Cirronet 90-20-0-003 Wireless Serial Radio Modem

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Cirronet 90-20-0-003 is a rugged industrial wireless serial transceiver module designed for high-reliability data communication in remote SCADA, automated metering, and distributed process control systems. Utilizing frequency-hopping spread spectrum (FHSS) technology, it provides robust, noise-immune wireless serial links (RS-232/RS-485) across long distances and electrically noisy environments.

Sourcing the 90-20-0-003 as New Surplus is an essential risk-mitigation strategy for network engineers and automation managers overseeing legacy telemetry infrastructure. When an edge wireless modem fails in a water treatment, oil & gas, or traffic control network, finding an exact match is critical to avoid re-licensing or re-configuring entire master-slave radio networks. Acquiring factory-fresh, unused Cirronet inventory delivers immediate plug-and-play installation without the risks of degraded RF output power, worn antenna connectors, or thermal fatigue associated with used radio hardware.

Installation & Configuration Guide

1.Pre-Installation (Prep & Safety):Power isolation, antenna prep, and ESD safety.

Isolate power supplying the local control panel and observe lock-out/tag-out (LOTO) procedures. Attach a grounded ESD wrist strap before handling RF antenna leads or serial communication ports. Ensure the external antenna and surge arrestor are properly installed and grounded according to local code.

2.Removal:Disconnecting power, serial interface, and antenna.

Label and disconnect the DC power leads, serial cable connector (DB9 or screw terminal), and RF antenna coax cable. Unscrew mounting hardware securing the failing radio transceiver to the enclosure backplate or DIN rail, and carefully remove the module.

3.Installation (Clone & Seat):DIP switch cloning, mounting, and cable seating.

Inspect the antenna port and terminal pins on the new 90-20-0-003 for cleanliness and structural integrity. Transfer any hardware DIP switch or jumper configurations (such as Baud Rate, Channel ID, or Master/Slave mode) from the old unit to the replacement drive. Mount the unit securely, then reattach the antenna, serial interface, and DC power leads according to your labels.

4.Power-On & Testing:Power-on, signal strength check, and loop testing.

Re-energize the unit and observe the front-panel status LEDs (Power, Link, Signal Strength/RSSI, Serial RX/TX). Verify proper RF pairing with the master access point and conduct a serial loopback test to confirm error-free data packet transmission.

90-20-0-003

90-20-0-003

Firmware/Software Versions & Upgrade Notes

• RF Configuration & Network Matching: Ensure the radio’s HopNet/Network ID and frequency channel settings match the existing wireless network parameters exactly using Cirronet configuration software or command-line terminal commands.
• Antenna & Cable Care: Never energize or transmit on the 90-20-0-003 transceiver without a properly matched antenna or 50-ohm dummy load attached to the RF port. Operating without an RF load can reflect power back into the final amplifier stage, damaging the internal radio electronics.
• Shielding & Grounding: Always ensure the coax antenna feed line is equipped with a coaxial lightning surge protector grounded to the primary enclosure earth ground.

Frequently Asked Questions (FAQ)

This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability.

Why choose New Surplus over a refurbished Cirronet radio transceiver? Wireless radio modules installed in harsh outdoor or industrial environments suffer continuous RF power amplifier stress and thermal degradation. Refurbished or pulled radio units often exhibit reduced RF output power, diminished receiver sensitivity, or degraded antenna connector solder joints that lead to dropped data packets. Our New Surplus 90-20-0-003 units feature factory-fresh internal transceivers, full transmission range, and long service life.

How is the condition of the 90-20-0-003 verified? Every unit undergoes strict inbound visual and physical quality checks. We verify pristine, un-marred antenna connectors, clean mounting brackets, untouched terminal blocks, and confirm that the radio is preserved in static-safe protective packaging.

What function does the 90-20-0-003 perform in a SCADA system? It acts as a transparent wireless bridge, enabling remote serial devices (PLCs, RTUs, flow meters, sensors) to transmit serial data wirelessly to a central master controller or monitoring server over long distances.

Can this unit drop directly into an existing Cirronet wireless network? Yes. Matching the exact part number 90-20-0-003 ensures identical RF protocol handling, frequency bands, physical interface options, and firmware command compatibility.

What warranty is included with this New Surplus radio module? We support this New Surplus Cirronet 90-20-0-003 wireless modem with a complete 1-year replacement warranty. If any functional or electrical defect arises under standard operating conditions within 12 months, we replace the unit directly from our stock.