E7014
24
ESTRO-A CONNECTIONS
POS
DESCRIPTION
POS
DESCRIPTION
a
ECS serial communication
e
Digital input
b
Power
f
Detection flame with UV phototube
c
Safety stop
g
Detection flame with rod
d
Lockout alarm output
h
Detection flame with unirod
Connector terminals
POS
DESCRIPTION
POS
DESCRIPTION
L
Power supply phase
6
Air valve neutral
N
Power supply neutral
7
Ignition transformer phase
1
Lockout signal output (phase)
8
Ignition transformer neutral
2
Digital input (phase)
9
Detection rod, signal from transformer
(unirod) or UV phototube negative terminal
3
1st stage gas valve phase
10
Protection ground, UV phototube positive
terminal and burner case
4
1st stage gas valve neutral
+
Positive input for serial communication
5
Air valve phase
-
Negative input for serial communication
