MTL5516C SWITCH/PROXIMITY DETECTOR INTERFACE

MTL5516C SWITCH/PROXIMITY DETECTOR INTERFACE

two-channel, with line fault detection

MTL5516C SWITCH/PROXIMITY DETECTOR INTERFACE enables two safe-area loads to be controlled by a switch or proximity detector located in a hazardous-area. When selected, open or short circuit conditions in the field wiring are detected by the line-fault-detect (LFD) facility and also indicated on the top of the module. Phase reversal for each channel is selected by a switch on the side of the module and output is provided by changeover relay contacts.

MTL5516C SWITCH/PROXIMITY DETECTOR INTERFACE SPECIFICATION

See also common specification

Number of channels
   Two
Location of switches
   Zone 0, IIC, T6 hazardous area
   Div. 1, Group A hazardous location
Location of proximity detector
   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
     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. Line faults
   are indicated by an LED for each channel. The channel output
   relay is de-energised if an input line fault is detected.
   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 output
   Two single-pole relays with changeover contacts
   Note: reactive loads must be adequately suppressed
Relay characteristics
   Response time: 10ms maximum
   Contact rating: 250V ac, 2A, cosØ >0.7
                   40V dc, 2A, resistive load
* Signal plug HAZ1-3 is required for access to this function

MTL5516C SWITCH/PROXIMITY DETECTOR INTERFACE
LED indicators
   Green: power indication
   Yellow: two: channel status, on when output is energised
   Red: two: LFD indication, on when line fault detected
Maximum current consumption
   35mA at 24V
Power dissipation within unit
   0.84W at 24V
Safety description (each channel)
   Vo=10.5V Io=14mA Po=37mW Um = 253V rms or dc

MTL5516C SWITCH/PROXIMITY DETECTOR INTERFACE