HE693DNT250N GE FANUC HE693DNT25ON

Horner Electric HE693DNT250N | DeviceNet Scanner Module — GE Fanuc Series 90-30 / DNT250 / 63 Nodes / 125k–500k Baud / 1,500ft Range

Adding DeviceNet to the Series 90-30 — Up to 63 Nodes per Scanner

The HE693DNT250N is a DeviceNet Scanner module designed by Horner Electric for the GE Fanuc Series 90-30 PLC platform. As a scanner module, it acts as the DeviceNet master — the node that manages all network communication on the DeviceNet bus, polls slave devices, collects input data, and distributes output data between the Series 90-30 PLC and up to 63 DeviceNet slave devices on the same network segment.

DeviceNet is an industrial device-level network standard used to connect sensors, actuators, drives, and I/O blocks to a PLC without hard-wired point-to-point connections. Each DeviceNet slave — a variable speed drive, an I/O terminal block, a smart sensor, a safety relay, or similar — communicates its data over the shared DeviceNet bus using a unique node address (0–63). The HE693DNT250N manages this communication for all 63 possible node addresses, mapping the received data into the Series 90-30's memory for use in the PLC programme.

The HE693DNT250N fits into the Series 90-30's 5-slot or 10-slot backplane in a standard rack slot, drawing power from the backplane and communicating with the Series 90-30 CPU over the PLC's internal bus. From the CPU's perspective, the scanner's DeviceNet data appears as I/O table data — the programme reads DeviceNet slave inputs and writes DeviceNet slave outputs through standard PLC I/O map references.

Key Specifications

Baud Rate and Cable Distance Trade-Off

DeviceNet's maximum cable distance depends on the baud rate selected:

Longer installations use 125k bps; shorter installations can use 500k bps for faster network update rates. The HE693DNT250N supports all three standard DeviceNet baud rates — the selection is made during network configuration and must match the baud rate setting of all slave devices on the network.

FAQ

Q1: What is a DeviceNet Scanner and how does it differ from a DeviceNet slave?

A DeviceNet Scanner (Master) initiates all network communication — it polls each slave device on a defined scan list at regular intervals, collects input data, and distributes output data. The HE693DNT250N is the scanner. DeviceNet slave devices (drives, I/O blocks, sensors) respond to the scanner's polls; they never initiate communication on their own. A DeviceNet network requires exactly one scanner (master) to manage communication with all slave devices.

Q2: How does the Series 90-30 CPU access DeviceNet data from the HE693DNT250N?

The scanner maps the DeviceNet slave I/O data into the Series 90-30's I/O table. Input data from DeviceNet slaves appears as PLC input table data (%I or %Q references depending on configuration). Output data is written to the scanner's I/O map through PLC output table references. The PLC programme accesses DeviceNet device data using the same standard I/O references used for hard-wired I/O modules.

Q3: What does the "N" suffix in HE693DNT250N indicate?

Within the Horner Electric HE693DNT250 module family, the N suffix identifies a specific hardware revision or variant of the DNT250 base module. Functionally, the HE693DNT250N provides the same DeviceNet Scanner capability as the base HE693DNT250. Confirm the installed module's specific designation from its label when ordering a replacement.

Q4: Can multiple HE693DNT250N modules be installed in the same Series 90-30 system?

Yes. Multiple DeviceNet Scanner modules can be installed in a Series 90-30 rack, each managing a separate DeviceNet network segment. This allows the PLC to control more than 63 DeviceNet devices by distributing them across multiple network segments — each scanner manages its own 63-node segment independently. Each scanner occupies one rack slot and requires its own network configuration.

Q5: Where is the HE693DNT250N sourced?

Through the Horner Electric GE Fanuc 90-30-compatible communications module aftermarket — Horner Electric distributors, industrial automation parts dealers, and tested surplus suppliers. The HE693DNT250 series is a well-established module for Series 90-30 DeviceNet integration; aftermarket availability is generally good. Confirm the N variant specifically from the installed module's label.