Emerson FieldQ Series Product Data Sheet page 20

Product data sheet
1.604.10 Rev. 0 Page 3 of 9
October 2017
Pneumatic control
Pneumatic control variations
The Control Module contains all the necessary pneumatic
components to control the actuator and control the incoming
and outgoing airflow. Pneumatically the modules are available
for three applications:
1. Spring return or
2. Double acting or
3. Double Acting - "Fail-in-Last-Position".
To achieve these functions, each Control Module can be
fitted with one or two pilot valves depending on the required
functionality:
1. One pilot valve is default and suitable for normal operation
of double acting or spring return actuators
2. Two pilot valves are required to achieve a "Fail-in-Last-
Position" functionality on double acting actuators.
Table 1: Pilot valve specifications
Module Voltages
QC41 24VDC (±10%)
QC42 115 VAC (±10%)
QC43 230 VAC (±10%)
Pilot valve cartridge
Pilot valve and pneumatic cartridge
FieldQ
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www.emerson.com/fieldq or from your Emerson Automation Solutions - Actuation Technologies Center:
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Power Frequency
1W NA
3VA 50/60Hz
3VA 50/60Hz
Pneumatic cartridge
Pilot valve
terminals
Cable range:
0.33 - 2.5mm 2 or
22-12AWG
One default pilot valve and wiring connections
Cable range:
0.33 - 2.5mm or
2
22-12AWG
FILP = Fail in Last Position
Wiring diagram shown, is applicable for actuators with assembly code "CW". For
actuators with assembly code "CC" (reverse acting) the "Open" and "Closed"
pilot valve connections are also reversed.
Two pilot valves and wiring connections for Fail in Last Position
FieldQ
Pilot valve 1
Pilot valve 1
Pilot valve 2