Bipolar isolated converter/splitter

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

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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).

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.

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.

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 & meas. / overvoltage cat. II

Supply
Supply voltage	16.8...31.2 VDC
Max. required power	≤ 1.2 W
Max. power dissipation	0.43 W
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	Min. 60 dB (0...100 kHz)
Signal dynamics, input	Analog signal chain
Signal dynamics, output	Analog signal chain
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

Current input
Measurement range	-23...+23 mA
Programmable measurement ranges	± 10 and ± 20 mA
Input voltage drop	< 1 VDC @ 23 mA
Voltage input
Measurement range	-11.5...+11.5 V
Programmable ranges	±5 and ±10 V
Input resistance	≥ 1 MΩ

Current output
Signal range	0...23 mA
Programmable signal ranges	0 / 4...20 mA
Bipolar wiring and programming set-up	±10 and ± 20 mA
Load (@ current output)	≤ 300 Ω per channel
Load stability	≤ 0.002% of span / 100 Ω
Current limit	≤ 28 mA
Voltage output
Signal range	0...10 VDC
Programmable signal ranges	0/1...5 and 0/2...10 V
Load (@ voltage output)	≥ 10 kΩ
of span	= of the presently selected range

ATEX	II 3 G Ex ec IIC T4 Gc
IECEx	Ex ec IIC T4 Gc
FM, US	Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, AEx nA IIC T4
FM, CA	Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, Ex nA IIC T4