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Combustex BMS-2000 [5.03] Operations Manual - 1. INTRODUCTION
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1.8 TECHNICAL SPECIFICATIONS
Rating CSA Class 1, Div. 2; Class 1, Div. 1 (pending); Intrinsically Safe; Nema 4x; B149.3 Compliant
Enclosure Dimensions 10.5” H, 8.5”W, 6” D
Enclosure Construction Molded Fiberglass Polyester with Quick Release Latches
Operating Temperature - 40°C to + 40°C (-40°F to +104°F)
Inputs (12) Digital Solid State; (2) Analog 4-20mA;
(5) Thermocouple Type K Underground Cold Junction Compensated
Outputs (16) 12-30 VDC Digital Solid State Optical Isolated (1.5A each)
(2) Analog 4-20mA 500 Ohm (max.)
Power Supply 12 to 30 VDC Clean Filtered
Current Draw
80 mA (min), 160 mA (typical), 300 mA (max) for Electronics + LCD Backlight + Display
Heater. Current draw of solenoids and other devices driven by BMS will have to be
added to above to calculate total. Total current draw not to exceed 3A.
Display Low Temp. Heated LCD
Mounting Wall Mount Bracket Standard; 2”Pipe Mount Optional
Communication Digital, Analog and Modbus
1.7 DEFINITIONS AND ABBREVIATIONS
Dead Band The allowed deviation from set point (while in ON/OFF Control)
DI Discrete Input
ESD Emergency Shutdown
HTSD High Temperature Shutdown
LCD Liquid Crystal Display
PID Proportional, Integral (Reset), Derivative (Rate)
PV Process Variable (Actual Temperature)
SD or S/D Shutdown
SP Set Point (Desired Temperature)
1.6 COMMUNICATIONS
The Combustex BMS-2000 includes both analog (9 total) and digital (28 total) connections for
communication between the BMS controller and various combustion system monitoring and control
devices. In addition, the BMS oers Modbus connectivity for fast, robust communication between the
BMS unit and remote controllers and readout devices. Modbus protocols RS232 and RS485 can be used
to remotely monitor and congure a select list of settings and status readouts. This functionality is
available in both single and dual-burner versions of the Combustex BMS-2000.