SITRANS I100, isolating power supply Siemens

Обзор

Analog input 0/4 to 20 mA

The isolating power supplies are used for the intrinsically safe operation of 2- and 3-wire transmitters and for connecting to intrinsically safe mA sources.

The 2- and 3-wire transmitters are supplied with auxiliary power from the transmitter supply unit.

For 2-wire transmitters the isolators transfer the HART communication signal bidirectionally.

Дизайн

The HART isolating power supply is comprised of a compact plastic enclosure (IP30) and is equipped with push-in screw terminals.

On the front are a green LED for indicating the power supply status and a red LED for signaling errors.

The auxiliary power supply can be connected individually using push-in screw terminals or jointly for up to 40 units using pac-Bus.

STRANS I100 isolating power supply, function block diagram

Чертеж

SITRANS I100 isolating power supply with HART, dimensions in mm (inch)

Особенности

Active output 0/4 to 20 mA
Suitable for 2-, 3-wire transmitters, 2-wire HART transmitters and mA sources
Intrinsically safe input [Ex ia] IIC
Electrical isolation between input, output and auxiliary power
Open-circuit and short-circuit monitoring and messaging for input and output (can be switched off)
Installation possible in Zone 2 and Div. 2
Can be used up to SIL 2 (IEC 61508)

	Zones
	0	1	2	20	21	22
Ex i interfaces	X	X	X	X	X	X
Installation in			X			X

Схема подключения

SITRANS I100 isolating power supply with HART, connection diagram

SITRANS I100 isolating power supply with HART, output configuration

Технические данные

SITRANS I100 Isolating Power Supplies with HART
Ex i input
Input signal	0/4 ... 20 mA with HART
Functional range	0 ... 24 mA
Max. input current for mA sources	50 mA
Transmitter supply voltage	≥ 16 V at 20 mA (for 2-, 3-wire)
Supply voltage residual ripple	≤ 25 mV_eff
No-load voltage	≤ 26 V
Short-circuit current	≤ 35 mA
Input resistance (AC impedance HART)	≈ 500 Ω
Input resistance for mA sources	30 Ω
Communication signal (on 2-wire transmitters)	Bidirectional HART transmission, 0.5 kHz ... 30 kHz
Output
Output signal	0/4 ... 20 mA with HART
Load resistance R_L	0 ... 600 Ω (terminal 1+/2-) 0 ... 379 Ω (terminal 3+/2) (with internal 221 Ω resistance for HART)
Residual ripple	≤ 40 μA_eff
No-load voltage	≤ 15.5 V
Communication signal	Bidirectional HART transmission, 0.5 kHz ... 30 kHz
Response time (10% ... 90%)	≤ 25 ms
Transmission characteristics Input/output	1:1 (0 ... 20 mA --> 0 ... 20 mA, 4 ... 20 mA --> 4 ... 20 mA)
Measuring accuracy Accuracy, typical data expressed as % of calibrated span at U_N, 23 °C
Linearity error	≤ 0.1%
Offset error	≤ 0.1%
Temperature influence	≤ 0.1%/10 K
Power supply effect within voltage range	≤ 0.01%
Load resistance effect	≤ 0.02%
Rated conditions
Degree of protection of enclosure	IP30
Degree of protection of terminals	IP20
Ambient conditions
Ambient temperature	-20 °C ... +60 °C/+70 °C (-4 ... +140/+158 °F) (see "Operating instructions")
Storage temperature	-40 °C ... +80 °C (-40 ... +176 °F)
Relative humidity (no condensation)	≤ 95%
Electromagnetic compatibility	Tested under the following standards and regulations: EN 61326-1 Use in the industrial environment
Design
Screw terminals
One-wire connection
Rigid	0.2 ... 2.5 mm² (0.00031 ... 0.0039 in²)
Flexible	0.2 ... 2.5 mm² (0.00031 ... 0.0039 in²)
Flexible with end ferrules (without/with plastic ferrule)	0.25 ... 2.5 mm² (0.00039 ... 0.0039 in²)
Two-wire connection
Rigid	0.2 ... 1 mm² (0.00031 ... 0.00155 in²)
Flexible	0.2 ... 1.5 mm² (0.00031 ... 0.0023 in²)
Flexible with end ferrules	0.25 ... 1 mm² (0.00039 ... 0.00155 in²)
Weight	Approx. 160 g (0.35 lb)
Type of installation	On DIN rail according to EN 50022 (NS35/15; NS35/7.5)
Mounting position	Vertical or horizontal
Enclosure material	PA 6.6
Fire protecting class (UL-94)	V0
Auxiliary power
Rated voltage U_N	24 V DC
Voltage range	18 ... 31.2 V
Residual ripple within voltage range	≤ 3.6 V_SS
Rated current (U_N, 20 mA)	70 mA
Power consumption (U_N, 20 mA)	1.7 W
Power loss (at U_N, R_L = 250 Ω)	1.3 W
Operation indicator	Green "PWR" LED
Reverse polarity protection	Yes
Undervoltage monitoring	Yes (no faulty module/output states)
Electrical isolation
Test voltage according to EN 60079-11
Ex i input to output	1.5 kV AC
Ex i input to auxiliary power	1.5 kV AC
Ex i input to Error contact	1.5 kV AC
Test voltage according to EN 50178
Output to auxiliary power	350 V AC
Error contact to auxiliary power and output	350 V AC
Error detection Ex i input
Open circuit	< 2 mA
Short-circuit	> 22 mA
Output characteristics	= Input signal
Output current at I_E = 0	I_A = 0 mA
Error detection output
Open circuit	< 2 mA
Error messaging Ex i input/output
Settings (LF switch)	Activated/deactivated
Error indication	LED red "LF"
Error messaging and power supply failure	Contact (30 V/100 mA), closed to ground in case of error pac-Bus, floating contact (30 V/100 mA)
Certificates and approvals
Explosion protection ATEX
EC type-examination certificate	DMT 03 ATEX E 010 X
Degree of protection	II 3 (1) G Ex nA nC [ia] IIC T4 II (1) D [Ex iaD]
Installation	In Zone 2, Div. 2 and in the safe area
Other approvals	USA (FM) Canada (CSA) Shipping (DNV)
Safety specifications (CENELEC)
Max. voltage U_o	27 V
Max. current I_o	88 mA
Max. power P_o	576 mW
Max. connectable capacitance C_o for IIC/IIB	90 nF/705 nF
Max. connectable inductance L_o for IIC/IIB	2.3 mH/14 mH
Internal capacitance C_i and inductance L_i	Negligible
Insulation voltage U_m	253 V
When connecting mA sources:
Max. output voltage U_o	4.1 V
Max. connectable voltage U_i	30 V
Max. connectable current I_i	100 mA
Internal capacitance Ci and inductance L_i	Negligible
Additional information and value combinations	See Certifications