Model 2499-DIGIO
Packing List
Overview
The Model 2499-DIGIO (shown in Figure 1) is a digital I/O expansion option for Keithle y SourceMeters. W ith the Model 2499
connected to the SourceMeter, the Digital I/O Port is expanded to pro vide 16-bit operation (16 output lines). This allo ws you to
utilize more component bins for limit testing. When using a category pulse component handler, up to 16 bins can be used in
your test system. When using a category register component handler, you can use as many bins as you need.
The digital I/O port of the SourceMeter can also be used to control other external devices.
NOTE This packing list provides supplemental operating information. Refer to the SourceMeter User’s
manual for details on the digital I/O and limit testing.
Figure 1
Model 2499-DIGIO
WARNING The Model 2499-DIGIO is not intended for use in circuits carrying voltages in excess
KEITHLEY
MODEL 2499-DIGIO
42V MAX
100mA PER PIN MAX
of 30V RMS, 42.4V peak, or 60VDC.
Connections
The Model 2499 has a female DB-9 connector on one end and a standard female DB-37 connector on the other end. The end
with the DB-9 connector mates directly to the digital I/O port on the rear panel of the SourceMeter. Make sure the SourceMeter
is turned off before connecting the Model 2499.
Use a cable terminated with a standard male DB-37 connector to connect your external circuit(s) to the digital I/O port. Pin
identification for the DB-37 connector of the Model 2499 is provided in Figure 2. Note that EOT, /EO T, BUSY, and /BUSY use
a dedicated line (pin 34) when the Model 2499 is used.
PA-651 Rev. A / 7-99
Figure 2
DB-37 pinout
Bank A:
Output 1 = Pin 5
Output 2 = Pin 6
Output 3 = Pin 7
Output 4 = Pin 8
Output 5 = Pin 9
Output 6 = Pin 10
Output 7 = Pin 11
Output 8 = Pin 12
+5V = Pin 14
Ground = Pins 13 and 32
/Interlock = Pin 15
SOT = Pin 33
EOT, /EOT, BUSY, /BUSY = Pin 34
19
37
16-bit output patterns
1
20
Bank B:
Output 9 = Pin 24
Output 10 = Pin 25
Output 11 = Pin 26
Output 12 = Pin 27
Output 13 = Pin 28
Output 14 = Pin 29
Output 15 = Pin 30
Output 16 = Pin 31
Digital output size
In order to set a 16-bit output pattern, the 16-bit digital output size must be selected. From the front panel, the following menu
sequence selects the16-bit digital output size:
Press CONFIG > press LIMIT > select DIGOUT > select SIZE > select 16-BIT.
For remote operation, the following command selects the 16-bit digital output size:
:SOURce2:BSIZe 16
NOTE The rest of the information in this packing list assumes that the 16-bit digital output size is selected.
Output pattern formats
When using the Model 2499, the SourceMeter, you can output binary bit patterns from 0 to 1111111111111111. From the front panel,
an output bit pattern must be entered as a decimal value (0 to 65535). Table 1 shows the decimal weight of each output line. For example, if you want output lines 10 and 3 to be high (1000000100), you would set the output pattern to 516.
Table 1
Decimal weighting for output lines
Output line 16 15 14 13 12 11 10 9
Decimal weight 32768 16384 8192 4096 2048 1024 512 256
Output line
Decimal weight 1286432168421
87654321
For remote operation, an output bit pattern can be set in the decimal, binary, octal, or hexadecimal format. When sending a command to set an output bit pattern, there are two parameter types to express the value. For the decimal format, an <NRf> parameter
type is required. For any of the non-decimal formats, an <NDN> parameter type is used. Parameter v alue ranges for 16-bit operation are as follows:
<NRf> = 0 to 65535 Decimal format
<NDN> = #B0 to #B1111111111111111 Binary format
= #Q0 to #Q177777 Octal format
= #H0 to #HFFFF Hexadecimal format
When you send a query command to read the output pattern, the returned value will be in the format selected by the following
command:
:FORMat:SOURce2 <name>
where: <name> = ASCII Decimal format
= BINary Binary format
= OCTal Octal format
= HEXadecimal Hexadecimal format
Limit testing
Other than increasing the number of output bit patterns that can be set (which allows more component bins to be used), limit
test operation is not changed by the Model 2499. For front panel operation, the various output pattern menus let you set bit patterns (in the decimal format) from 0 to 65535.
For remote operation, commands to set and read output patterns are listed in Table 2.
Table 2
Commands to set and read digital output patterns
Command
:CALCulate2:LIMit[1]:COMPliance:SOURce2 <NRf> | <NDN> Limit 1 fail pattern.
:CALCulate2:LIMitX:LOWer:SOURce2 <NRf> | <NDN> Lower limit X fail pattern for grading mode.
:CALCulate2:LIMitX:UPPer:SOURce2 <NRf> | <NDN> Upper limit X fail pattern for grading mode.
:CALCulate2:LIMitX:PASS:SOURce2 <NRf> | <NDN> Limit X pass pattern for sorting mode.
:CALCulate2:CLIMits:PASS:SOURce2 <NRf> | <NDN> Composite pass pattern. Sorting mode only
:CALCulate2:CLIMits:FAIL:SOURce2 <NRf> | <NDN> Composite fail pattern for sorting mode.
:SOURce2:TTL[:LEVel][:DEFault] <NRf> | <NDN> Set digital I/O port output pattern.
:SOURce2:TTL[:LEVel][:DEFault]? Query default output pattern.
:SOURce2:TTL[:LEVel]:ACTual? Query actual output pattern.
:CALCulate2:LIMit4:SOURce2 <NRf> | <NDN> Limit 4 fail pattern
1
Description
if limits 2, 3, and 5-12 disabled.
1
2
.
<NRf> = 0 to 65535 Decimal format
<NDN> = #B0 to #B1111111111111111 Binary format
= #Q0 to #Q177777 Octal format
= #H0 to #HFFFF Hexadecimal format
1. LIMitX = LIMit2, LIMit3, LIMit5 through LIMit12.
2. LIMit 4 is only available for a 2400 series SourceMeter, and only if the contact check option is installed.
•
•
Controlling other external devices
There are two basic methods to control other external components (such as relays) using the digital I/O port of the SourceMeter:
sink operation or source operation. Section 13 of the Model 2400 Series User’s Manual describes sink and source operation for
the digital I/O port.
Digital output control
From the front panel, the output pattern (in the decimal format) can be set from 0 to 65535. Use the following menu sequence
to set the output pattern.
Press MENU, select GENERAL, select DIGOUT, set the output pattern.
For remote operation, the output pattern can be set in the decimal, binary , octal, or hexadecimal format. Use the follo wing com-
mands to set and read the output pattern:
:SOURce2:TTL[:LEVel][:DEFault] <NRf> | <NDN> Set output pattern
:SOURce2:TTL[:LEVel][:DEFault]? Query default output pattern
:SOURce2:TTL[:LEVel]:ACTual? Query actual output pattern
See “Output pattern formats” for information on value ranges for the <NRf> and <NDN> parameters, and format selection for
the query commands.
Input/output limits
CAUTION When not using the Model 2499 (3-bit/4-bit operation), the maximum sink current for an
output line is 500mA. This maximum sink current is NOT valid with the Model 2499 connected to the SourceMeter. To prevent damage to the SourceMeter, do not exceed the
maximum sink current and maximum input voltage for the I/O port.
Maximum sink current
16 output lines — The 16 output lines are divided into two banks. Bank A consists of outputs 1 through 8, and Bank B
consists of outputs 9 through 16.
– The maximum allowable total sink current for each bank is 300mA.
– The maximum allowable sink current for any indi vidual output line is 100mA.
– If, for example, each external device causes maximum sink current (100mA), you can connect six of those devices
to the output lines: three to Bank A and three to Bank B.
• EOT, /EOT, BUSY, /BUSY line — Maximum allowable sink current is 500mA.
Maximum input voltage
• The absolute maximum allowable input voltage on any line of the digital I/O is 42V.
Source current limits
• 16 Output lines - The source current for each output line is limited to approximately 2mA at TTL high levels.
• +5V line - The source current for this +5V output is limited to approximately 300mA.
Output voltage
16 output lines and EOT, /EOT, BUSY, /BUSY line — The maximum working output voltage for these lines 30V.
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