PR Electronics 3111 – TC Converter – Isolated

features

  • excellent accuracy, better than 0.05% of span
  • slimline housing of 6 mm
  • excellent emc performance and 50/60 hz noise suppression
  • selectable < 30 ms / 300 ms response time
  • pre-calibrated temperature ranges are selectable via dip-switches
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PR Electronics 3111 – TC Converter – Isolated

Application

  • PR Electronics 3111 temperature converter is designed to measure standard TC J and K temperature sensors, offering an isolated analog voltage or current output.
  • High 3-port isolation provides surge suppression, safeguarding the control system from transients and noise.
  • It can be installed in safe areas or Zone 2 / Division 2 hazardous areas.
  • Approved for marine use.

Technical Specifications

  • Operates flexibly with 24 VDC (±30%) via power rail or connectors.
  • Fast response time of less than 30 ms with optional sensor error detection.
  • Selectable 300 ms response time for signal smoothing.
  • Offers internal/external CJC selection.
  • Provides excellent conversion accuracy across all ranges, exceeding 0.05% of span.
  • Meets NAMUR NE21 recommendations for superior performance in demanding EMC environments.
  • Complies with NAMUR NE43 standard for defining out-of-range and sensor error outputs.
  • Green LED indicates operational status and sensor input.
  • Terminals are protected against overvoltage and polarity errors.
  • Features high galvanic isolation of 2.5 kVAC.
  • Boasts a signal-to-noise ratio greater than 60 dB.

Mounting / Installation / Programming

  • Easily configurable with selectable DIP settings, accommodating over 1000 factory-calibrated measurement ranges.
  • Narrow 6 mm housing allows dense mounting—up to 165 units per meter of DIN rail—without gaps.
  • Wide operating temperature range from -25°C to +70°C.

Specification

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 & meas. / 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…2.5 mm2 / AWG 26…12 stranded wire
Screw terminal torque 0.5 Nm
Vibration IEC 60068-2-6
2…25 Hz ±1.6 mm
25…100 Hz ±4 g
COMMON SPECIFICATIONS
Supply
Supply voltage 16.8…31.2 VDC
Max. required power 0.70 W
Max. power dissipation 0.70 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%) < 30 ms / 300 ms (selectable)
Signal / noise ratio Min. 60 dB
Programming DIP-switches
Signal dynamics, input 23 bit
Signal dynamics, output 18 bit
Accuracy Better than 0.05% of selected range
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span
Incorrect DIP-switch setting identification 0 V / 0 mA output; LED 0.5 s / 1 Hz
INPUT SPECIFICATIONS
TC input
Temperature range, TC J -100…+1200°C
Temperature range, TC K -180…+1372°C
Min. measurement range (span) – TC J & K 50°C
Accuracy: the greater of Better than 0.05% of span or 0.5°C
Temperature coefficient: the greater of 0.1°C/°C or ≤ ±0.01%/°C
Sensor cable resistance < 5 kΩ per wire
Cold junction compensation (CJC): Accuracy @ external Pt100 input Better than ±0.15°C
Cold junction compensation (CJC): Accuracy @ internal CJC Better than ±2.5°C
Internal CJC error detection Yes
External CJC error detection Yes – selectable via DIP-switch
Open Thermocouple detection Yes – selectable via DIP-switch
OUTPUT SPECIFICATIONS
Common output specifications
Updating time 10 ms
Current output
Signal range 0…23 mA
Programmable signal ranges 0 / 4…20 mA
Sensor error indication (0…20 mA) 0 mA or 23 mA / OFF
Sensor error indication (4…20 mA) 3.5 mA or 23 mA / acc. to NAMUR NE43 or OFF
Load (@ current output) ≤ 600 Ω
Load stability ≤ 0.01% of span / 100 Ω
Current limitation @ low output load < 60 mA peak / < 4 mA average
Voltage output
Programmable signal ranges 0/1…5 and 0/2…10 V
Sensor error indication 0 V / 10% above the max. / none
Open output < 18 V
I.S. / EX MARKING
ATEX II 3 G Ex nA IIC T4 Gc
IECEx Ex nA 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
EAC Ex 2Ex nA IIC T4 Gc X
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
LVD 2014/35/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011
EAC Ex TR-CU 012/2011
APPROVALS
ATEX KEMA 10ATEX0147 X
IECEx KEM 10.0068X
c FM us FM17US0004X / FM17CA0003X
UL UL 61010-1
DNV-GL Marine TAA00001RW
EAC Ex RU C-DK.HA65.B.00355/19

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