Basler Electric BE3-49R-3 User Manual

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+1 618.654.2341 (USA)

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INTRODUCTION

Three-input BE3 temperature relays use resistance
temperature detectors (RTDs) to monitor remote
temperatures. When any of three monitored temperatures
exceeds a preset limit, the corresponding relay output
operates. A dc metering output indicates the highest
temperature of the three RTDs. BE3 temperature relays are
available for use with 10 Ω copper or 100 Ω platinum RTDs.

SPECIFICATIONS

Operating Power

All units require externa l oper a ting pow er.
Nominal Voltage: 120 Vac, ±25%, 45 to 65 Hz, 2 VA
240 Vac, ±25%, 45 to 65 Hz, 2 VA

24 Vdc, ±20%, galvanically
isolated, <3 W

RTD Inputs

The RTD inputs accommodate two- or three-wire RTDs.
Depending on the style number of the relay, the RTD inputs
accept either 10 Ω copper or 100 Ω platinum RTDs.

Style 5H5X1: 10 Ω copper RTDs
Style 5I5X1: 100 Ω platinum RTDs
The temperature measurement range of each input is 0 to

200°C.

Metering Output

Range: 0 to 1 mAdc
Burden: 5 kΩ maximum

Setpoints

Range: 50 to 100% (±3%) of input

temperature range
Repeatability: Greater than 0.5% of full span
Differential: Fixed at 2%

Outputs

Relay Type: S.P.D.T.
AC Rating: 250 V, 5 A, non-resistive,

1200 VA
DC Rating: 125 V, 1 A, resistive, 120 W
Mechanical Life: 5 million operations

Temperature

Operating Temperature: 0°C (32°F) to 60°C (140°F)
Functional Temperature: –25°C (–13°F) to 70°C (158°F)
Storage Temperature: –40°C (–40°F) to 85°C (185°F)
Temperature Coefficient: 0.03% per °C (300 ppm/°C )

Humidity

Relative Humidity: 95% non-condensing

Model

Physical

Mounting: DIN rail 1.38” by 0.29” (35 mm by

Case: Complies with IEC 529, DIN

Case Material: Complies with UL 94VO
Weight: 1.32 lb (0.59 kg)
Size: 3.94” wide (100 mm)

Agency

cULus listed to UL 508 and CSA C22.2 No. 14
CE compliant
GOST-R certified per the relevant standards of Gosstandart

of Russia

BE3-49R - 3 Inputs

7.5 mm)

40050, BS 5490

OPERATION

Three temperatures are monitored through RTDs connected
at the nine-position front panel connector. RTD connections
are labeled A, B, and C. Three user-adjustable controls are
located on the front panel: SET 1, SET 2, and SET 3. Each
setpoint is adjustable from 50 to 100% (±3%) of the RTD
temperature range. When a setpoint is exceeded, the
corresponding TRIP LED lights and the relay output
energizes. Each RTD has a corresponding LED to identify
which RTD has exceeded the temperature setpoint. For
example, if the temperature of RTDs B and C exceeds the
trip level, the B and C TRIP LEDs light and the relay output
energizes. A green LED labeled AUX indicates the power
supply status. Figure 1 illustrates the BE3-49R controls,
indicators, and terminals.

INSTALLATION

BE3 temperature relays are designed for mounting on
standard DIN rails that comply with DIN-EN 50022.

Mounting involves hooking the top edge of the cutout on the
base of the case over one edge of the DIN rail. The opposite
side of the cutout containing the release clip is then pushed
over the opposite side of the DIN rail. To remove or
reposition the relay, lever the release clip and move the
relay as required. BE3 relays should be installed in a dry,
vibration-free location where the ambient temperature does
not exceed the operating temperature range. Connections to
the relay should be made using wire that meets applicable
codes and is properly sized for the application. Figure 2
illustrates the terminal connections for the BE3-49R
temperature relay.

A burden resistor must be installed across all unused RTD
inputs that are not connected to an actual RTD. For units
with style number 5HXXX, it is suggested that a 10 Ω
resistor be connected across any unused RTD inputs. For
units with style number 5IXXX, it is suggested that a 100 Ω
resistor be connected across any unused RTD inputs. The
minimum power rating for the burden resistors is ¼ W.

Publication

9320500990

Revision

D

Instructions

Date

03/14

Copyright

2014

CALIBRATION

Connections

Proper calibration requires a precision decade resistance
box with 1% accuracy or better. While calibrating the relay,
burden resistors must be connected across the remaining,
open RTD inputs. A temperature and resistance cross­reference table for your RTDs is also needed. Use the
following procedure to calibrate your relay.

1. Adjust the SET control fully counterclockwise.

2. Connect the decade resistance box to RTD input A and

connect a 10 Ω (style 5HXXX) or 100 Ω (style 5IXXX)
burden resistor across the remaining RTD inputs. The
burden resistor power rating should be ¼ W or greater.
Apply nominal external operating power to the relay.

3. Set the decade resistance box at the value that

corresponds to the desired temperature setpoint.

FIGURES

4. Slowly adjust the SET control clockwise until the A and

TRIP LEDs light and the output relay energizes.

5. Repeat Steps 2 through 4 for SET 2 and SET 3.

MAINTENANCE

BE3 relays are solid-state devices that require no
maintenance. In the event that your relay requires repair,
contact Basler Electric, Highland, IL, USA for return
authorization.

ORDERING INFORMATION

Figure 3 shows the BE3 temperature relay style chart.

Figure 1. BE3-49R Controls, Indicators, and Terminals

Figure 2. BE3-49R Auxiliary Pow er ,

Metering Output, and Output Contact

Figure 3. BE3-49R Style Number Identification Chart

Publication

9320500990

Revision

D

Instructions

Date

03/14

Page

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