Flowserve Valtek StarPac 1 Intelligent Control Systems - Manual (Page 9)

41-9 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Figure 10: Local RS-485 Connector
3. Perform the desired actions as described above to
reset or initialize the system.
CAUTION: Properly ground yourself before
handling the StarPac electronics; otherwise the
sensitive components may be damaged.
4. Replace the StarPac electronic housing cover.
Reading Local Display
The local display on StarPac models SPJS, SPJD or NT
displays two lines of information about the system and
the process. The top line of the display has two func-
tions: the left side is a description of the variable
displayed on the second line. The right side of the top
line has information on the current mode of operation
MAN = manual, AUT= automatic, and CAL = calibrate
(or out of service), OVR = over range, TRP = tripped.
The second line of the local display shows process or
valve information as configured using the StarTalk II
software.
An 'A' flashing on the right side of the display indicates
there currently is an alarm condition. An 'E' flashing
indicates an error condition. Generally at this point,
these problems are caused by one or more of the
following three conditions:
1. Air supply is not turned on to system
2. The 4 - 20 mA signal is not turned on, or is not being
received by system.
3. The system has just been initialized or is operating
in the calibration mode. The alarm signal will cease
when the system is reconfigured or set to the proper
mode.
For more information, refer to StarPac manual section
on alarms and errors.
Adjusting Display View
The StarPac alphanumeric local display has an adjust-
ment to allow some changes to the display for optimum
visibility.
WARNING: Never remove the StarPac cover in
explosive atmospheres; otherwise potential injury
may result to personnel and equipment.
CAUTION: Properly ground yourself before
handling the StarPac electronics; otherwise the
sensitive components may be damaged.
This adjustment is made by removing the plastic shroud
and adjusting the blue trim potentiometer until the
display is visible. Replace the plastic shroud, secure in
place and replace the large StarPac electronic housing
when done.
Local RS-485 Connector
A local RS-485 connector is located on the user termi-
nal block (Figure 9) to allow ease of direct field interfac-
ing to the StarPac system. This connection is a parallel
connection to the RS-485 port terminals (11, 18) on the
user interface terminal block. On StarPac models
SPJD and NT, this is connected only to Port B.
NOTE: The StarPac can only communicate to one
master device on a communication port. When using
the local interface, one of the RS-485 screw interface
wires may need to be disconnected to prevent a conflict
in communications.
A plug connector is available from the factory that will
allow an interface cable to be established. (Request
Part No. 83213.FOT from Flowserve Advanced Prod-
uct Development Group.) The connector’s crimp termi-
nals are made for 22-26 AWG wire. Note the correct
polarity of the terminals as shown in Figure 9.
Table V: Hardware Specifications
Power Supply 24 VDC
±
10%, 300 mA
maximum
RS-485 length Up to 4000 feet (22-26 AWG)
4 –20 mA input 232 ohms, 500 V isolation
4 –20 mA up to 750 ohm load, 500 V
output drive isolation
Output contact 1 amp at 110 VAC (for Division
rating II areas the ratings are reduced
to 24VDC resistive load: Groups
A & B- 230 mA; Group C- 590
mA; Group D- 800 mA)
Discrete inputs 26.6 kohm, 75 V DC or AC
(peak-peak) rising, 22 V DC or
AC (peak-peak) falling with
180 V maximum.