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1-Jun-2018
Page 53
002000MAN-01
The BACnet interface is an MS/TP connection via RS-485 twisted pair. There is a termination jumper if required to terminate the con-
nection. It is marked as TERM on the control board, and is located just above the BACnet connector.
The connector on the control board is a three wire removable screw connector. The signals are as follows:
A: Communications line (+) (right pin)
B: Communications line (-) (middle pin)
C: Ground connection (left pin)
Vendor:
Maritime Geothermal Ltd.
Vendor ID:
260
Model Name:
MGT GEN2 Control Board
The following parameters can be set via the LED Display Configuration Menu or via the PC APP Configuration Page.
1) Baud rate
2) Instance number
3) MAC address
The data is available regardless of the selected control method. In order to control the unit via the BACnet interface, set the Control
Source to BACnet either by using the PC APP configuration page or the display menus.
The following tables provide a list of the objects applicable to this model series, along with a description of each.
Note that there may be other objects available that do not apply to this model.
BACnet Interface
TABLE 21 - BACnet OBJECTS - CONTROL SIGNALS (READ/WRITE)
Name
Data Type
ID
Property
Description
SYSTEM_O
Binary Value
BV2 Present Value Switch to air cooling mode (RV#1). Inactive=
HEATING
, Active=
COOLING
SYSTEM_Y1
Binary Value
BV3 Present Value Demand for air heating or cooling modes (active is on)
SYSTEM_Y2
Binary Value
BV4 Present Value Demand for stage 2 air heating or cooling modes (active is on)
SYSTEM_W2
Binary Value
BV5 Present Value Demand for air auxiliary (plenum heater) (active is on)
SYSTEM_G
Binary Value
BV6 Present Value Demand for blower recirculation (active is on)
BACnet_Units
Binary Value
BV9 Present Value Select the units to use for the BACnet objects
Note: object names may be subject to change without prior notice.
SYSTEM_AR
Binary Value
BV7 Present Value Airflow reduction (active is on)
SYSTEM_Y2A
Binary Value
BV1 Present Value Demand for stage 2 water heating mode (active is on)
SYSTEM_Y1A
Binary Value
BV0 Present Value Demand for water heating mode (active is on)
Содержание ATF-45
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