WattMaster MG331-21-VAVCAV - Manual (Page 12)

Form: WMS-MG391-05-ModularServiceTool-1C.doc
Page 1 of 1
VAV System
Description
The MG391-05 Modular Service Tool
is a system interface that provides a
direct link to enable the system op-
erator to view the status, configure
and to adjust the setpoints of any
controller on the control system
communications loop. The Modular
Service Tool is housed in an attrac-
tive beige colored plastic enclosure.
The display area is covered with a
clear plastic bezel for protection of
the display screen. The Modular
Service Tool has a four line by 20
character display panel with adjust-
able contrast control and a 27 key
membrane keypad for data selection
and entry. All keypad operations are
simple and straight forward, utilizing
non-cryptic plain English language
messages. Menu driven program-
ming allows for easy setup and op-
eration without the need for special-
ized training. The MG391-05 Modu-
lar Service Tool is supplied with (4)
AA (1.5V) Volt alkaline battery, a 120
VAC/5 VDC power supply and a
communication cable terminated
with an 8 pin DIN connector for con-
nection to the Service Tool. The ca-
ble allows the user to setup and pro-
gram any controller equipped with a
8 pin DIN connector to be pro-
grammed by simply plugging the
quick connect terminal into the
socket on the controller. A PL101904
Modular Service Tool Adapter is also
provided for use on controllers that
do not have 8 pin DIN connectors on
their circuit board.
The Modular Service Tool is designed to be carried by the system installer or service technician. Its rugged plastic
housing, provides superior protection for the electronic components housed inside. The OE391-054 Modular
Service Tool is a top quality service tool that will stand up to the demands of the typical job site environment for
many years.
Technical Data MGE391-05 Modular Service Tool
Power (4) AA (1.5V) Batteries
Supplied
Display 4 Line by 20 Character
Power Switch Membrane Switch Network Connection RS-485
Operating Temp 10
°
F to 149
°
F Protocol HSI Open Protocol Token Passing
Operating Humid-
ity 90% RH Non-Condensing Color Beige
Keypad 27 Key Membrane Style Communications RS-485 9600 Baud
3 Year Warranty WattMaster reserves the right to change specifications without notice
MG391-05
Modular Service Tool
Mode
Selection
6 5 4
7
0
8
1 3 2
9
-
10
.0
0”
4.75”
2.02"
1.63"