Flowserve 10 ACCESS I 39 Actuators with DeviceNet Interface - Manual

Worcester Controls
DESCRIPTION
Worcester/McCANNA ACCESS I Series 39 actuators are pneumatic
quarter-turn valve actuators with solenoid and limit switches integral
to the actuator end cap. The design utilizes a double-rack, single-
pinion concept, with each rack integrally cast to a piston. Both pistons
are supported and centered by large, stainless steel guide rods. In
double-acting units, both pistons are pressurized on both strokes of
the actuator. Ambient temperature range of ACCESS unit is 0°F
minimum to 160°F maximum.
Standard units feature an extended top shaft for manual override
capabilities and a completely modular design which allows simple
attachment of a variety of accessories. The units feature a control
block (with spool valve) which properly directs supply air to the
actuator. The control block provides independently adjustable speed
control for both opening and closing strokes of the actuator on
double-acting units, and for the closing stroke on spring-return units
(standard mounting configuration).
The DeviceNet Interface feature of this equipment permits simple
DeviceNet bus connection and communication as either a digital stand
alone device on a DeviceNet network or as an additional device to the
higher level digital protocol networks via the appropriate “gateway.”
Solenoid power, actuator opening, actuator closing and electronic
position indication are all accomplished via the DeviceNet bus. Integral
Light Emitting Diodes (LEDs) display the status of inputs and outputs.
The DeviceNet Board has two Outputs and three Inputs:
Each output is used to control a 3 watt 24 VDC solenoid. When
the output is set to 1 or ON, the solenoid will be energized. When
the output is set to 0 or OFF, the solenoid will be de-energized.
Each input is used to monitor either a mechanical switch or an
AC/DC two-wire NAMUR proximity sensor.
The DeviceNet circuit board has six LEDs. (See Board Layout.)
a. Two LEDs for DeviceNet MNS bus activity as required by the
ODVA Spec. (green/red) D1 and D2
b. Red LED to monitor CW limit switch D3
c. Green LED to monitor CCW limit switch D5
d. Yellow LED to monitor coil power D4
e. Orange LED to monitor solenoid coil continuity D6
The solenoids are powered from the 24 VDC available in the
DeviceNet cable. No additional power is required.
The ACCESS/DeviceNet Circuit Board meets the requirements of the
ODVA (Open DeviceNet Vendors Association) Specification. It is a
Group 2 slave device which operates as a slave device on the DeviceNet
network. It supports Explicit, Polled, Change-of-State, and Cyclic I/O
Messages of the predefined master/slave connection set. It does not
support the Explicit Unconnected Message Manager (UCMM).
The ACCESS DevicNet Circuit Board has one byte of output
(consumed) data and eleven bytes of input (produced) data. In the
output byte, bits 0 through 4 are not used, bit 5 is used to control
solenoid one, bit 6 is used to control solenoid 2 (not used in this
application), and bit 7 is used to reset the maintenance counter. Of the
input bytes, byte 1 is used to monitor the switch and solenoid status
of the unit with bit 0 used to monitor switch 1 (CCW position), bit 1 is
used to monitor switch 2 (CW position), bit 2 is used to monitor
switch 3 (not used in this application), bit 3 is used to monitor
solenoid 1, and bit 4 is used to monitor solenoid 2 (not used in this
application). Bits 5 through 7 are not used. Of the remaining bytes,
bytes 2–5 make up the Maintenance Counter, bytes 6–9 make up the
Cumulative Counter, byte 10 contains the opening time in seconds,
and byte 11 contains the closing time in seconds.
For connections to the ACCESS/DeviceNet Circuit Board, see Wiring
Diagrams in Section B.4.
The customer field connections to the circuit board take place on
terminal block P3 as follows:
Terminal 1 - Bus negative from 24 VDC supply
(Next to the P3 label)
Terminal 2 - CanL signal
Terminal 3 - Bus Shield
Terminal 4 - CanH signal
Terminal 5 - Bus positive from 24 VDC supply
The switch/sensor connections are made to the terminal block labeled
as P2. Terminal 1 is located next to the P2 label. The
switches/sensors are wired to the terminals such that terminals 1 and
2 are for SW2, and terminals 3 and 4 are for SW1. Positive 24 VDC is
provided on terminals 1 and 3 to the switches and the switch returns
connect to terminals 2 and 4 respectively.
WCAIM2019
(Part 13428)
10, 15, 20 ACCESS I
39 Actuators with DeviceNet Interface
Installation, Operation and Maintenance Instructions