- 24 - 057-001 720 Operating Instructions Issue 3.1 20/12/2005 AM
11 SOLID STATE OUTPUTS
DSE’s utilisation of Solid State Outputs gives many advantages, the main points being:
No Moving Parts
Fully Overload / Short Circuit Protected.
Smaller dimensions hence lighter, thinner and cheaper than conventional relays.
Less power required making them far more reliable.
This type of output is normally used with an automotive or plug in relay.
Battery negative (-)
Solid state output from DSE module
eg. Terminal 4 of 720 - FUEL
Fuel Solenoid
(+ terminal)
* Observe polarity when using
relays fitted with integral diodes!
*
AD
B
C
Battery positive (+)
A
B
C
D
Solid State Output
from DSE Module Pin
Automotive
relay Pin
8 Pin Plugin relay Function
4 86 7 Fuel Output
85 2 To Negative supply
30 1 To Positive supply via fuse
87 3 To Fuel Solenoid
Example of relay pins connected to DSE solid state output to drive a fuel solenoid.
NOTE:- The Close Mains Relay should be NORMALLY CLOSED when de-energised for
fail safe operation. Should the DC supply fail the mains will always be available. The output
from the DSE solid state output when energised will OPEN the relay therefore isolating the
mains supply.
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