69
10.2.3 Testing
Make the safe- and hazardous-area connections shown in figure 10.2, and check the status
of the output contacts for each channel in turn (with a 22kΩ resistor connected to the other
channel) as shown in the table 10.1.
Phase
reverse
switch
Line
fault
detection
Input
switch
(SW)
Output
relay
(11-12, 8-9)
Output
relay
(10 -11, 7- 8)
Channel
status LED
(yellow)
Line fault
LED
(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
Figure 10.2: Test circuit for MTL5018AC
Table 10.1