Dwyer MTL5045 User Manual
Page 21
17
INM5000-6 Jul 2010
6.9.3
Testing
Make the safe- and hazardous-area connections shown in figure 6.19,
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 6.7.
6.10
MTL5021 loop-powered
solenoid/alarm driver, IIC
The MTL5021 enables a device located in the hazardous area to be
controlled by a switch located in the safe area. Suitable for IIC
applications.
610.1
Wiring connections
See figure 6.20 for wiring connections.
6.10.2
Testing
Make the safe- and hazardous-area connections shown in figure 6.19,
apply 24V to terminals 11 and 12 and, with no load, check voltage and
short-circuit current levels at terminals 1 and 2 as follows:
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
7
Normally-closed contact (Ch 2)
8
Common (Ch 2)
9
Normally-open contact (Ch 2)
10
Normally-closed contact (Ch 1)
11
Common (Ch 1)
12
Normally-open contact (Ch 1)
13
Supply N
14
Supply L
6
5
4
3
2
1
7
8
9
10
11
12
13
14
680W
22kW
22kW
To earth leakage
detector
SW
a
b
c
open
+
Ch1
Ch2
Vs
Vs
85 to 265V ac
Ch1
Ch 2
+
Phase
Input
Output
Output
Channel
Line fault
reverse
Line fault
switch
relay
relay
status LED
LED
switch
detection
(SW)
(11-12, 8-9)
(10-11, 7-8)
(yellow)
(red)
Normal
Off
a
Closed
Open
On
Off
Reverse
Off
I
sc
= 7 – 9mA
Open
Closed
Off
Off
Reverse
Off
Open
Closed
Open
Off
Off
Normal
On
V
oc
= 7.5 – 9.5V
Open
Closed
Off
On
Normal
On
a
Open
Closed
Off
On
Normal
On
b
Open
Closed
Off
Off
Normal
On
c
Closed
Open
On
Off
Input
Output
Short-circuit
voltage
Status
voltage
current
(terminals 11 & 12)
LED
(terminals 1 & 2) (terminals 1 & 2)
24V dc
On
22 to 24V
—
24V dc
On
—
45 to 52mA
Figure 6.19: Test circuit for MTL5018AC
6
5
4
3
2
1
7
8
9
10
11
12
13
14
Vs
Vs
85 to 265V ac
Ch1
Ch 2
+
22kW
22kW
680W
+
To earth
leakage
detector
Ch 1
Ch 2
680W
Hazardous area
Safe area
Figure 6.18: MTL5018AC wiring diagram and connections
7
8
9
10
11
12
6
5
4
3
2
1
Solenoid, alarm or
other IS device
To earth
leakage
detector
20 35Vdc
+
+
Hazardous area
Safe area
Figure 6.20: MTL5021 wiring diagram and connections
Table 6.7
7
8
9
10
11
12
6
5
4
3
2
1
24Vdc
+
+
V
A
Figure 6.21: Test circuit for MTL5021
Terminal
Function
1
Output –ve
2
Output +ve
3
Earth leakage detection
11
Supply –ve
12
Supply +ve