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©2008 by RF Monolithics, Inc.

HNIO-241A - 4/10/08

Flexible I/O

The HNIO-241A modem provides two 4 – 20mA inputs, two 4 – 20mA outputs, two opto-isolated digital inputs, and two 250VAC 5A NO relay contacts.

Offering full bidirectional operation, the 2 analog inputs on one end are repeated on the 2 analog outputs of the second modem while the analog inputs of

the second radio are repeated on the analog outputs of the first modem – simultaneously. Similarly, the digital inputs on one modem control the relay

contacts of the other modem. Each base radio can connect up to four remote radios. Four base radios can be located together.

Fully Configurable

The HNIO-241A is fully configurable through DIP switches. Configurable options include edge or level triggered inputs, positive or negative activation

signals (selectable per channel), frequency of transmission from continuous to once every 45 minutes, and an RF link interruption fail-safe mode. A third

NO relay contact indicates RF link status.

Industrial Networking

The HNIO-241A is designed for industrial and outdoor applications with a -40°C to +70°C operating temperature range. The HNIO-241A can operate over

an input voltage range of +9Vdc to +30Vdc making it suitable for battery and solar power sources. The HNIO-241A is Class I Div 2 certified for hazardous

location use. The standard DIN-rail enclosure or optional six inch cabinet allows easy installation whatever the application. The HNIO-241AR and

HNIO-241AZ are external versions where the remote radio is housed in a separate NEMA 4X rated enclosure with either an integral patch antenna or a

reverse TNC antenna connector.

FHSS Technology

The frequency hopping spread spectrum technology used in the HNIO-241A has been powering a wide variety of mission-critical industrial applications for

years and embodies extensive experience in spread spectrum radio design. With superior immunity to jamming and multipath fade, RFM FHSS technology

transmits data over the air at a crisp 460.8Kbps rate providing short latencies and plenty of bandwidth. Operating in the 2.4GHz band, the HNIO-241A can

be deployed license-free worldwide.