Справочник Пользователя для Nautilus International Control & Engineering Ltd NRM-900-1
User Manual
(2009)
Rev
1.0
Page 4 of 6
19/11/09
Nautilus International Control & Engineering Ltd.
Scope and Objectives
This document applies to the Nautilus Radio Module NRM-900-1.
This manual is intended to be used by Nautilus engineers for designing the module into the host
system. It shall also be used by the end user of the system for familiarization with the module’s
operation and observing necessary precautions.
system. It shall also be used by the end user of the system for familiarization with the module’s
operation and observing necessary precautions.
1 FCC Part 15 Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
2 Device
Description
2.1 Purpose and target systems
The NRM-900-1 is a UHF data transceiver module which is only approved for installation in
devices under the control of the Grantee.”
The module provides bi-directional half-duplex data link between two different parts of the
system. The module is designed into the target system at Nautilus. Its operational parameters are
fully controlled by the system firmware running on the host system.
It is expressly prohibited to use the module in any system not designed and approved by
Nautilus. It is also prohibited to alter the system’s firmware controlling the module in any way.
2.2 Module
specifications
2.2.1 Power
requirements
The module shall be powered from a regulated DC power source compliant with the
requirements listed in the following table. All target systems shall provide power source for
the module that meets these specifications.
Parameter Min
Max
Input voltage
3.22V DC
3.37V DC
Input voltage ripple
10mVrms
Current consumption
40mA DC
2.2.2 Control
signals
The module is fully programmed and controlled by the host system by means of the 4-wire
SPI bus plus two status signals. The logic levels of these signals are defined as follows:
-
SPI bus plus two status signals. The logic levels of these signals are defined as follows:
-
logic 0: from 0V to 0.3V;
-
logic 1: from 0.9 to 1.1Vcc, where Vcc is the power supply voltage.