TROX EM-BAC-MOD Modbus RTU Instruction Manual

: June 15, 2024
: TROX

Table of Contents

EM-BAC-MOD
Application
Description
Special characteristics
Technical data
References
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TROX EM-BAC-MOD Modbus RTU

TROX EM-BAC-MOD Modbus RTU

EM-BAC-MOD

BACNET AND MODBUS INTERFACE FOR EASYLAB CONTROLLERS AND ADAPTER MODULES

Expansion module for EASYLAB fume cupboard controllers, room controllers, extract air controllers, supply air controllers, and adapter modules, for the integration of rooms or individual volume flow controllers with the central BMS

Switching between BACnet MS/TP and Modbus RTU
BACnet Standardized Device Profile (Annex L)
Modbus interface with individual data registers
Native BACnet interface by integrating the expansion module with
EASYLAB components
Easy retrofitting
Double-stack terminal blocks for the EIA-485 bus
Equipment address and data transfer parameters can be defined

Interface to central BMS

When used on a controller with active room management function (RMF) the module provides also data points for the entire room, e.g. for total volume flows or consolidated alarms
When used on a single controller: data points for volume flow rate, alarm, damper blade position, or others
Centralized operating mode default setting, e.g. night-time operation

Application

Application

Expansion module Type EM-BAC-MOD for the EASYLAB system
BACnet-MS/TP or Modbus RTU interface to the central BMS
Data points for individual controllers or for the room
Room interface: Default setting of room operating modes within the EASYLAB system, increase or reduction of the air change rate, readout of the actual room operating values or evaluated damper blade positions, consolidated alarms
Controller interface : Operating mode default setting for a single fume cupboard controller, readout of individual operating values such as volume flow rates for single controllers, or individual alarms
Can be used with fume cupboard, supply air, extract air or differential pressure controller EASYLAB TCU3 and with adapter module TAM
For use in laboratories, clean rooms in the pharmaceutical and semiconductor industries, operating theatres, intensive care units, and offices with very demanding control requirements
Factory mounted or for retrofitting into the EASYLAB base component casing

Special characteristics

Ready for installation, can be easily connected to the main PCB
Interface for EIA-485 networks BACnet MS/TP and Modbus RTU
BACnet Protocol Revision 12.0
Only standard BACnet objects or Modbus registers are used for communication
Data interface for an EASYLAB controller or for an EASYLAB room with different functional profiles
Hardware switch to enter network addresses and communication parameters (no communication software required)

Description

Parts and characteristics

Microprocessor with setup programme stored in nonvolatile memory
EIA-485 communication interface
Slide switch to switch between BACnet and Modbus communication protocols
Two address switches, X and Y, to set equipment addresses 1-99
8-way DIP switches to adjust the communication parameter
Double-stack terminal blocks for the EIA-485 network (simple wiring)
Two indicator lights indicate communication and errors, respectively
Connection to update the firmware
EIA-485 terminal resistor that can be activated

Construction features

PCB dimensions and fixing points correspond to the EASYLAB main PCB and the casing
Fixing with screws
Pin header to connect the module to the main PCB of the TCU3 or TAM

Functional description

The expansion module EM-BAC-MOD is used to integrate EASYLAB controllers Type TCU3 or EASYLAB adapter modules Type TAM into a BACnet (MS/TP) network and in this way connect them to the central BMS.

The BACnet or Modbus interface supports the EASYLAB room operating mode concept. It is possible to set operating mode defaults in order to control different volume flow rates for daytime and night-time operation; it is also possible to increase or reduce the air change rate (volume flow rate setpoint change), e.g. to influence the room temperature.

Using the BACnet or Modbus interface, an individual alarm management system can be set up by consolidating configurable EASYLAB alarms. The interface also enables the transfer of actual operating values such as volume flow rates and damper blade position for a controller or for all controllers in a room.

EM-BAC-MOD

① Switch to select BAC Net MS/TP or Modbus RTU protocol
② Plug base for connection with the EASYLAB main PCB
③ Switches to set the network addresses, 01-99
④ DIP switch to set communications parameters
⑤ Network connection (EIA-485)
⑥ Connection to update the firmware
⑦ Indicator lights

Em-bac-mod

Supply voltage	5 V DC from controller or adapter module
Communication interface	EIA-485 standard
Protocol	BACnet MS/TP standard rev. 12 or Modbus RTU
Data transmission speeds	**BACnet: 9600, 19200, 38400, 76800 Bd,

Expansion module to supplement an EASYLAB base component (controller TCU3 or adapter module TAM) with a BACnet or Modbus interface to link rooms or individual volume flow controllers to the central BMS.

The expansion module includes an interface for EIA-485 networks that can be used for BACnet MS/TP or Modbus RTU (switching), a switch to enter communication parameters, a connection to update the firmware, and indicator lights.

Special characteristics

Ready for installation, can be easily connected to the main PCB
Interface for EIA-485 networks BACnet MS/TP and Modbus RTU
BACnet Protocol Revision 12.0
Only standard BACnet objects or Modbus registers are used for communication
Data interface for an EASYLAB controller or for an EASYLAB room with different functional profiles
Hardware switch to enter network addresses and communication parameters (no communication software required)

Technical data

Communication interface : EIA-485 standard
Protocol: BACnet MS/TP standard rev. 12 or Modbus RTU
Data transmission speeds: BACnet: 9600, 19200, 38400, 76800 baud, Modbus: 9600, 19200, 38400, 57600 baud
Parity checks for data security: none, odd, even
Configurable network addresses : 01 … 99
Operating temperature: 0 to 50 °C
IEC protection class: III (protective extra-low voltage)
Protection level: IP 20
EC conformity: EMC to 2004/108/EC

Data points for a single controller

Volume flow rate actual and setpoint values
Damper blade position
Operating mode
Alarm/status messages
Total supply air and total extract air actual values (room)
Evaluated damper blade positions for all controllers in a room
Number of controllers
Integration of volume flows

Additional data points for a fume cupboard controller

Operating mode default setting for the fume cupboard controller equipped with the expansion module
Selection of priority for operating mode default setting
Face velocity actual value and setpoint value (only for fume cupboard controllers with face velocity transducer, equipment function FH-VS)

Data points for an EASYLAB room

Operating mode default setting for the room: Just one data point is required to set the default operating mode for all controllers in a room
Selection of priority for operating mode default setting (central BMS or room)
Room operating mode
Volume flow rate setpoint change (by the central BMS, for example) for an external temperature or differential pressure control
Setpoint value switching for differential pressure control: Switching between two differential pressure setpoint values
Total supply air and total extract air actual values (room)
Evaluated damper blade positions for all controllers in a room
Room differential pressure actual and setpoint values
Room pressure alarm
Number of controllers within the EASYLAB system
Integration of volume flows
Status of the digital inputs and outputs
Configurable consolidated alarm (operating statuses, hardware faults)