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3118
 

3118

 

Bipolar isolated converter / splitter

 

  • Conversion of voltage and current bipolar process signals to
    uni-/bipolar signals
  • Multiple signal ranges are selectable via DIP-switches
  • Splitter function: 1 signal in and 2 signals out
  • Excellent accuracy, better than 0.05 % of selected range and high output load stability
  1. Overview

  2. Technical details

  3. Accessories


Application

  • The 3118 is an isolating converter and splitter which can be used for signal conversion of standard bipolar analog process signals into two individual unipolar analog signals.
  • The unit offers 4-port isolation and provides surge suppression and protects control systems from transients and noise.
  • The 3118 also eliminates ground loops and can be used for measuring floating signals.
  • Mounting of the 3118 can be in Safe area or in Zone 2 and Cl. 1 Div 2 area and is approved for marine applications.
  • The analog output can be easily configured and programmed to be bipolar in the ranges ±10 mA and ±20 mA (*special setup).

Technical characteristics

  • Flexible 24 VDC (±30%) supply via power rail or connectors.
  • Excellent conversion accuracy, better than 0.05% of selected range.
  • A green front LED indicates operation status for the device.
  • All terminals are protected against overvoltage and polarity error.
  • Meeting the NAMUR NE21 recommendations, the 3118 ensures top measurement performance in harsh EMC environments.
  • High galvanic isolation of 2.5 kVAC.
  • Fast input to output response time < 7 ms / > 100 Hz – 10 Hz bandwidth damping possible via DIP-switch.
  • Excellent signal/noise ratio > 60 dB.

Mounting / installation / programming

  • Easy configuration of factory calibrated measurement ranges via DIP-switches.
  • A very low power consumption allows DIN rail mounting without the need for any air gap.
  • Wide temperature operation range: -25...+70°C.

Environmental Conditions

Operating temperature -25°C to +70°C
Storage temperature -40°C to +85°C
Calibration temperature 20...28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP20
Installation in Pollution degree 2 & measurement / overvoltage cat. II

Mechanical specifications

Dimensions (HxWxD) 113 x 6.1 x 115 mm
Weight approx. 70 g
DIN rail type DIN EN 60715/35 mm
Wire size 0.13 x 2.5 mm2 / AWG 26...12 stranded wire
Screw terminal torque 0.5 Nm

Common specifications

Supply

Supply voltage 16.8...31.2 VDC
Max. required power 0.8 W
Internal power dissipation 0.4 W (typ.) / 0.65 W (max.)

Isolation voltage

Isolation voltage, test / working 2.5 kVAC / 300 VAC (reinforced)
Zone 2 / Div. 2 250 VAC

Response time

Response time (0...90%, 100...10%) < 7 ms or < 44 ms
MTBF, acc. to IEC 61709 (SN29500) > 187 years
Signal / noise ratio > 60 dB
Programming DIP-switches
Cut-off frequency (3 dB) > 100 Hz or 10 Hz (selectable via DIP-switch)
Accuracy < ±0.05% of span
Temperature coefficient < ±0.01% of span / °C
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span

Input specifications

Current input

Measurement range -23...+23 mA
Programmable measurement ranges ± 10 and ± 20 mA
Input voltage drop < 1 VDC @ 23 mA

Voltage input

Programmable ranges ±5 and ±10 V
Functional range -11.5...+11.5 V
Input resistance ≥ 1 MΩ

Output specifications

Current output

Signal range 0...23 mA
Programmable signal ranges 0 / 4...20 mA
Load (@ current output) ≤ 300 Ω
Load stability ≤ 0.002% of span / 100 Ω
Current limit ≤ 28 mA

Voltage output

Programmable signal ranges 0/1...5 and 0/2...10 V
Functional range 0...11.5 V
Load (@ voltage output) ≥ 10 kΩ
Bipolar wiring and programming set-up ±10 and ± 20 mA
*of span = of the presently selected range

Observed authority requirements

EMC 2014/30/EU
LVD 2014/35/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011

Approvals

ATEX 2014/34/EU KEMA 10ATEX0147 X
IECEx KEM 10.0068X
FM FM17US0004X / FM17CA0003X
DNV-GL Marine Stand. f. Certific. No. 2.4 V1-7-2
UL UL 61010-1
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