Nexen TL60-A 951243 - Manual (Page 9)

9 FORM NO. L-20138-U-0912
PROXIMITY SENSOR
NOTE: The Nexen Torque Limiter is equipped with
a proximity sensor to detect torque overloads. It
is important that the sensor be positioned so the
dowel pin just moves into the sensor's field of view
when the Torque Limiter is engaged. At this time, the
proximity sensor's output circuit will be closed. When
the Torque Limiter is overloaded, the dowel pin will
move immediately outside the proximity sensor's
field of view and its output circuit will open.
1. Apply air pressure to the Torque Limiter.
2. Rotate the Drive Flange Assembly until the
positioning balls are seated into the detents.
3. Slide the Proximity Sensor (Item 55) on the Bracket
(Item 3) until the LED on the Proximity Sensor is
illuminated.
4. Tighten the screws securing the Proximity Sensor to
the Mounting Bracket.
Align target on
sensor with pin.
M03-.5 Screws
ADJUSTMENTS
FIGURE 11
Dowel
Pin
Mounting Bracket
Mounting
Plate
Proximity
Sensor
ELECTRICAL CONNECTIONS
5. Run the machine to verify proper operation of the
Torque Limiter.
6. If nuisance tripping occurs, realign the proximity
sensor with the Dowel Pin until it operates properly.
PLC
Valve
Torque
Limiter
Prox.
Sensor
Nexen Supplied
Torque
Limiter
Prox.
Sensor
Valve Relay
Nexen Supplied
NOTE: Scan time for PLC on proximity sensor should not exceed 0.07 seconds. FIGURE 9
BU
L2
L1 BN
LOAD
Proximity Sensor Wiring Schematic
FIGURE 10
PROXIMITY SENSOR SPECIFICATIONS
Voltage
20-250 VAC,
10-300 VDC
Line Frequency 40-60 Hz
Voltage Drop Across
Conducting Sensor
<6.0 V at 100 mA
Continuous Load Current <100 mA
Off-State (Leakage)
Current
<1.7 mA
Minimum Load Current 3.0 mA
Maximum Inrush Current 1.0 A (<30 ms, 15% Duty Cycle)
TABLE 5 The supplied Proximity Sensor is shown operating in two
typical scenarios in Figure 9. It is the responsibility of
the system integrator to ensure the limits of the Proximity
Sensor Specifications are followed for integration into a
robust system. See Figure 10 for Proximity Sensor wiring
schematic, and Table 5 for Electrical Specifications.