E7014
25
ESTRO-B 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
A
Lockout signal output (phase)
6
2nd stage gas valve neutral
B
Digital input (phase)
7
Ignition transformer phase
1
Power supply phase
8
Ignition transformer neutral
2
Power supply neutral
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
2nd stage gas valve phase
-
Negative input for serial communication
