Hazardous area Safe area
MTL5017 SWITCH/
PROXIMITY DETECTOR
INTERFACE
two-channel, with line fault detection and
LFD
phase reversal 680Ω +
6
5
LFD
7
8
Ch 2 22kΩ Ch 2
– 4 9
To earth leakage detector 10
+
3 LFD
680Ω 2 11
Ch 1 Ch 1
The MTL5017 enables two safe-area loads to be controlled by two 22kΩ
– 1 12
switches or proximity detectors located in a hazardous area. Two 13 Vs–
20 to 35V dc
single-pole relay outputs are provided. Independent phase reversal 14 Vs+
control is available on each channel, allowing an alarm condition
(output open) to be signalled for either state of the sensor. The
automatic line fault detect (LFD) facility detects an open or short circuit
For contact input, resistors must be fitted
in either field circuit.
SPECIFICATION Terminal Function
See also common specification 1 Input –ve (channel 1)
2 Input +ve (channel 1)
Number of channels
Two 3 Earth leakage detection
Location of switches 4 Input –ve (channel 2)
Zone 0, IIC, T6 hazardous area 5 Input +ve (channel 2)
Div. 1, Group A hazardous location 7 Line fault detection
Location of proximity detectors 8 Output (channel 2)
Zone 0, IIC, T4–6 hazardous area if suitably certified 9 Output (channel 2)
Div. 1, Group A hazardous location 10 Line fault detection
Safe-area output 11 Output (channel 1)
Two relays with normally-open contacts signal status of input 12 Output (channel 1)
An additional relay signals line faults 13 Supply –ve
Hazardous-area input 14 Supply +ve
Two inputs conforming to NAMUR/DIN 19234 standards for
proximity detectors
Resistors must be fitted externally to contact inputs: 500Ω to 1kΩ
in series with the switch, 20kΩ to 25kΩ in parallel with the switch. Maximum power dissipation within unit
Voltage applied to sensor 1.1W at 24V
7.0 to 9.0V from 1kΩ ±10% 1.25W at 35V
Output characteristics Safety description (each channel)
Normal (reverse) phase: 10.5V, 800Ω, 14mA, Um = 250V rms or dc
output relay closed (open) if Iin >2.1mA or Rin <2kΩ
output relay open (closed) if Iin <1.2mA or Rin >10kΩ
Hysteresis: 250µA typical
Line fault detection (LFD)
Line faults are indicated by an LED and a safe-area relay. When
a line fault is detected, the relay opens and the LED lights.
Open-circuit alarm on if Iin<100µA
Open-circuit alarm off if Iin>250µA
Short-circuit alarm on if Rin<100Ω
Short-circuit alarm off if Rin>360Ω
Note: For contact input, resistors must be fitted
500Ω to 1kΩ in series with switch
20kΩ to 25kΩ in parallel with switch
Phase reversal
Independent on each channel, selected by switches on the base
of the unit
Relay type
Single-pole, normally-open contacts.
Note: reactive loads must be adequately suppressed.
Relay characteristics
Response time: 2ms maximum
Contact rating: 10VA, 45mA, 250V ac
10W, 0.5A, 220V dc
Contact life expectancy: 107 operations at maximum load
LED indicators
Green: power indication
Yellow: two: status of each channel, on when output relay is
closed
Red: two: line fault detected in channel 1/channel 2
Supply voltage
20 to 35V dc
Maximum current consumption
50mA at 24V
55mA at 20V
40mA at 35V
EUROPE (EMEA) Tel: +44 (0)1582 723633 Fax: +44 (0)1582 422283
AMERICAS Tel: +1 603 926 0090 Fax: +1 603 926 1899
ASIA PACIFIC Tel: +65 487 7887 Fax: +65 487 7997
June 2004
E-mail: enquiry@mtl-inst.com Web site: www.mtl-inst.com
