3-30
IM 701240-01E
3.12 Connecting Logic Probes
CAUTION
• Applying a voltage exceeding the value indicated below may damage the logic
probe or the SL1400. If the frequency is above 1 kHz, damage may occur even
when the voltage is below this value.
Maximum input voltage (at a frequency of 1 kHz or less)
•
702911/702912 logic probe:
35 V
•
700986 High-Speed Logic Probe: 42 V (DC+ACpeak)
•
700987 Isolated Logic Probe:
250 Vrms (except ACpeak is less than or equal to
350 V and DC is less than 250 V)
• On the 702911, 702912, or 700986 logic probe, the 8 input lines on each POD have a
common earth. In addition, the earth for the instrument and the earth for each POD are
also common. Do not connect inputs which have different common voltages, as it may
cause damage to the SL1400, logic probe, or other connected instruments.
• Each input terminal of the isolated logic probe is isolated from all other input
terminals and the isolated logic probe is isolated from the SL1400.
• Make sure to turn OFF the instrument before connecting or disconnecting the
26-pin connector from the logic input connector.
• Do not stack the isolated logic probes during use. Also, allow enough space
around the probes to prevent the temperature inside the probes from increasing.
• Do not use the 700985 logic probe by YOKOGAWA on the SL1400. The
structure of the 700985 allows it to be connected to the logic signal input
connector of the SL1400. However, because it is not electrically compatible,
connecting the 700985 may cause damage to the SL1400 or the 700985.
Logic Input Connector
Connect the 702911, 702912, 700986, or 700987 logic probe to either of the logic signal
input connectors (two connectors marked Logic A and Logic B).
About the Logic Probe
Types of Logic Probes
The following logic probes are available for connecting to the logic input connector of the SL1400.
• 702911 (1 m) and 702912 (3 m) logic probes
• 700986 High-Speed Logic Probe
• 700987 Isolated Logic Probe
*
Do not use the 700985 on the SL1400. Read the caution above.
Types of Connection Leads That Can Be Used
Use the following leads to connect to the point of measurement.
• Types of Connection Leads That Can Be Used on the 702911, 702912,
and 700986 Probes
The following two types are available.
• Connection lead (alligator clip, parts No. B9879PX)
This lead is mainly used to connect to contact circuits. The lead consists of 8 signal
lines (red) and 8 earth lines (black).
• Connection lead (IC clip, parts No. B9879KX)
This lead is mainly used to connect to electronic circuits. The lead consists of 8
signal lines (red) and 2 earth lines (black).