20
INM4500-2
Mar 2009
6.1.7 MTL4516C - Switch/Proximity detector interface
Two channel with line fault detection and phase reversal - changeover contacts
The MTL4516C contains two changeover relays, which enable two safe-area loads to be controlled
by switches or proximity detectors located in a hazardous-area. When selected, the line-fault-detect
(LFD) facility detects open or short circuit conditions in the fi eld wiring and also indicates this on the
top of the module.
Line Fault Detect
and
Phase Reversal
for the channel are selected by DIL
switches on the side of the module and output is provided by the changeover relay contacts.
See Section 5.1.1 on page 8 for LFD and PR switch details.
Channel 1 & 2
switch settings
apply..
For switch sensor inputs, with LFD selected, make sure resistors (22k
Ω
and 680
Ω
) are fi tted.
Note
: Signal plug HAZ1-3 is required for access to the earth leakage detector function.
Figure 6.7
LED indicators
for MTL4516C
Hazardous area
Safe area
1 2 3 4 5 6
7 8 9 10 1112
13 14
Vs+
Vs
2035V dc
Ch 1
Ch 1
Ch 2
Ch 2
22k
W
680
W
22k
W
680
W
To MTL earth leakage detector
+
+
Switch-type sensors
require resistors
if LFD is selected
Terminal
Function
1
Input –ve (Ch 1)
2
Input +ve (Ch 1)
3
To earth leakage detector
4
Input –ve (Ch 2)
5
Input +ve (Ch 2)
6
To earth leakage detector
7
Normally-open contact (Ch 1)
8
Common (Ch 1)
9
Normally-closed contact (Ch 1)
10
Normally-open contact (Ch 2)
11
Common
(Ch
2)
12
Normally-closed contact (Ch 2)
13
Supply
–ve
14
Supply
+ve
PWR
STS
LFD
STS
LFD
MTL4516C
CH2
CH1
Содержание MTL4500 Series
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