Dwyer MTL5045 User Manual
Page 17
6.3.3
Testing
Make the safe- and hazardous-area connections shown in figure 6.6
and check as shown in table 6.2
6.4
MTL5014 single-pole changeover
relay single-channel dual-output
switch/proximity detector with line
fault detection and phase reversal
The MTL5014 enables two safe-area loads to be relay-controlled by a
single hazardous-area switch or proximity detector. Phase reversal (see
3.1.3 and figure 6.8), line fault detection and slave/line fault monitoring
configurations are possible.
6.4.1
Wiring connections
See figure 6.7 for wiring connections
Note: Reactive loads must be adequately suppressed.
13
INM5000-6 Jul 2010
6.3.1
Wiring connections
See figure 6.5 for wiring connections.
6.3.2
Line fault detection
(See section 3.1.4 for definition of a line fault)
Input line faults (open- or short-circuit) are indicated by an LED and the
non-conducting of the output. LFD is enabled/disabled by a switch
located on top of the module. Note that if the LFD facility is enabled for
switch inputs, the resistors shown in figures 6.5 and 6.6 MUST be fitted.
Table 6.2
Terminal
Function
1
Input –ve
2
Input +ve
3
Earth leakage detection
10 &11
Output –ve
12
Output +ve
13
Supply –ve
14
Supply +ve
+
6
5
4
3
2
1
7
8
9
10
11
12
13
14
Vs
Vs+
20 to 35V dc
To earth
leakage
detector
SW
22kW
680W
a
b
c
+
1kW
V
d
Phase
Input
Output
Channel
Line fault
reverse
Line fault
switch
status
status LED
LED
switch
detection
(SW)
(11-12)
(yellow)
(red)
Normal
Off
a
V
d
< 4V
On
Off
Reverse
Off
I
sc
= 7–9mA
V
d
= V
S
Off
Off
Reverse
Off
Open
V
d
< 4V
On
Off
Normal
On
V
oc
= 7V5–9V5
V
d
= V
S
Off
On
Normal
On
a
V
d
= V
S
Off
On
Normal
On
c
V
d
< 4V
On
Off
Normal
On
b
V
d
= V
S
Off
Off
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
Figure 6.6: Test circuit for MTL5012
+
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
Figure 6.5: MTL5012 wiring diagram and connections
Hazardous area
Safe area
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
+
Output 2
Output 1
For contact inputs
resistors must be fitted
Figure 6.7: MTL5014 wiring diagram and connections
Safe area
Hazardous area