Vaisala HUMICAP MMT310 Servisní příručka stáhnout pdf (Strana 66)

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GML20 and GML20T

LonWorks® Options for GMD/W20 Series

Signiﬁcant savings

Vaisala's GML20 and GML20T are

interface modules for distributing

signals from Vaisala CARBOCAP

Carbon Dioxide Transmitter Series

GM20 digitally to a LonWorks

network over a twisted pair.

GML20T module connects a Vaisala CARBOCAP

Carbon Dioxide Transmitter

GMW21 to a LonWorks

network.

The GML20 Module distributes

signals; the GML20T Module

distributes both CO

and temperature

signals. The GML20T Module can

be used only with the Vaisala

CARBOCAP

Carbon Dioxide

Transmitter GMW21.

The use of these modules and

Vaisala CARBOCAP

Carbon Dioxide

Transmitter Series GM20 with a

LonWorks

networked control

system contributes to considerable

savings in cabling, installation and

maintenance costs.

Intelligent LonTalk®

protocol

In a LonWorks

network, devices

called nodes communicate with each

other using the LonTalk

protocol.

Every node consists of a Neuron

Features/Beneﬁts

▪

Enables digital communication

between Vaisala CARBOCAP®

▪

Carbon Dioxide Transmitter

Series GM20 and LonWorks®

▪

GML20 for CO

signal

▪

GML20T for CO

+ T signal

▪

Savings in cabling, installation

and maintenance costs

GML20 (left) and GML20T modules

enable digital communication between

the Vaisala CARBOCAP

Carbon

Dioxide Transmitter Series GM20 and a

LonWorks

network.

chip and a transceiver. The Neuron

chip is a microprocessor which

contains an application program and

LonTalk

protocol. The transceiver

adapts the Neuron

chip into the

hardware environment used. The

nodes communicate with each other,

sending messages containing the

value of the desired variables.

With Vaisala modules, these

variables are CO

(GML20) or CO

and temperature (GML20T). Some

network variables are so-called

conguration variables, which are

used to dene the behavior of the

node. With the GML20 and GML20T,

they are used to designate how much

the temperature and/or carbon

dioxide level must change before a

measured value is sent again.

Technical data

Features

t -PO8PSLT

interoperable

t 5XJTUFEQBJSGSFFUPQPMPHZOFUXPSLUZQF51'5BULCQT

t "EEJUJPOBMUXPXJSFTOFFEFEGPSQPXFSJOHUIFUSBOTNJUUFSDBO

thus be connected to both powered and non-powered networks

t 4FSWJDFCVUUPOBOETFSWJDF-&%GPSTJNQMFJOTUBMMBUJPOBOE

configuration

t &YUFSOBMJOUFSGBDFYJGGJMFBWBJMBCMFPOSFRVFTU(.-

part no. 19412GM, GML20T part no. 19748GM)

t 5FNQFSBUVSF(.-5POMZ.FBTVSFNFOUBDDVSBDZ

0.5 °C (0.9 °F) Measurement range 0 ... +45 °C (+32 ... 113 °F)

Warm-up time 30 min.

Network Variables for CO

(BOTH MODELS GML20 AND GML20T)

nviRequest: to request modes for objects within this node

nvoStatus: to report status of objects on this node

nvoCO

ppm: this output variable reports the CO

level detected by

the sensor

nciMaxSendtime: indicates the maximum period of time that

expires before the sensor object automatically updates all its

output variables (default value: 300 seconds)

nciMinSendtime: indicates the minimum period between output

network variable transitions (default value: 5 seconds)

nciCO

MinDelta: indicates the minimum CO

level change

required to update the output network variables

(default value: 10 ppm)

LonWorks

is a registered trademark of Echelon Corporation.

Networks Variables for Temperature

(GML20T MODEL ONLY)

nvoHVACtemp: this output variable reports the temperature

detected by the sensor

nciMaxStime_temp: indicates the maximum period of time that

expires before the sensor object automatically updates all its

output variables (default value: 300 seconds)

nciMinStime_temp: indicates the minimum period between

output network variable transitions (default value: 5 seconds)

nciMinDelta_temp: indicates the minimum temperature change

required to update the output network variables

(default value: 0.3 °C)

nciTmpOffset: indicates the temperature offset level

(default value: -0.8 °C)

This material is subject to copyright protection, with all

copyrights retained by Vaisala and its individual partners. All

rights reserved. Any logos and/or product names are trademarks

of Vaisala or its individual partners. The reproduction, transfer,

distribution or storage of information contained in this brochure

in any form without the prior written consent of Vaisala is strictly

prohibited. All speciﬁcations — technical included — are subject

to change without notice.

For more information, visit

www.vaisala.com or contact

us at sales@vaisala.com

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