·Some details are not shown. Please refer to specification sheets for all information.

6BM

Field-mounted Two-wire
Signal Conditioners 6B-UNIT

POTENTIOMETER TRANSMITTER

Functions & Features
• IP66 / IP67 housing enables field mounting
• Stainless steel field housing selectable
• Potentiometer transmitter that uses a potentiometer as a probe
• Constant voltage excitation allows use with pots with total resistances from 100 Ω – 20 kΩ without affecting accuracy
• Minimal interaction between zero and span adjustments.

MODEL: 6BM-0[1][2][3]

ORDERING INFORMATION
• Code number: 6BM-0[1][2][3]
Specify a code from below for each of [1] through [3].
  (e.g. 6BM-00A1)

SAFETY APPROVAL
0: None

[1] WIRING CONDUIT
0: G 1/2
1: 1/2 NPT
2: M20 × 1.5
3: PG 13.5

[2] ENCLOSURE MATERIAL
A: Diecast aluminum
S: Stainless steel casting

[3] MOUNTING BRACKET
0: Without
1: With

PACKAGE INCLUDES...
• Mounting screws
    Bolt (M8 x 15): 4
    Spring washer for M8: 4
  Material: Stainless steel 304
• Mounting bracket assembly (option):
    Mounting bracket: 1
    M10 U-bolt: 2
    Nut for M10: 4
    Spring washer for M10: 4
  Material: Stainless steel 304
  Applicable pipe: 1 1/2” min.; 2” max.

GENERAL SPECIFICATIONS
Degree of protection: NEMA 4X, IP66/IP67
Wiring conduit: See ‘Ordering information.’
Electrical connection: M3 screw terminals
(torque 0.6 N·m)
Materials
Transmitter housing: Diecast aluminum
   Screw terminals: Nickel-plated steel
Enclosure: Diecast aluminum or stainless steel casting (equivalent to type 316); silver color, epoxy resin coated
Isolation: Input or output to outdoor enclosure
Output limit: Approx. 120 %
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
Input: Potentiometer; 100 Ω – 20 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) – 13 (V)) ÷ 0.02 (A)
(including leadwire resistance)

INSTALLATION
Supply voltage: 13 – 28 V DC
Operating temperature: -5 to +70°C (23 to 158°F)
Weight
• Unit
  Approx. 1.5 kg (2.9 lb), aluminium
  Approx. 4.2 kg (8.8 lb), stainless steel
• Mounting bracket assembly (option)
  Approx. 0.78 kg (1.72 lb)

PERFORMANCE in percentage of span
Accuracy: ±0.2 %
  Linearity (En %) is added to the above items
  for potentiometer 2 – 20 kΩ.
    En = 0.07 R % where
    R = potentiometer total resistance (kΩ)
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)
Response time: ≤ 0.5 sec. (0 – 90 %)
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @ 1 minute
(input or output to outdoor enclosure )

EXTERNAL DIMENSIONS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.