SITRANS LR200 (HART) Quick Start Manual - Siemens
SITRANS LR200 (HART) Quick Start Manual - Siemens
SITRANS LR200 (HART) Quick Start Manual - Siemens
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• Approved dust-tight and water-tight conduit seals are required for outdoor NEMA 4X /<br />
type 4X / NEMA 6, IP67, IP68 locations.<br />
• The maximum input voltage to the barrier must not exceed 250 V rms.<br />
• Recommended intrinsically safe barriers are listed on page 9.<br />
• Refer to Instructions specific to hazardous area installations on page 10.<br />
EU Equivalency (barrier selection)<br />
Any zener diode safety barrier, certified by an EU approved certification body to [ EEx ia ] IIC,<br />
its output voltage (U o ) not exceeding 30 V and its output current (I o ) limited by load resistance<br />
(R o); such that I o = U o / R o, does not exceed 120 mA.<br />
IS Safety Barrier Selection<br />
Selecting a suitable barrier or power supply requires knowledge about Intrinsic Safety and the<br />
application. It is the responsibility of the installer to ensure that the intrinsically safe<br />
installation complies with both the apparatus approval requirements and the relevant national<br />
code of practice.<br />
How to select a passive barrier for <strong>SITRANS</strong> <strong>LR200</strong><br />
1. Make sure that the barrier safety description is suitable for the <strong>LR200</strong> Intrinsically Safe<br />
(IS) input parameters.<br />
2. Determine the maximum end-to-end resistance of the barrier (Re-e) from the data sheet.<br />
3. Determine other loop resistance (Rloop): for example, sense resistance, displays, and/or<br />
PLC inputs.<br />
4. Calculate Rworking = Re-e + Rloop.<br />
5. Determine any non-linear voltage drops due to the barrier (Vbarrier) from the barrier data<br />
sheet (for example, voltage drops due to diodes).<br />
6. Calculate Vworking = Vsupply – Vbarrier.<br />
7. Using Vworking and Rworking, confirm that operation is within the shaded area of the<br />
graph Loop Voltage versus Loop Resistance on page 5 of Appendix A.<br />
Notes:<br />
• The following list is not complete: there are many safety barriers on the market, which<br />
will work with the <strong>LR200</strong>.<br />
• The barriers listed below have all been tested and are functionally compatible with the<br />
LR 200.<br />
• The barriers listed below are all <strong>HART</strong> compatible.<br />
PLC Input Modules<br />
Manufacturer Part Number<br />
<strong>Siemens</strong> SM331 PCS7 <strong>HART</strong> Input Module<br />
7ML19985QL83 <strong>SITRANS</strong> <strong>LR200</strong> (<strong>HART</strong>) – QUICK START MANUAL Page EN-9<br />
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