3185
Loop powered isolator
- 1 or 2 channel input loop powered isolator
- Signal 1:1 functional range 0...23 mA
- Low input voltage drop and fast response time
- Excellent accuracy and high load stability
- Slimline 6 mm housing
Manuals : 
Data sheet :
Application
- 1:1 input loop powered isolator of current signals in the range 0(4)...20 mA.
- 3185 is an easy mounting DIN rail unit.
- A very competitive choice in terms of both price and technology for galvanic isolation of current signals.
- Provides surge suppression and protects control systems from transients and noise.
- 3185 eliminates ground loops and can be used for measuring floating signals.
- The device can be mounted in Safe area or in Zone 2 and Cl. 1 Div 2. area.
Technical characteristics
- 3185 is powered by the analog input current signal loop.
- Low input voltage drop, typ 1.35 V + Vout.
- Excellent conversion accuracy, better than 0.1% in the range 0…20.5 mA.
- Functional range is 0...23 mA which means that 3185 is NAMUR NE43 compliant.
- Inputs and outputs are floating and galvanically separated.
- The output is voltage limited to 17.5 VDC.
- High galvanic isolation of 2.5 kVAC.
- Fast response time < 5 ms.
- Excellent signal/noise ratio > 60 dB.
Mounting / installation / programming
- DIN rail mounting with up to 330 channels per meter.
- Temperature operation range is from -25...+70°C.
Environmental Conditions
Specifications range -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
Internal consumption, per channel 30 mW Isolation voltage, test 2.5 kVAC Isolation voltage, working 300 VAC (reinforced) / 250 VAC (Zone 2, Div. 2) Signal / noise ratio > 60 dB Cut-off frequency (3 dB) 100 Hz Response time (0...90%, 100...10%) < 5 ms EMC immunity influence < ±0.5% of span Extended EMC immunity: NAMUR NE 21, A criterion, burst < ±1% of span Input specifications
Signal range, input to output 0...20.5 mA Signal conversion 1:1 Functional range, current input 0...23 mA Start up current, typ. 10 uA Current input overload, max. 50 mA Input to output voltage drop, typ. 1.25 V + (0.015 x Vout.) (Vout. = Iout.xRoutput load) Input voltage drop (Unit voltage drop) + Vout. Output specifications
Output load, max. 600 Ω Output load stability < 0.01% of span / 100 Ω Voltage limit 17.5 V *of span = 0...20 mA Approvals
EMC EN 61326-1 LVD 2006/95/EC EN 61010-1 ATEX 2004/108/EC KEMA 10ATEX0147 X IECEx KEM 10.0068X FM 3041043-C EAC TR-CU 020/2011 EN 61326-1 DNV Marine Stand. f. Certific. No. 2.4 GL V1-7-2 UL UL 61010-1