McQuay MicroTech Installation Manual

This manual provides information on the components, in­stallation, and service information for the

MicroTech”

Modem Kit. This new modem kit (part number 0072140601)
replaces part numbers 06680478-01 and 06702848-01
previously offered. The

MicroTech

Modem Kit, in conjunc-

tion with

MicroTech MonitorTM

software, allows the monitor-

ing of various

MicroTech

panels and controllers from a

remote or off-site location. See the list below for the

Micro-

Tech controllers that can accommodate a modem.

9

Network Master Panel (NMP)

l

Series 200 Application Specific Controller (ASC-200)

General Description

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Loop Water Controller (LWC)
Application Specific Controller (ASC)
Remote Monitoring and Sequencing Panel (RMS)
Remote Monitoring and Control Panel (RMC)
Chiller System Controller (CSC)
Chiller Plant Controller (CPC)
Centrifugal Chiller Unit Controller
Reciprocating Chiller Unit Controller
Self-contained Air Conditioning Unit Controller
Screw Chiller Unit Controller
Applied Rooftop Unit Controller

Component Data

The main components of the

MicroTech

Modem Kit include
a modem, an interface cable, a U-shape and L-shape
bracket, and a ?&inch foam gasket.

Modem

The modem, shown in Figure 1, is a US Robotics”

World-

PortTM 14.4K

Fax/Data modem. A modem allows com-

munications between a

MicroTech

controller or a network of

controllers and a remote PC (not in the same location as

the controller). This is done by connecting the modem to a

phone line. The person wanting to monitor the controller(s)

then dials the phone number assigned to the modem.

The modem has four feedback

LEDs,

a nine-pin female

extension cable, a phone jack, and an AC adapter jack.

Note: To monitor

MicroTech

controller(s) via the use of

a modem, your PC must be equipped with a modem and

the appropriate

MicroTech

Monitor software package.

Feedback

LEDs

The Feedback

LEDs

show the status of the modem.

The HS

LEDs

refer to the modem’s connection speed.

There are two HS

LEDs,

one green and one red. The

LEDs

are both located under the heading

“HS”

on the modem

(see Figure

1).The

LED will either stay on or flash (see

Table 1 for LED interpretation).’

Table 1. HS LED lnterpretation

The

ARQ/FAX

LED refers to error control or fax opera-

tions. The LED will either stay on or flash. ARQ stands for

Automatic Repeat Request. If an error occurs, the modem
will detect it and retransmit the data (see Table 2 for LED
interpretation).’

Table 2. ARQ/FAX LED Interpretation

The CD LED refers to carrier detect. The term “carrier” is

defined as the following according to the US Robotics

WorldPort

High Speed Modem User’s Guide: “A continuous

frequency that can either be modulated or impressed with

another information-carrying signal. These carriers are
generated and maintained by the modem via transmission
lines of the telephone company.” Table 3 shows the CD LED
interpretation.’

Table 3. CD LED lnterpretation

The LB LED refers to low battery. In all

MicroTech

ap­plications, a battery is not used. The power plug provides
power to the modem. If the LED is on, the power supply has
a low voltage and needs to be checked.

Extension Cable
The extension cable is an external cable that is hard-wired

to the modem. The cable is 12-inches long and is termi-

nated with a nine-pin female connector. The extension
cable attaches to the interface cable (see Figure

2),

and the

two are secured together by screw connections.
Phone Jack

The phone jack connects to an existing telephone line and
allows data transmission to an external PC to take place.
The jack’s location is on the side of the modem. A

quick­connector on the end of the telephone line connects to the
phone jack. By calling the telephone number and having the
correct PC software and modem, you can initiate com-

munications between the

MicroTech

controller(s) and your

PC.

AC Adapter Jack

The AC adapter jack is an entry point for AC voltage. The
jack’s location is on the top of the modem. A power plug
from the interface cable (see Figure 2) connects to the jack

and sends the AC voltage to the modem.

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