11 / Input / Output Connections
Note:
9-pin male connector assembly is
included (replacement part # 7154).
]
]
5-24 VDC
250mA Max
5-24 VDC
Pin Function
1.
In
2. Initiate
-
3. Output
+
4. Output
-
5.
Contact Closure
6. Chassis
Ground
7. Contact
Closure
8. Not
Used
9. Not
Used
I/O Connection
The 9-pin D connector
and internal circuitry pro-
vide external initiate and
end-of-cycle feedback
signal. The pin connec-
tions are shown below.
Input/Output Connections
1. Voltage Initiate Circuit
The controller may be initiated with
a 5 to 24 VDC signal across pins
1 and 2. The signal can be momen-
tary (no less than 0.02 seconds) or
maintained. A new cycle will begin
once power is removed and then
applied again.
2. End-of-Cycle Feedback Circuit
Upon completion of a dispense
cycle, an open collector circuit
closes and remains closed until the
next dispense cycle. This circuit
can be utilized to signal back to a
host computer, start another device
in sequence or other operations
that need to be tied into comple-
tion of the dispense cycle.
Upon closure, power from an exter-
nal 5 to 24 VDC source is allowed
to pass through the circuit to oper-
ate a load. The load illustrated is a
relay, but this could be any device
that will operate within the 5 to 24
volt range. Power consumption of
the load must not exceed 250mA.
3. Mechanical Contact Initiate
The controller can be initiated via
the closure of mechanical con-
tacts such as a relay or switch
using pins 5 and 7. Closure of
the contacts can be momentary
(no less than 0.02 seconds) or
maintained. A new cycle will
begin once the contacts are
opened and then closed again
.
Note:
For applications using more than
one 7040, see page 15 for connection
instructions.
6
7
8
9
1
2
3
4
5