AXAIM025-00 (AUTO-87) 7/01 Page 1 of 4
©2001, Flowserve Corporation, Provo, UT
Flowserve Corporation 765 South 100 East Phone: 801 373 3028
Flow Control Division Provo, Utah 84606 Facsimile: 801 489 2228
Automax Valve Automation Systems
Installation, Operation and Maintenance Instructions
Introduction
Flowserve’s BUSwitch™ uses the AS-I Bus
communication protocol to operate pneumatic valve
actuators and monitor/report their position. The AS-I
card may be provided in Flowserve’s Aviator
enclosure with integrated solenoid valve or in our
UltraSwitch™ enclosures for use with external
solenoid valves.
Principles of Operation
BUSwitch™ utilizes two discrete outputs to energize
solenoid valves, which operate rotary pneumatic
actuators. For spring return and double acting
applications with a desired fail position (open or
closed). Output one (1) is used to operate a single
pilot. For applications requiring fail in last position,
both output one (1) and output two (2) are used with
a “dual coil” pilot configuration.
Actuator position is sensed with two limit switches.
BUSwitch™ communicates the state of these limits
into the master as input one (1) and input two (2)
A 2-wire cable using the AS-I (166 kb/s) protocol
provides communication and power to the AS-I
Communication Board. This card operates from
29.5 to 31.6 VDC.
Printed Circuit Board Specifications
Power requirements
XA0244
Communications Card
29.5 to 31.6 VDC
Temperature
Operational -55 °F to +185 °F
(-48 °C to +85 °C)
Storage -55 °F to +250 °F
(-48 °C to +120 °C)
AS-I Bus Information
ID Code (describes device behavior)
ID 0001 Binary
This code is specific to
Flowserve’s AS-I board and is
stored in non-volatile memory
I/O Code (describes type of I/O
implemented)
Type OUT OUT IN IN
I\D 1011 Binary
This code is also stored in non-
volatile memory.
Start-up Guide
1. Following the instructions in “Mechanical
Installation,” install the BUSwitch™ onto a
pneumatic actuator and turn supply air on.
2. Following the instructions in “Electrical
connections,” connect AS-I bus.
3. Bring up control software used for AS-I
implementation.
4. Turn power onto AS-I bus.
5. Using output 1 value parameter (and output 2 for
dual coil mode), stroke the valve (Discrete 0 =
de-energized; Discrete 1 = energized) and set
limit switches, referring to “Adjustment of Switch
Cams” section. Circuit board mounted LED’s
light when switches are tripped.
6.
This is the minimum configuration to operate the
actuator and read valve position
Mechanical Installation
Installation is best performed with Flowserve
NAMUR mounting kits. These kits allow direct
mounting of the BUSwitch™ shaft to the actuator
pinion without a coupler. The NAMUR mounting kits
will work with any actuator conforming to the
instructions, NAMUR standard for accessory
mounting hole locations and pinion dimensions.
Simply attach the bracket to actuator and
BUSwitch™ to the bracket with the included
fasteners. The BUSwitch™ shaft features an
integral alignment pin that engages the tapped
pinion hole. Flowserve also offers a full line of non-
NAMUR mounting kits.
Spool and Tubing Configuration
1. For external solenoid valves, refer to solenoid
valve operating instructions for piping and tubing
configuration. For integrated solenoid valve, a
four-way spool valve is provided. Plug port #2
for 3-way applications (Figure 1). Make sure the
plug is properly configured before installing
tubing.
2. Make sure all air pressure is removed before
installing tubing.
3. Attach tubing according to solenoid valve
manufacturer’s instructions. For integrated
solenoid valve configuration, refer to Figure 1 for
AS-I Bus Card for BUSwitch and UltraSwitch Enclosures
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