module circuit board; C50/C70 addresses 1–11, C75 addresses 1–12 |
| Number of Racks Supported | Up to 5 racks (addressing scheme 1) or up to 12 racks (addressing scheme 2), depending on configuration |
| Scan Behaviour | Cyclic scanning synchronised to the controller scan time for deterministic operation |
| Supported I/O | All HC900 C-series I/O: analogue input and output, digital input and output, thermocouple, RTD, relay, pulse/frequency |
| Diagnostics | Module diagnostics plus I/O module diagnostic status reported to the controller |
| Power Supply | 5 V DC via rack backplane |
| Power Supply Loading | 770 mA maximum |
| Status Indication | Scanner red/green LED for mode or error; expansion port green and yellow LEDs for receive/transmit |
| Hot Swap | Supports removal and insertion under power (RIUP) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −40 °C to +85 °C |
| Relative Humidity | 10 % to 90 %, non-condensing |
| Mounting | Slot-mounted in HC900 I/O rack (4, 8 or 12 slot), secured by two captive faceplate screws |
| Dimensions (H × W × D) | 137 mm × 38.1 mm × 137.16 mm |
| Weight | approx. 0.36 kg |
Main Features and Advantages
Deterministic remote I/O that behaves like local I/O: The defining characteristic of the Honeywell 900C53-0021 is that its data exchange with the controller is synchronous with the controller scan time. Remote I/O on a generic network introduces jitter, and jitter ruins PID tuning; here the scanner keeps the remote rack locked to the controller’s execution cycle, so a loop on a rack 200 metres from the CPU performs the same as one in the CPU rack.Simple, tool-free rack addressing: The rack address is set by DIP switches on the Honeywell 900C53-0021 circuit board, with two documented addressing schemes covering either up to five racks or up to twelve. There is no software license, no address download and no configuration file to load before the module will talk — a technician can set the address with a small screwdriver and the controller recognises the rack on connection, which keeps both commissioning and emergency replacement short.Consolidation of an entire rack into one link: Every input and output module in the remote rack is served by the single expansion port on the Honeywell 900C53-0021. Instead of running individual home-run cables for dozens or hundreds of field signals back to a central marshalling panel, the plant runs one Ethernet link and places the I/O where the instruments actually are, which cuts cable, tray, termination and commissioning cost on large or geographically spread sites.Diagnostics that shorten fault finding: A red/green scanner LED reports module mode or error at a glance, while green and yellow port LEDs show receive and transmit activity, so a technician standing in front of the rack can tell within seconds whether a problem is a dead module, a lost link or a field-side issue. Beyond local indication, the Honeywell 900C53-0021 continuously monitors the diagnostic status of the I/O modules in its rack and reports it to the controller, so faults surface in the HC900 engineering and operator environment rather than staying hidden in a remote cabinet.Serviceable without a shutdown: Because the Honeywell 900C53-0021 supports removal and insertion under power, a suspect scanner can be replaced during a brief, controlled intervention with the rest of the process running. Combined with backplane power — no separate supply wiring — and a compact 38 mm wide module that drops into any standard HC900 rack, this makes it a genuinely low-risk component to stock and swap, and a sensible insurance spare for any site running a distributed HC900 architecture.
