SEM 1500P

	RTD Input BS EN 60751
	2, 3, or 4 Wire Input
	High Performance
	Fully Linearized
	Small Size
	4 to 20 ma Output

RTD TRANSMITTER, 2 3 and 4 WIRE SEM1500P Series

INTRODUCTION
The SEM1500P is a series of DIN rail mounted transmitters designed to accept RTD temperature sensors and to convert them to the industry standard 4 to 20 ma transmission signal. Units are supplied factory set to any one of six standard ranges or can be easily user calibrated to provide virtually any range from -292 to 1112 ºF, minimum range is 50 ºF. Non standard ranges can be supplied, factory set, at a nominal extra cost.

High accuracy is achieved by using active two, three or four wire bridge arrangements which effectively remove any errors associated with the sensor connecting cables.

The small size of the unit enables many more units to be installed in a smaller space than was previously possible.

INPUT SPECIFICATION @ 68 °F

.RTD (Pt100)
.Sensor	.Pt100 Platinum Resistor
	.BS EN 60751 (IEC751)
	.BS 1904 (DIN43760)
	.other available on request
SEM1503P.	.2 or 3 wire
SEM1504P.	.2 or 4 wire
.Accuracy	.±0.27 ºF ±% reading as follows
Accuracy % of reading.	0.4		0.2		0.1		0.2		0.4
Temperature ºF.	-292	-148		32		392		932		1112
.Burn Out	.UP scale standard
.Excitation Current	.SEM1503P 2 ma nominal
	.SEM1504P 1 ma nominal

OUTPUT

.Type	.Passive 2 wire current output
.Range	.4 to 20 ma (30 ma max.)
.Protection	.Reverse connection plus over voltage

GENERAL SPECIFICATIONS

.Supply	.10 to 30 VDC
.Load	.700 ohms @ 24 V
.Thermal Stability	.50ppm/ºF
.Ripple Refection	.<40 µA/V (measured at 1V ripple 60 Hz)
.Response time	.100 ms to reach 70% of final value
.Temperature	.Ambient 32 to 158 ºF
.Relative Humidity	.Ambient 10-95% non-condensing

APPROVALS

.EMC	.Emissions	.BS EN 50081
.EMC	.Susceptibility	.BS EN 50082

ENCLOSURE

.Case Material	.Polyamide (Grey)
.Case Flammability	.To UL94-VO VDE 0304 Part 3 Level IIIA
.Mounting	.Top Hat rail to DIN EN 50022-35
.Protection	.IP20
.Connections	.Captive screw connections
.Cable Size	.12 AWG solid / 14 AWG stranded

STANDARD RANGES
The SEM1500P Series may be purchased pre-ranged to any of the following standard ranges:

RANGE ºF		RANGE ºC
from	to	from	to
-22	+95	-30	+35
-12	+167	-25	+75
32	122	0	50
32	212	0	100
32	392	0	200
32	752	0	400

NON STANDARD RANGES
Units can be supplied set up to other non-standard ranges for a small extra charge or alternatively the unit can easily be re-ranges as follows:
ADJUSTMENTS (Range selection)
Range selection GAIN and OFFSET Coarse settings are made by two 16 position rotary screw adjustment switches on the side of the unit.
Fine adjustment is by front access potentiometers. Full re-calibration details are supplied with each transmitter.

INPUT type	OFFSET RANGE ºF	GAIN RANGE ºF	OFFSET RANGE ºF	GAIN RANGE ºF
100 ohm platinum	4 ma	4 to 20 ma	4 ma	4 to 20 ma
Pt-100	-148 to +428 ºF	75 to 1112 ºF full accuracy	-100 to +220 ºC	25 to 600 ºC full accuracy

DOWNLOADS
SEM1500P Instruction Manual

SEM1500P Literature

ORDER CODE

SEM1503P /

value @ 4 ma /

value @ 20 ma /

ºF or ºC