Chapter 1. Introduction. Adcon Telemetry MQXA840

Chapter 1. Introduction

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This manual describes the use of the A840 Telemetry Gateway and

A440 Wireless Modem combination. Due to their general nature, either unit can also be used independently, but such uses are beyond the scope of this manual. The manual teaches you how to use the telemetry gateway and the wireless modem as a base station for an Adcon wireless network.

To build a network, you need one or more A730MD, A733, A720, or A723 remote telemetry units (RTUs), an A840/A440 base station, and the addVANTAGE software. For additional information concerning the RTUs and the addVANTAGE software, consult the respective user manuals.

The A840 Telemetry Gateway is a low-power, battery-backed device that acts as an interface between an Adcon wireless network and one or more hosts running addVANTAGE or similar data acquisition software. The gateway is based on a powerful 32-bit processor running the Linux operating system. It has 16-MB Flash

EPROM acting as a hard disk and 16 MB RAM. The software can be upgraded in the field.

Several interfaces are available: ethernet, V34 modem, RS-232 serial, and RS-485 multidrop serial. A built-in rechargeable battery

8 CHAPTER 1

Introduction provides the telemetry gateway with at least 24 hours of operation without mains power.

The A440 Wireless Modem is a low-power, narrow-band data transceiver operating in the 70-cm band. It implements Adcon’s lowspeed radio protocol and is therefore compatible with all Adcon

RTUs. In addition the A440 modem supports a high-speed wireless protocol that will be used by future Adcon devices.

The A440 has an 8-bit Flash-based microcontroller that can also be upgraded in the field.

NOTE FOR USA: THIS DEVICE COMPLIES WITH PART 15 OF THE

FCC RULES. OPERATION IS SUBJECT TO THE CONDITION THAT

THIS DEVICE DOES NOT CAUSE HARMFUL INTERFERENCE.