ORTEC 99X-1 User manual

Model 99X-I
RS-2324 Interface
Instruction Sheet
This SerialCommunications Interfaceconformsto
the EIA RS-232-C Standardand containsallthe
circuitry neededto communicatewith most ASCII
terminals andwith mostcomputersequippedwith
a SerialCommunicationsPort. The connectionis
made with a standard25-pin, male
"D" connector
mounteddirectly to the interface printedwiring
board
(PWB). The connector is accessible through
a slot inthe rear panelof the module. This
connector iswired as a
DTE (dataterminal
equipment) device as defined inthe RS-232-C
standard. The 20-mA current signals are also
includedon this connector.
The signalconnections are shown inTable
1. The
signalnames inuppercase are the 20-mA current
connections and the RS-232-Csignal names are
shown in lower case.
Whenthis interfaceis connected to another
DTE
devicesuch as a computeror terminal, a null
modemcable must be used to matchthe proper
signalsbetweenthe two devices. Thesecablesare
available at most computer equipment suppliers or
directly from ORTEC. The connections of the null
modemcable are given inTable 2.
The serial option
is afull-duplex, asynchronous
communicationsinterfacewith aselectablebaud
ratefrom
50 to 19,200. The baudrateselection is
madevia a 4-position DIP switch locatedon the
PWB (Fig. 1). The baudrateselectedmust match
exactly the baudrateof the device towhich the
module isconnected. The switch settings are given
inTable
3.
Inadditionto the baud rate selection, the format of
the data bits(ASCIIcharacters) must also be set to
matchthe device to which the
994 isconnected.
To accomplishthis, an &position DIP switch
(Fig. I) isprovidedto allow the operatorto select
the numberof data bits, parity enable or disable,
odd or even parity if enabled, andeither one or
two stop bits. These must matchthe device to
which the
module is connected. Table 4 defines
these selections.
Table 1. RS-2324 Connections.
Pin 1 ?in
No. Signal I NO. Signal
1 protective ground
2 transmit data
3 receive data
4 request to send
5 clear to send
6 data set ready
7 signal ground
8
9
10
11
12
13
14
15
16
17 POSITIVETRANSMIT
I8
t9
20 dala lerminal ready
21
22
23
POSITIVE RECEIVE
24 NEGATIVETRANSMIT
25 NEGATIVE RECEIVE
Table 2. Null Modem Cable Connections
Pin Pin
Computer No. No. 99X-1
ProtectiveGround
Signal gmnd
Transmit data
Receive data
Request to send .
Clear to send
Data set ready
Data lemilnal ready
Protee Ground
Signal ground
Receive data
Transmit data
Clear b send
Requesl to send
Data twndnai ready
Data set ready
Table 3. Baud Rate Selection
BaudRate
84 53 52 51
50 On
On Off
On
75 On
On
Off Off
110 OR Off
OM Off
134.5 On
Off On
On
150 Off
Off off
On
200 On Off On Off
300 Off Off On Off
600 On Off
Off On
1200 Off On
Off Off
1800 Off On Off On
2400 On Off Off Off
4800 Ofl
On On
Off
9600 Mi On
On On
19,200
On On On On
19,200
On
On
On Off

20 ml CURRENT LOOP
PASSIVL
SELECTION
ACTWE
W3
mu.
.W"E
.a.
Fig. I. Changing Jumpers on the 99X-I RS-232-C InterfaceBoard.
ON
7 DATA BITS
DISAbLE PAIIIPI
r*nm ODD
* STOP MI
MIA
ONE CVCLE
COUNTER ONLY
WOAMAL
Table 4. Data Format
20-mA CURRENT COOP OUTPUT
Switch
Position Off On
1 8 Data Bits 7 DataBits
2 Enable Parity Disable Parity
3 Even Parity Odd Parity
4 2Stop Bits -I Stop Bit
5
6 RecycleMode OnsCycteMode
7 Counterrrimer Counter Only
8 PRINT ONLY NORMAL
The 99X-1 optionis shippedfrom the factory with
the following settings:
I .Characterlengthset to 8 bits.
2. Paritycheck and generationdisabled.
3. Parity selectionset to even.
4. Stopbitselectionset for 1.
5. Baudrate set for 9600.
6. One-cycle modeselected.
7. Counterflimer selected.
8. NORMAL.
The 20-mA currentloop operates inexactly the
sameway as the
RS-232-C. All switchselections
apply equally to the
20-mA current loop
communications. The major differenceinthe two
modes isthe electrical characteristicsof the
signals.
The RS-232-C usesa change involtage to
transmit and receivedata, and the
20-mA current
loopuses
a change in current to transmit and
receivedata.
The current loop is opticallycoupled
to the module
and can be made to beeitheractive
(currentfor the loop suppliedbythe module)or
passive(currentfor the loopsupplied by the
connecteddevice)
by changing a set of jumpers on
the interfaceboard
(Fig. 1). The transmit and
receiveloops can beindividuallyselected
to be
active or passive. The module is factory-set at
shipmentwith both
the transmit and receiveloops
set for active. The transmit and receive signals are
includedinthe RS-232-C connector. A special
cable is neededwhen usingthe
20-mA current
loopto connect the module to a computer
or
terminal. Order cable Model 91 8 Cable Assy, 20
mA (C19) from ORTEC.

USING THE 99X-1 WITH A PRINTER INSTALLATIONINSTRUCTlONS
By placingthe PRINTONLY-NORMAL (52-8)to
the PRINTONLY position, the 99X-1 Interfacewill
drive a printerwith an RS-232-C interfacedirectly.
This allows the module to generatea hard-copy of
the data collected without the needfor commands
from a computeror keyboard.When the interface
isinstalledina Counterrrimerand the moduleis
startedwith the Count control, each time the
presetvalue is reached the data isautomatically
transferred to a printer. Ifthe Recycle mode is
selected (S2-6 Off), the Counter data iscleared
anda new cycle is startedimmediately. Ifthe One
Cycle mode issejected
(S2-6 On), the counterwill
haltuntila resetisgenerated either by the-front-
panelResetswitchor by the Dwelltime expiring, at
which time a newcounting cycle will begin.
When the interfaceis installedina CounterOnly
module, a countingcycle isstarted by the front-
panetCount control. When the counting cycle is
stopped either bypressingthe Stop controlor by
bringingthe Master Enable(or Gate)inputlow, the
data which hasaccumulatedinthe counter will
be
transferred to the printer. If the Recyclemode is
selected, the counterwill beclearedand
a new
data collection cycle startedas soon as the
counterisenabledeither by the Count controlif
the countingwas terminated bythe Stop switch, or
bythe Master Enable (or Gate) going highif the
countingwas stopped
by thissignal. Ifthe One
Cycle mode isselected, the counterwilt continue
countingfrom the pointof interruptionwithout
beingreset when reenabledto count.
When power isapplied to the module, the Model
Number of the Moduleand the firmware version
will be printed.When any of the modeswitches
are changed, the modulemust be powered
up
againbefore the changesare recognized.
The Model
99X-1 RS-232-C Interfacecan be
installedinthe ORTEC Models 994, 995, 996, and
997. To installthe RS-232-C interface,follow the
steps listed below:
I. Removethe leftside platefrom the module. If
the optional power supply is notalready
installed,skip to step
5.
2. Removethe right side panel.
3. Remove the two screws holdingthe optional
powersupply to the bottom rightmodulebar.
4. Remove the two screws on the top of the power
supply chassiswhich secure it to the bracket
mountedon the bottomleftmodule bar, and
movethe power supply chassisout of the
module.
5. On the interfaceboard, set the switches to the
desired positionsusingTables
3 and 4 to match
the device to which itwill be connected.
6. Ifinstalling into Models 996 or 997, replacethe
two
518" metalstandoffs on the circuit board of
the modulewith two 112" standoffsincludedin
the mounting kitfor 99X-1 interfaceboard.
7. Installthe interfaceboard intothe module,
slidingthe RS-232-C connector through the slot
in the rear panelof the module first and align
the40-pin connector on the back of the board
with the pinsprovidedon the counter board.
Use care to ensure propermatch-upof
connector and pins.
8. Installthe two mountingscrews intothe
standoffs providedon the counter board.
9. Reinstallthe power supply chassisifone is
present.
10.Replace side panelsand installationis
complete.
6553808 0202
Printed in U.S.A.
ORTEC
800-257 -9750 www.ortec-online.com
infoeortec-an!ine.com Fax [phone]
801 South Illinois Avo.. Oak Ridqe. TN 37831-0895 U.S.A. 18651 4e2441l
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