Applications Involving Zone 2 And/Or Zone 22 Hazardous Areas - Eaton Crouse-Hinds MTL5500 Series Instruction Manual

8 .5 .2
Make the safe and hazardous-area connections shown in figure 10.2 and, substituting appropriate
resistors at Rtest, carry out the following checks.
R
test
Open-circuit
220Ω
10Ω
Hazardous Area
Test circuit for MTL5553
Top Label, MTL5553
66
Testing MTL5553 - Isolator/power supply for 31 .25kbits/s fieldbuses
Voltage across terminals 2 and 1 (V
17 .8 < V < 19V
1
11.5V < V < 13.5V
1
V < 5V
1
Terminator
T
6
5
4
3
2
+
V R
1
1 test
-
1)
Safe Area
7
Link 7- 8 for Terminator
8
-ve
9
+ve
Host
10
(31.25kbit/s)
11
-ve
12
13
Vs+
14
Vs-
20-35V dc
2.6W Max
INM 5500 Rev 11