Dwyer MTL5045 User Manual
Page 18
14
INM5000-6 Jul 2010
6.4.2
Outputs
The output 1 relay reflects the status of the input and may be configured
to operate in reverse phase (PR) or with line-fault detection (LF). The
output 2 relay may be configured either to follow (slave mode) output 1
or as a line-integrity monitor (LFD) (see 6.4.3).
6.4.3
Line fault detection
(See section 3.1.4 for definition of a line fault)
Line-fault detection and the operational mode of output 2 (ie slave to
output 1 or LFD) are selected by switches located on the top of the
module (see figure 6.8).
When LFD is selected for output 2 and there is a line fault in the sensor
circuit the output 2 relay is de-energised (providing an alarm output).
When LF is selected for output 1, the output 1 relay is de-energised if
there is a line fault in the sensor circuit. Note that resistors must be fitted
when using LFD with a contact input; 500
Ω to 1kΩ in series, and 20kΩ
to 25k
Ω in parallel with the switch.
6.4.4
Testing
Make the relevant safe- and hazardous-area connections shown in figure
6.9 for the tests listed in table 6.3. (Figure 6.8 shows the switch positions
for configuring output 2 slave/LFD, output 1 line fault (LF) and phase
reversal (PR)).
Table 6.3
6.5
MTL5015 solid-state two-channel
switch/proximity detector with line
fault detection and phase reversal
The MTL5015 enables each of two safe-area loads to be controlled,
through a solid-state output, by a switch or proximity detector in a
hazardous area. Line fault detection (LFD) and output phase reversal
(see 3.1.3) facilities are included.
6.5.1
Wiring connections
See figure 6.10 for wiring connections.
Phase
Line fault
Output 1
Output 2
Status
Fault
reverse
detection
Slave
Input test switch position
relay
relay
LED
LED
Test
switch (PR)
(LF)
(LFD)
(terminals 1 & 2)
(11-12)
(9-8)
(yellow)
(red)
1
Normal
Off
LFD
(a) i.e. short-circuit
Closed
Open
On
On
2
Reverse
Off
LFD
(a) short-circuit (I
sc
=7–9mA)
Open
Open
Off
On
3
Normal
On
Slave
(a) short-circuit
Open
Open
Off
On
4
Normal
Off
Slave
(a) short-circuit
Closed
Closed
On
Off
5
Normal
Off
Slave
open-circuit (V
oc
=7V5–9V5)
Open
Open
Off
Off
6
Normal
On
Slave
open-circuit
Open
Open
Off
On
7
Normal
Off
LFD
(b) 22k
Ω
Open
Closed
Off
Off
8
Normal
Off
LFD
(c) 680
Ω
Closed
Closed
On
Off
LF
PR
O/P1
ON
SLAVE LFD
Output 2
MTL5014
PWR
Ou
tpu
t 1 f
oll
ow
s
sensor
Ou
tpu
t 2
slav
es
o
ut
pu
t 1
Ou
tpu
t 1 f
oll
ow
s
sensor
Ou
tpu
t 2 m
on
itors
LFD
Ou
tpu
t 1 f
oll
ow
s
sensor
& LFD
Ou
tpu
t 2
slav
es
o
ut
pu
t 1
Ou
tpu
t 1 f
oll
ow
s
sensor
& LFD
Ou
tpu
t 2 m
on
itors
LFD
Ou
tpu
t 1 i
n pha
se
wi
th
sensor
Ou
tpu
t 1 i
n a
nt
i-pha
se
wi
th
sensor
(LFD
not
aff
ecte
d)
6
5
4
3
2
1
7
8
9
10
11
12
13
14
Vs
Vs+
20 to 35V dc
Output 2
relay
Output 1
relay
To earth
leakage
detector
SW
22kW
680W
a
b
c
+
open
Terminal
Function
1
Input –ve (Ch 1)
2
Input +ve (Ch 1)
3
Earth leakage detection
4
Input –ve (Ch 2)
5
Input +ve (Ch 2)
6
Earth leakage detection
8
Output –ve (Ch 2)
9
Output +ve (Ch 2)
11
Output –ve (Ch 1)
12
Output +ve (Ch 1)
13
Supply –ve
14
Supply +ve
6
5
4
3
2
1
7
8
9
10
11
12
13
14
To earth leakage
detector
SW
22kW
680W
a
b
c
open
22kW
+
Vs
Vs+
20 to 35V dc
} V
d2
1kW
1kW
+
+
} V
d1
Ch1
Ch2
+
Figure 6.8: Top label of MTL5014 with explanation of switch positions
Figure 6.9: Test circuit for MTL:5014
Figure 6.11: Test circuit for MTL5015
6
5
4
3
2
1
7
8
9
10
11
12
13
14
Vs
Vs+
20 to 35V dc
To earth
leakage
detector
22kW
680W
+
Resistors required only
for line fault detection
Ch 2
22kW
680W
+
Ch 1
+
+
Figure 6.10: MTL5015 wiring diagram and connections
Hazardous area
Safe area