Emerson I-0168 User Manual
Bettis Canada Ltd.
4112 91A Street
Edmonton, Alberta, Canada T6E 5V2
Tel: (403) 450-3600
Fax: (403) 450-1400
MULTIPORT ELECTRONIC CONTROLLER
CUSTOMER:
P.O.#:
W.O.#:
TAG:
DATE:
APPLIES TO OPERATOR MODEL:
Edmonton
SERVICE MANUAL No. I-0168
DESCRIPTION DWG.NO. PAGE
I INTRODUCTION ......................................................... 2
II ACTUATOR ASSEMBLY................................................... 2
TYPICAL ELECTRICAL ASSEMBLY DRAWING.................. IB0165 ........ 4
III MULTIPORT ELECTRONIC CONTROLLER .................................... 5
ASSEMBLY DRAWING .................................... CB0175 ....... 15
TYPICAL WIRING DIAGRAM, DC SUPPLY ..................... SB0708-X00 .... 16
TYPICAL WIRING DIAGRAM, AC SUPPLY ..................... SB0708-X01 .... 17
TYPICAL BOARD DIAGRAM................................. APB1359-## .... 18
IV TROUBLESHOOTING..................................................... 19
V NOTES ................................................................ 20
I-0168--.WPD
REV 2: DEC-15-97
I INTRODUCTION
The Multiport Electronic Controller (MEC) replaces the SW28 Switchpak, for the Multiport
Selector Valve. This service manual is intended to supersede the SW28 Switchpak information
in Multiport Selector Valve service manuals.
II ACTUATOR ASSEMBLY
A. MULTIPORT ELECTRONIC CONTROLLER (MEC): SWITCHPAK PEDESTAL,
CONNECTOR, SWITCHPAK MODEL SW20N-AM AND ELECTRICAL CONDUIT
(OPTIONAL LOCAL CONTROL STATION AND DIGITAL DISPLAY)
NOTE : For MEC, see the typical actuator assembly drawing on page 4.
1. Install Switchpak pedestal (449) in place and install the six studs (452), washers (453)
and nuts (454).
2. Start threading the setscrew in the Switchpak connector (457) and place on the speed
reducer shaft. Set coupling (455) on top of Switchpak connector.
3. Install adapter (459) on the Switchpak (300) shaft with setscrew (465). Set the
Switchpak SW20N-M in place onto the coupling (455) and install the four bolts (458),
flatwashers (461), and lockwashers (462).
4. Install electrical conduit for the MEC as follows:
a) Standard connections for Switchpak SW20N-AM and motor:
Off the Switchpak, assemble 1 NPT x 3/4 NPT reducer (322), 3/4 NPT close nipple
(310), seal enclosure (315), seal cover (314), 3/4 NPT x 2.75 long nipple (313), field
power supply connection enclosure (334), 3/4 NPT x 2.75 long nipple (313), 3/4 NPT
capped elbow (321), 3/4 NPT x 3.50 long nipple (312), and the 3/4 NPT union (320)
to the motor terminal box. Install 3/4 NPT plugs for the enclosures and 1/2 NPT plug
for the seal cover.
b) Optional connections for local control station:
Off the Switchpak pedestal, assemble the local control station (350), STEP/JOG
pushbutton (356), REMOTE/JOG/STEP 3-position switch (357), 3/4 NPT x 3 long
nipple (318), 3/4 NPT capped elbow (321), 3/4 NPT x 2.50 long nipple (317). Thread
into the seal enclosure (315) until the back of the control station is flush with the
Switchpak pedestal. Loosely install bolt (351), flatwashers (353), lockwashers (354),
and nut (352). Use spacer (358) if required. Install 3/4 NPT plug for the control
station.
c) Optional connections for digital display:
Off the Switchpak pedestal, loosely install the display bracket (506) with bolts (516),
lockwashers (520), flatwashers (522), and nuts (518). Connect digital display
enclosure (500) to seal enclosure (315) with 3/4 NPT x 2 long nipple. Loosely attach
display enclosure to bracket with bolts (508), lockwashers (512), flatwashers (514)
and nuts (510). Install positional display board assembly (502) to enclosure (500)
with standoff (504) and screws (505).
2
ACTUATOR ASSEMBLY continued . . .
5. See the typical drawing for Switchpak SW20N assembly on page 15, and the typical
wiring diagrams on page 16 for DC supply and page 17 for AC supply. Install all wiring
according to the electrical diagram and local regulations.
6. Check shaft alignment of the electronic controller to speed reducer by rotating both
shafts independently, without binding occurring in the connector. Adjust if necessary.
7. With the Switchpak, the optional local control station and/or the digital display aligned on
the Switchpak pedestal, tighten all mounting bolts, nuts and setscrews.
8. Pour seal enclosure (315), or tag.
9. Tag power supply connection wires in enclosure (334), install plug (303) and tag as
power supply field connection point.
10. Install entry plugs (301, 302, 309) in the Switchpak SW20N enclosure (300) and tag as
communication field connection point.
3
III MULTIPORT ELECTRONIC CONTROLLER
A. INTRODUCTION
The Bettis Multiport Electronic Controller (MEC) consists of a motor, Switchpak model
SW20N, optional local control station and position display. It is a microcontroller based
system developed to control and monitor status of the Multiport Selector Valve. It provides
improved accuracy, eliminates mechanical adjustment of cams, and allows digital
communication with one or more Multiport Valves over a single cable.
B. TECHNICAL DESCRIPTION
The MEC uses an optical absolute encoder to read the position of the valve into a 8 bit
microcontroller. The encoder resolution is 1024 readable positions within the 360b rotation
of the valve which results in the plug position being monitored to 0.35b accuracy. The
microcontroller controls the motor on/off relay, and the optional digital display, with input
from an external host device (computer, RTU or PLC) via a digital communication
connection. The inputs from the optional local control station (switch position and
pushbutton sense) are also connected to the microcontroller. The microcontroller utilizes a
memory chip (EEPROM) which retains the home port setting, and ASCII text message for
the valve, even during power failure.
C. ELECTRONIC CONTROLLER SPECIFICATIONS
INPUT VOLTAGE OPTIONS: 1. 120 VAC (50 - 60 Hz)
2. 24 VDC
BOARD INPUT VOLTAGE: 8 - 30 VDC OR 9 - 20 VAC
BOARD INPUT CURRENT: 0.5 AMP MAXIMUM
BOARD (MP-08): CONFORMAL COATED
LIGHTING PROTECTED
FUSE: 1 AMP TIME DELAY
TEMPERATURE RATING: -40bC TO +70bC
-40bC TO +85bC OPTIONALLY
SHOCK AND VIBRATION: 10 G's
HUMIDITY: 98% WITHOUT CONDENSATION
PROTOCOLS: 1. ASCII BASED
2. MODBUS RTU
USES SOLID STATE AC RELAY AND
TRANSFORMER
USES SOLID STATE DC RELAY AND
TRANSFORMER IF REQUIRED
CPU CHIP LABELLED "STD"
CPU CHIP LABELLED "MODBUS"
5
MULTIPORT ELECTRONIC CONTROLLER continued...
D. COMMUNICATIONS
1. ASCII BASED PROTOCOL/RS-232 CONNECTION
The standard communications protocol for the MEC uses a simple ASCII format which
connects the host device (computer, RTU or PLC) through jumper selectable
connection. Refer to board drawing on page 18 for the jumper location, jumper ‘A’ for
RS-232.
The external host device sends commands through a RS-232 cable to the electronic
controller at 1200 baud with 8 bits, no parity and one stop bit. The following is a list of
commands and responses. The CPU chip is labelled "STD".
NOTE: In the following table the '<cr>' is the ASCII character #13 (0x0d).
?<cr> Request status
apo<cr> Response where:
a = 'R' for REMOTE selector setting, or
'J' for JOG selector setting, or
'S' for STEP selector setting
p = position '1' to '8'
o = 'O' for 'on' position, or
'F' for 'off' position
!p<cr> Go to position where:
p = position '1' to '8'
a<cr> Response where:
a = 'R' for REMOTE selector setting, or
'J' for JOG selector setting, or
'S' for STEP selector setting
$pt<cr> Write valve position message where:
t<cr> p = position '1' to '8'
t = text message up to 16 characters
#<cr> Request status using 'text' response
t<cr> Response where:
t = text message for position of valve
@<cr> Request list of disabled positions
dddddddd<cr> Response where:
d = number of active position '1' to '8'
(if a position is disabled, a '-' will be in that
*h<cr> Set the Home position
a<cr> Response where:
a = 'R' for REMOTE selector setting, or
'J' for JOG selector setting, or
'S' for STEP selector setting
Optional software is available for personal computers in DOS, Windows 3.11, or
Windows 95 versions.
6
Loading...