terminal and can switch +ve or –ve polarity signals. A range of module configurations is available (see Table 1) through the use of selector switches. When proximity detector modes are selected, LFD is enabled and the output switches to OFF if a line fault is detected.
MTL4510 SWITCH PROXIMITY DETECTOR INTERFACE MTL4510
SPECIFICATION
See also common specification
Number of channels
4, configured by switches
Location of switches
Zone 0, IIC, T6 hazardous area
Div 1, Group A hazardous location
Location of proximity detectors
Zone 0, IIC, T4-6 hazardous area if suitably certified
Div 1, Group A, hazardous location
Hazardous-area inputs
Inputs conforming to BS EN60947–5–6:2001 standards for
proximity detectors (NAMUR)
Voltage applied to sensor
7 to 9V dc from 1kΩ ±10%
Input/output characteristics
Normal phase
MTL4510 SWITCH PROXIMITY DETECTOR INTERFACE MTL4510
Outputs closed if input > 2.1mA (< 2kΩ in input circuit)
Outputs open if input < 1.2mA (> 10kΩ in input circuit)
Hysteresis: 200µA (650Ω) nominal
Line fault detection (LFD) (when selected)
User-selectable via switches on the side of the unit.
Open-circuit alarm on if Iin < 50µA
Open-circuit alarm off if Iin > 250µA
Short-circuit alarm on if Rin < 100Ω
Short-circuit alarm off if Rin > 360Ω
Note: Resistors must be fitted when using the LFD facility with a contact input
500Ω to 1kΩ in series with switch
20kΩ to 25kΩ in parallel with switch
Safe-area outputs
MTL4510 SWITCH PROXIMITY DETECTOR INTERFACE MTL4510
Floating solid-state outputs compatible with logic circuits
Operating frequency: dc to 500Hz
Max. off-state voltage: ± 35V
Max. off-state leakage current: ± 50µA
Max. on-state resistance: 25Ω
Max. on-state current: ± 50mA
LED indicators
Green: power indication
Yellow: four: on when output active
Red: LFD indication + faulty channel’s yellow LED flashes
Maximum current consumption
40mA at 24V (with all output channels energised)
Power dissipation within unit
0.96W at 24V, with 10mA loads
Safety description (each channel)
Uo=10.5V Io=14mA Po=37mW Um = 253V rms or dc
MTL4510 SWITCH PROXIMITY DETECTOR INTERFACE MTL4510
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