INM 5500 Rev 11
27
6 .1 .7
MTL5514(-T)/MTL5514D - Switch/Proximity detector interface
Single channel, with line-fault detection and phase reversal
The MTL5514(-T) enables a safe-area load to be controlled, through a relay, by a proximity
detector or switch located in a hazardous area. Line faults are signalled through a separate relay
and indicated on the top of the module. The MTL5514D provides signal duplication, enabling
two safe-area loads to be controlled by a single device in a hazardous area. Both relay outputs
reflect the input signal instead of one showing the line fault condition as in the MTL5514.
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 changeover relay contacts.
See page 19 for LFD and PR switch details.
Channel 1 only
switch settings apply.
For switch sensor inputs, with LFD selected, make sure resistors (22kΩ and 680Ω) are fitted.
Note
: For reliable, long-term operation the load on the output switching relays should be not less
than 50mW, e.g. 10mA at 5V DC.
Terminal
Function
MTL5514 (-T)
MTL5514D
1
Input –ve (Ch 1)
2
Input +ve (Ch 1)
7
LFD Output contact N.C.
Output 2 contact N.C.
8
LFD Output common
Output 2 common
9
LFD Output contact N.O.
Output 2 contact N.O.
10
Output contact N.C.
Output 1 contact N.C.
11
Output common
Output 1 common
12
Output contact N.O.
Output 1 contact N.O.
13
Supply –ve
14
ve
Figure 6 .7:
Top label
for MTL5514 (-T)
& MTL5514D
Hazardous area
Safe area
Vs–
Vs+
20 to 35V dc
22k
Ω
680
Ω
+
–
O/P
LFD
Switch-type sensors
require resistors
if LFD is selected
6
5
4
3
2
1
7
8
9
10
11
12
13
14
LFD
O/P1
O/P2
7
8
9
10
11
12
