ES-3115 Rev.9
BM
Space-saving Two-wire Signal Conditioners B-UNIT
POTENTIOMETER TRANSMITTER
Functions & Features
• Providing a 4 – 20 mA DC signal proportional to a potentiometer or slidewire position input
• Constant voltage excitation allows use with pots with total resistances from 100 Ω – 2 kΩ without affecting accuracy
• Minimal interaction between zero and span adjustments
• Monitor terminals
• High-density mounting
Typical Applications
• Tank levels
• Positions
MODEL: BM[1]
ORDERING INFORMATION
• Code number: BM[1]
Specify a code from below for [1].
(e.g. BM/Q)
• Specify the specification for option code /Q
(e.g. /C01/S01)
[1] OPTIONS
blank
: none
/Q
: With options (specify the specification)
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
/C03
: Rubber coating
TERMINAL SCREW MATERIAL
/S01
: Stainless steel
GENERAL SPECIFICATIONS
Construction
: Plug-in
Connection
: M3.5 screw terminals (torque 0.8 N·m)
Screw terminal
: Nickel-plated steel (standard) or stainless steel
Housing material
: Flame-resistant resin (black)
Zero adjustment
: 0 to 10 % of total resistance
Span adjustment
: (of total resistance)
135 Ω or above: 50 – 100 %
Below 135 Ω: 70 – 100 %
INPUT SPECIFICATIONS
Potentiometer
: 100 Ω – 2 kΩ
Minimum span
: 50 % of total resistance (≥ 135 Ω); ≥ 70 % of total resistance (< 135 Ω)
Excitation
: Approx. 0.2 V DC
OUTPUT SPECIFICATIONS
Output
: 4 – 20 mA DC
Load resistance vs. supply voltage:
Load Resistance (Ω) = (Supply Voltage (V) – 12 (V)) ÷ 0.02 (A) (including leadwire resistance)
INSTALLATION
Supply voltage
: 12 – 60 V DC
Operating temperature
: -5 to +60°C (23 to 140°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Surface or DIN rail; Standard Rack Mounting Frame BX-16H available
Weight
: 150 g (0.33 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.2 %
Temp. coefficient
: ±0.05 %/°C (±0.03 %/°F)
Response time
: ≤ 0.5 sec. (0 – 90 %)
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM