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Sept 2002
5
See also MTL5000 Series cable parameters and approvals
SPECIFICATION
See also common specification
Number of channels
One
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
Safe-area output
Two relays with changeover contacts
Hazardous-area input
One input conforming to NAMUR/DIN 19234 standards for
proximity detectors
Voltage applied to sensor
7.0 to 9.0V from 1kΩ ±10%
Input/output characteristics
Normal (reverse) phase:
output relay energised (de-energised) if I
in
>2.1mA or R
in
<2kΩ
output relay de-energised (energised) if I
in
<1.2mA or R
in
<10kΩ
Hysteresis: 250µA typical
Phase reversal
User selectable
Relay type
Single pole, 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
Contact life expectancy: 3 x 10
5
operations at maximum load
Line fault detection (LFD)
User selectable: Off or On
A detected line fault de-energises Output 1 relay
Open circuit alarm on if I
in
< 100µA
Short circuit alarm on if I
in
> 6.5mA
Note: Resistors must be fitted when using the LFD facility with a contact input
500
Ω
to 1k
Ω
in series with switch
20k
Ω
to 25k
Ω
in parallel with switch
Output 2 mode
User selectable: Slave or LFD mode
In LFD mode, a line fault de-energises Output 2 relay
Open circuit alarm on if I
in
< 100µA
Short circuit alarm on if I
in
> 6.5mA
See note above on use of resistors
In Slave mode output 2 repeats output 1
Power supply failure protection
Relays de-energised if supply fails
Terminal Function
1 Input –ve
2 Input +ve
3 Earth leakage detection
7 Normally closed (output 2)
8 Common (output 2)
9 Normally open (output 2)
10 Normally closed (output 1)
11 Common (output 1)
12 Normally open (output 1)
13 Supply –ve
14 Supply +ve
MTL5014 SWITCH/
PROXIMITY DETECTOR
INTERFACE
single-channel, dual-output, with phase
reversal and line fault detection
The MTL5014 enables two safe-area loads to be controlled by a
single switch or proximity detector located in the hazardous area. The
safe- area interface has two changeover relays: output 1 and output
2. The output 1 relay reflects the status of the input and may be
configured to operate in reverse phase. The output 2 relay may be
configured either to repeat (slave) the output 1 relay, or to act as a
line integrity monitor. A selectable line-fault-detect (LFD) facility
enables an open- or short- circuit fault to be detected in the field
wiring.
LED indicators
Green: power indication
Yellow: illuminated when output 1 is energised
Red: illuminated when LFD is selected and there is an open or
short circuit in the field wiring
Supply voltage
20 to 35V dc
Maximum current consumption
45mA at 24V
50mA at 20V
35mA at 35V
Maximum power dissipation within unit
1.1W at 24V
1.3W at 35V
Safety description
10.5V, 800Ω, 14mA, U
m
= 250V rms or dc
Hazardous area Safe area