Table of Contents
Advertisement
6 .1 .5
Single channel, with line-fault detection
The MTL5511 contains a changeover relay, which enables a safe-area load to be controlled by a
switch or proximity detector located in a hazardous-area. When selected, the line-fault detect
(LFD) facility detects open or short circuit conditions in the field 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 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 relay should be not less
than 50mW, e.g. 10mA at 5V DC.
LFD
STS
MTL5511
PWR
Figure 6 .5:
Top label
for MTL5511
25
MTL5511 - Switch/Proximity detector interface
Hazardous area
680Ω
22kΩ
Switch-type sensors
require resistors
if LFD is selected
Terminal
Function
1
Input –ve
2
Input +ve
10
Output normally-closed contact
11
Output common
12
Output normally-open contact
13
Supply –ve
14
Supply +ve
Safe area
6
7
5
8
4
9
10
3
+
11
2
12
1
–
13
14
Output
Vs–
Vs+
20 to 35V dc
INM 5500 Rev 11
Hide quick links:
Advertisement
Table of Contents
