Troubleshooting Guide
Problem
Relay will not Energize, LED does not “Light Up”
Possible Solutions
AC power is not applied to the
LRB terminal block correctly.
Check input power connection
table
Sensing head is not aligned or
gapped properly.
See pages 1 & 2. Figures 1,
2, 3, 4
The set point is not in the
proper range.
See page 2, Figure 5
Shaft is not turning faster than the
set point.
Check actual RPM.
Sensing head is not wired
correctly to the LRB Speed Switch.
Check Sensor Connection
table on page 2 for correct
wiring
Sensor Supply Voltage is not
present.
Check for approx. 12 VDC
between TB5 & TB7
LRB Speed Switch is not
receiving signal.
Check for approx. 2.5 VDC
between TB6 & TB7 with
shaft running
LRB 1000/2000 Specifications:
Input Voltage ±10%
Input Current
Fuse Type
LRB1000/2000 (with standard ESI sensors)
115 & 230 Vac, 60 Hz
2.5 vA
0.032A Slo-Blo 5X20
LRB1000 (with standard ESI sensors)
12 & 24 Vdc
45 mA
80 mA Slo-Blo 5X20
LRB2000 (with standard ESI sensors)
12 & 24 Vdc
75 mA
125 mA Slo-Blo 5X20
Input Signal
Parameters
Type
Open Collector/Logic
Amplitude
5V Pull-Up
Pullup
2200 Ohms to 5V
Max Frequency Input
500Hz **
Min. Pulse Width
1 mSec
Set Point Data
Parameters
Number of Set Points
One or Two
Actuation State
Under or Over Speed
Set Point RPM Range
1 - 99 RPM
10 - 990 RPM **
Adjustment
Rotary Switches:
1 (10x)
1 (1x)
Set Point Accuracy
0.005% @ Low range
0.25% @ Mid Range
0.5% @ Top Range
Hysteresis
6.6% **
Contact Arrangement:
LRB 1000:
LRB 2000:
One Form C, SPDT
Two Form C, SPDT
Relay Contact Rating
5 Amp @ 30 Vdc, or 250 Vac
resistive
Start Delay
10 Seconds (Fixed) **
Physical/Enviroment
Parameters
Electrical Connection
11 - Position DIN Rail Terminal
Block
Operating Temperature
-40°C to +60°C
Storage Temperature
-65°C to +125C
Mounting
DIN Rail Mount or Stand Alone
Enclosure Rating
NEMA 1
UL508 Approved
UL File# E254289
906 Sensor
Parameters
Body Material
Aluminium
Bracket Material
Steel
Thread Size
3/4 - 16 UNF
Output Type
Open Collector, Current Sinking
20 Ma Max
Signal Cable
3 - Conductor Shielded 10 ft.
supplied std.
Max Cable Length
1500 Ft.
Operating Temperature
-40°C to +60°C
Air Gap
1/4 in. +/- 1/8 in.
907 Explosionproof
Sensor (optional)
Parameters **
Class I, Div 1, Group D
Class II, Div 1, Groups E, F, G
UL File: E249019
Mounting Bracket Material Plate Steel U-Bolt Assembly
Other Specifications
Similar to 906 standard sensor
Pulser Disc
Parameters
Material
Nylon 12 Std.
Aluminum Optional
Operating Temperature
-40°C to +60°C
Maximum Speed
Consult Factory
Pulser Wrap
Parameters
Material
Consult Factory
Operating Temperature
-40°C to +60°C
Maximum Speed
Consult Factory
Specifications are subject to change without notice.
*For higher temperature ranges, consult factory.
** Other settings available, consult factory.
4-4
Free Catalog and Application Assistance
1.800.328.6170
Website: www.electro-sensors.com
990-001300 Revision E
