Dwyer MTL5045 User Manual
Page 19
15
INM5000-6 Jul 2010
Table 6.4
6.5.2
Line fault detection
(See section 3.1.4 for definition of a line fault)
On both channels, input line faults (open- or short-circuit) are indicated
by an LED and the de-energising of the output. LFD is enabled/disabled
by switches located on top of the module. Note that if the LFD facility is
enabled for switch inputs, the resistors shown in figures 6.10 and 6.11
MUST be fitted.
6.5.3
Testing
Make the safe- and hazardous-area connections shown in figure 6.11
and check the status of the output contacts for each channel in turn (with
a 22k
Ω resistor connected to the other channel) as shown in table 6.4.
6.6
MTL5016 single-pole relay two-
channel switch/proximity detector
with phase reversal (Discontinued,
use MTL5018)
The MTL5016 enables two safe-area loads to be relay-controlled by two
switches or proximity detectors located in a hazardous area. Output
phase reversal (see 3.1.3) is provided.
Table 6.5
6.6.1
Wiring connections
See figure 6.12 for wiring connections.
Note: Reactive loads must be adequately suppressed.
6.6.2
Testing
Make the safe- and hazardous-area connections shown in figure 6.13
and check status LEDs and relay contacts as in table 6.5.
6.7
MTL5017 single-pole relay two-
channel switch/proximity detector
with line fault detection and phase
reversal
The MTL5017 is similar to the MTL5018 but with the addition of line fault
detection facilities.
6.7.1
Wiring connections
See figure 6.14 for wiring connections.
Note: Reactive loads must be adequately suppressed.
6.7.2
Line fault detection
(
See section 3.1.4 for definition of a line-fault)
Line faults de-energise a dedicated line fault detect relay (between
terminals 7 and 10) to provide an alarm facility and are indicated by an
LED. Each channel relay will also de-energise (open) when a line fault
exists on that channel. LFD is automatic. Note that for switch inputs the
resistors shown in figures 6.14 and 6.15 MUST be fitted for correct LFD
operation.
Phase
Input
Output
Channel
Line fault
reverse
Line fault
switch
status
status LED
LED
switch
detection
(SW)
(11-12, 8-9)
(yellow)
(red)
Normal
Off
a
V
d
<4V
On
Off
Reverse
Off
a
V
d
=V
S
Off
Off
Reverse
Off
open
V
d
<4V
On
Off
Normal
On
open
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
Phase reverse Phase reverse
Channel 1
Channel 2
Relay
Relay
Input switch
Input switch
switch
switch
status LED
status LED
contacts
contacts
(ch 1)
(ch 2)
(ch 1)
(ch 2)
(yellow)
(yellow)
(ch 1)
(ch 2)
Closed
Open
Normal
Normal
On
Off
Closed
Open
Closed
Closed
Normal
Normal
On
On
Closed
Closed
Closed
Closed
Reverse
Reverse
Off
Off
Open
Open
Open
Open
Reverse
Reverse
On
On
Closed
Closed
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)
8
Output (Ch 2)
9
Output (Ch 2)
11
Output (Ch 1)
12
Output (Ch 1)
13
Supply –ve
14
Supply +ve
3
2
1
6
5
4
7
8
9
10
11
12
13
14
Vs
Vs+
20 to 35V dc
+
SW1
SW2
Ch1
Ch2
+
Figure 6.13: Test circuit for MTL5016
3
2
1
6
5
4
7
8
9
10
11
12
13
14
Vs
Vs+
20 to 35V dc
+
To earth leakage
detector
Ch1
Ch2
Ch1
Ch2
+
Figure 6.12: MTL5016 wiring diagram and connections
Hazardous area
Safe area