Honeywell HercuLine 10260S Installation, Operation And Maintenance Manual page 14

1. Introduction - Features
10260S Smart Electronics
Enhanced Electronics Printed Wiring Assembly (Main PWA)
An enhanced electronics printed wiring assembly (PWA) provides digital control to the 10260S actuator.
The Main PWA is the central interface which features a microprocessor controlled CPU with associated
flash PROM and RAM. Other features of the main PWA include an optically isolated 12-bit A/D converter
for the 4 to 20 mA input signal, an isolated analog output for 4 to 20 mA output or slidewire emulation
voltage, and an RS485 communications channel that supports Modbus RTU protocol.
HART Communications is available as an option.
Additionally, the main PWA interfaces with:
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The local display and keypad electronics
•
The local AUTO - MANUAL switch
•
Digital input circuit
•
Relay output PWAs
•
Smart communications PWAs
Power Distribution PWA
The power distribution PWA provides power distribution of the 120/240 AC input to all actuator
components. Solid-state switches on the PWA provide control for the motor drive. The power distribution
PWA is directly connected to the enhanced electronics PWA in the actuator enclosure.
Relay PWA
Electromechanical relay circuit assemblies are available as an option. The 10260S actuator can be
equipped with up to two relay boards, each containing two SPDT relay output circuits (for a total of four).
Relay contacts can be programmed (set up) to indicate various operating conditions within the actuator,
such as position range limits, deviation from input, high or low temperature limits, or input out of range.
See Relays Set Up Group (page 39) for additional information.
Display and Keypad Interface
An alphanumeric display and keypad provides the HMI for local monitoring, set up and control of the
actuator. The interface consists of a four character and six character alphanumeric display, LED status
indicators and keys to access all operating parameter settings and view actuator-operating status.
Auto - Manual Switch
The Auto-Manual electric handswitch with auxiliary contacts indicating an "Out-of-Auto" position is
available for local electric control. The switch provides manual control of the motor drive for actuator set
up and calibration.
Self-Locking/Releasing Gear Train
The worm gear output combination is self-locking and self-releasing and maintains position upon loss of
power. It is designed to hold greater than two times the rated output torque in a back-driving condition.
This design provides superior reliability without the maintenance associated with other self-locking and
brake mechanisms.
4 10260S HercuLine® Actuator Installation, Operation and Maintenance Manual Revision 5
7/07