MODEL: BM

BM SPECIFICATIONS

ES-3115 Rev.8 Page 1/2

http://www.m-system.co.jp/

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

26 (1.02)

93

(3.66)

mm (inch)

137

(5.39)

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 M-System's 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)

0

10

20

30

40

50

60

0.0

0.5

1.0

1.5

2.0

2.5

SUPPLY VOLTAGE [V]

(600Ω maximum at 24V DC)

2.4

12

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 %)