1. BOILER COMMUNICATIONS
MODULE (BCM)
When installed and enabled, the BCM enhances the range of
control functions offered by the Modulex Boilers. These
additional control functions include the following:
•
BCM provides a fault relay which energizes when a global
fault (all burners off), or a fault on the inserted burner or a
fault that can not achieve the required target setpoint
occurs.
•
BCM serves as a Back-up Controller in the event that the
primary E8 Controller fails.
•
BCM can be selected as the Primary Controller instead
of the E8.
•
BCM can function as a “Slave” to a “Master” Energy
Management System (EMS), Building Automation System
(BAS).
Paragraph 1.1 through 1.7 which follow provide detailed
descriptions of the BCM and each of the additional control
functions listed above.
1.1
BOILER COMMUNICATIONS MODULE
(BCM) DESCRIPTION
1.1
BOILER COMMUNICATIONS MODULE (BCM)
The BCM is installed on the front of the Modulex Boiler,
behind the removable front panel.
Two Control Switches are mounted on the clear plastic
cover on the front of the BCM. Three LED Status Indicators
are mounted directly on the BCM PCB and can be viewed
through the clear plastic cover. In addition, the PCB
contains an on-board, screwdriver-adjustable address
switch. The control and indicator functions are illustrated
and described in Figure 1-2.
The Modulex Boiler is shipped with the BCM, a third Control
Switch is mounted above the BCM. This switch is used to
enable/disable the e-Bus connection between the E8 and
BCM Controllers. Refer to paragraph 1.4.3 for details.
Figure 1-2. BCM Controls and Indicators
CONTROL /
INDICATOR
ENABLE/DISABLE
SWITCH (I/0)
RESET SWITCH
DL1 (Yellow) LED
DL2 (Red) LED
DL3 (Green) LED
SW1
FUNCTION
DL1 STATUS
Momentary two-position rocker
switch resets (clears) fault relay
and LED when activated.
Two-position rocker switch enables
the BCM to act as a Back-Up
Controller when placed in the ON (I)
position.
Communication Status Indicator
functions as follows:
DESCRIPTION
OFF
No devices detected by
either communication
interface
BLINKING
Only one communication
device detected at one
communication interface
(input or output) ON Both
communication interfaces
(input & output) are active
ON
Both communication
interfaces (input &
output) are active
Alarm Status LED lights when a fault
is detected by the BCM. Activating the
Reset Switch will clear the faults
Pump Status Indicator lights when
Pump is running.
Screwdriver-adjustable rotary switch
labeled 0 – 9. This switch is used to
set the corresponding address of the
Modulex Boiler on the input Modbus or
Ebus Network.
OUTPUT
COMMUNICATIONS
(Ebus)
SW1
ENABLE/DISABLE
SWITCH
INPUT
COMMUNICATIONS
(Modbus/Ebus)
RESET
SWITCH
DL1
(
W
YELLO )
DL2
(RED)
DL3
(GREEN)
FRONT VIEW
Modulex Controller Operation
2
