Keithley 7705 User manual

Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
tek.com/keithley
Model 7705 Control Module
Instructions for use with DAQ6510
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Introduction
The Model 7705 40-Channel Single-Pole Control Module has 40 channels of independent switching. These
channels control power to the device under test (DUT) and switching loads. They can also directly control
equipment such as light indicators and relays.
Figure 1: Model 7705 40-Channel Single-Pole Control Module
Item shipped may vary from model pictured here.
The 7705 includes the following features:
▪Forty independent Form A switches
▪Two 50-pin D-sub connectors for use with the Model 7788 50-Pin D-Subminiature Connector Kit
▪A Model 7788 50-Pin D-Subminiature Connector Kit, which includes two D-sub connectors
The 7705 switching module can be used with the DAQ6510 Data Acquisition and Multimeter System.
If you are using this switching module with the 2700, 2701, or 2750, please see Model 7705 Control
Module User's Guide, Keithley Instruments document number PA-696.

Model 7705 Control Module Instructions for use with DAQ6510
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Connection information
Connection and wiring procedures in this document are intended for use by qualified
personnel only. Do not perform these procedures unless qualified to do so. Failure to
recognize and observe normal safety precautions could result in personal injury or death.
The 7705 switching module provides nonmeasurement functions. No channels are connected to the internal
digital multimeter (DMM) (the channels cannot be connected to the backplane). No channels are paired. You
can use the 7705 switching module to control external circuits.
Although the 7705 relays are latching type (relays hold their state even after power has been removed), all
relay states are set to open a few seconds after either a power cycle or a reset command is issued.
You can use control channels independently to close and open channels on the 7705. Refer to the instrument
reference manual section "Multiple channel operation."
For details on channel operation, refer to the instrument reference manual.
Figure 2: 7705 simplified schematic

Model 7705 Control Module Instructions for use with DAQ6510
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Module connections
Do not attempt to perform this procedure unless qualified to do so. Failure to recognize and
observe normal safety precautions could result in personal injury or death.
Do not exceed the maximum specifications for the 7705 switching module. Refer to the
specifications provided in the data sheet. Failure to recognize and observe normal safety
precautions could result in personal injury or death.
When looking at the rear connectors of the 7705 switching module, the connector on the left is P1000 and the
connector on the right is P1001, as shown in the following figure. Channel designations are shown in the
following table.
Figure 3: Model 7705 pinouts
Channel designations
P1000
P1001
CH
PIN
CH
PIN
CH
PIN
CH
PIN
CH
PIN
CH
PIN
1 IN
6
8 IN
25
15 IN
39
21 IN
6
28 IN
25
35 IN
39
1 OUT
8
8 OUT
26
15 OUT
40
21 OUT
8
28 OUT
26
35 OUT
40
2 IN
10
9 IN
27
16 IN
41
22 IN
10
29 IN
27
36 IN
41
2 OUT
12
9 OUT
28
16 OUT
42
22 OUT
12
29 OUT
28
36 OUT
42
3 IN
14
10 IN
29
17 IN
43
23 IN
14
30 IN
29
37 IN
43
3 OUT
16
10 OUT
30
17 OUT
44
23 OUT
16
30 OUT
30
37 OUT
44
4 IN
17
11 IN
31
18 IN
45
24 IN
17
31 IN
31
38 IN
45
4 OUT
18
11 OUT
32
18 OUT
46
24 OUT
18
31 OUT
32
38 OUT
46
5 IN
19
12 IN
33
19 IN
47
25 IN
19
32 IN
33
39 IN
47
5 OUT
20
12 OUT
34
19 OUT
48
25 OUT
20
32 OUT
34
39 OUT
48
6 IN
21
13 IN
35
20 IN
49
26 IN
21
33 IN
35
40 IN
49
6 OUT
22
13 OUT
36
20 OUT
50
26 OUT
22
33 OUT
36
40 OUT
50
7 IN
23
14 IN
37
27 IN
23
34 IN
37
7 OUT
24
14 OUT
38
27 OUT
24
34 OUT
38

Model 7705 Control Module Instructions for use with DAQ6510
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Connection log
You can use the table to record your connection information.
Channel
Color
Description
Description
Color
Channel
1
IN
IN
21
OUT
OUT
2
IN
IN
22
OUT
OUT
3
IN
IN
23
OUT
OUT
4
IN
IN
24
OUT
OUT
5
IN
IN
25
OUT
OUT
6
IN
IN
26
OUT
OUT
7
IN
IN
27
OUT
OUT
8
IN
IN
28
OUT
OUT
9
IN
IN
29
OUT
OUT
10
IN
IN
30
OUT
OUT
11
IN
IN
31
OUT
OUT
12
IN
IN
32
OUT
OUT
13
IN
IN
33
OUT
OUT
14
IN
IN
34
OUT
OUT
15
IN
IN
35
OUT
OUT
16
IN
IN
36
OUT
OUT
17
IN
IN
37
OUT
OUT
18
IN
IN
38
OUT
OUT
19
IN
IN
39
OUT
OUT
20
IN
IN
40
OUT
OUT

Model 7705 Control Module Instructions for use with DAQ6510
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Wire sizes
Make all connections using the correct wire size (up to 20 AWG). Use the 7788 Connector Kit to provide a high
quality connection to the 7705 switching module. Typical wiring connections are shown in the following figure.
All wiring must be rated for the maximum voltage in the system. For example, if 1000 V is
applied to the front terminals of the instrument, the switching module wiring must be rated
for 1000 V. Failure to recognize and observe normal safety precautions could result in
personal injury or death.
Figure 4: Typical connections for an indicator lamp, alarm, and relay
Installation
Before operating an instrument with an accessory switching module, verify that the switching
module is properly installed and the mounting screws are tightly fastened. If the mounting
screws are not properly connected, an electrical shock hazard may be present.

Model 7705 Control Module Instructions for use with DAQ6510
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To use the switching operations, a switching module must be installed in the DAQ6510.
If you are installing two switching modules, it is easier to install one switching module into Slot 2 first, then
install the second switching module into Slot 1.
If you have a Keithley Instruments Model 2700, 2701, or 2750 instrument, you can use your existing
switching module in the DAQ6510. Follow the instructions in your original equipment documentation
to remove the module from the instrument, then use the following instructions to install it in the
DAQ6510. You do not need to remove wiring to the module.
For inexperienced users, it is recommended that you do not connect a device under test (DUT) and
external circuitry to the switching module. This allows you to exercise close and open operations
without the dangers associated with live test circuits. You can also set up pseudocards to experiment
with switching. Refer to Pseudocards in the Model DAQ6510 Reference Manual for information on
setting up pseudocards.
To prevent electric shock that could result in injury or death, never handle a switching
module that has power applied to it. Before installing or removing a switching module, make
sure the DAQ6510 is turned off and disconnected from line power. If the switching module is
connected to a DUT, make sure power is removed from all external circuitry.
If a card slot is unused, you must install slot covers to prevent personal contact with high
voltage circuits. Failure to install slot covers could result in personal exposure to hazardous
voltages, which could cause personal injury or death if contacted.
Before installing or removing a switching module, make sure the DAQ6510 power is turned
off and disconnected from line power. Failure to comply may result in incorrect operation and
loss of data in the memory.
Required equipment:
▪Medium flat-blade screwdriver
▪Medium Phillips screwdriver
To install switching module into the DAQ6510:
1. Turn off the DAQ6510.
2. Disconnect the power cord from the power source.
3. Disconnect the power cord and any other cables that are connected to the rear panel.
4. Position the DAQ6510 so you are facing the rear panel.
5. Use the screwdriver to remove the slot cover screws and the cover plate. Retain the plate and screws for
future use.
6. With the top cover of the switching module facing up, slide the switching module into the slot.
7. Press the switching module in firmly to make sure the switching module connector is connected to the
DAQ6510 connector.
8. Use the screwdriver to tighten the two mounting screws to secure the switching module to the mainframe.
Do not overtighten.
9. Reconnect the power cord and any other cables.

Model 7705 Control Module Instructions for use with DAQ6510
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Remove a switching module
Before you remove a switching module, or begin any testing, make sure that all of the relays are
open. Since some relays may be latched closed, you must open all of the relays before removing the
switching module to make connections. Additionally, if you drop your switching module, it is possible
for some relays to latch closed.
To open all channels select Menu > Control > Open. If there are no channels closed, the Open button is not
selectable.If any channel is closed, then the Open button is active and selecting it will open all channels.
To prevent electric shock that could result in injury or death, never handle a switching
module that has power applied to it. Before installing or removing a switching module, make
sure the DAQ6510 is turned off and disconnected from line power. If the switching module is
connected to a DUT, make sure power is removed from all external circuitry.
If a card slot is unused, you must install slot covers to prevent personal contact with high
voltage circuits. Failure to install slot covers could result in personal exposure to hazardous
voltages, which could cause personal injury or death if contacted.
Before installing or removing a switching module, make sure the DAQ6510 power is turned
off and disconnected from line power. Failure to comply may result in incorrect operation and
loss of data in the memory.
Required equipment:
▪Medium flat-blade screwdriver
▪Medium Phillips screwdriver
To remove switching module from the DAQ6510:
1. Turn off the DAQ6510.
2. Disconnect the power cord from the power source.
3. Disconnect the power cord and any other cables that are connected to the rear panel.
4. Position the DAQ6510 so you are facing the rear panel.
5. Use the screwdriver to loosen the mounting screws that secure the switching module to the mainframe.
6. Carefully remove the switching module.
7. Install a slot plate or switching module in the empty slot.
8. Reconnect the power cord and any other cables.

Model 7705 Control Module Instructions for use with DAQ6510
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Operation
Before installing or removing a 7705 switching module, make sure the DAQ6510 power is
turned off and disconnected from line power. Failure to comply may result in incorrect
operation and loss of data in 7705 memory.
To prevent overheating or damage to the 7705 switching module relays, never exceed the
following maximum signal levels between any two inputs or chassis: Channels 1 to 40:
300 VDC or 300 VRMS (425 VPEAK) for AC waveforms, 2 A switched, 60 W, 125 VA.
Refer to the instrument documentation for operating instructions.
This switching module does not support current measurements. If the instrument has the TERMINALS switch
set to REAR and you are working with the slot that contains this switching module, the AC , DC , and digitize
current functions are not available. You can measure current using the front panel or using another slot that
contains a switching module that supports the AC , DC , and digitize current measurements.
If you use remote commands to attempt to measure current when configuring a channel, an error is returned.
Reactive loads
To prevent damage to the module, do not exceed the maximum signal level specifications of
the module. For reactive loads, be sure to use voltage clamping and current surge limiting.
The 7705 operation is specified for resistive loads, Refer to Typical connections (on page 5). Reactive loads
require voltage clamping for inductive loads and current surge limiting for capacitive loads to prevent damage to
the relays and to external circuitry.
Factory service
To return the switching module to Keithley Instruments for repair:
▪Call the Repair Department at 1-800-833-9200 or send an email to [email protected] for a
Return Material Authorization (RMA) number.
▪Carefully pack the instrument in the original packing carton.
▪Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping label.

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Safety precautions
The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required
to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the
product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low
transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.
Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test
fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.
Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.

10 077144900 / April 2018
For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.
Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the
specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
The symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in the
user documentation in all cases where the symbol is marked on the instrument.
The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personal
contact with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The symbol indicates a connection terminal to the equipment frame.
If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
properly disposed of according to federal, state, and local laws.
The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.
The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minor
injury or damage the instrument. Always read the associated information very carefully before performing the indicated
procedure. Damage to the instrument may invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits —including the power
transformer, test leads, and input jacks —must be purchased from Keithley. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may
only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other
suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through
Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement
component, call a Keithley office for information.
Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.
To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of the
instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that
consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never
require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board
should be returned to the factory for proper cleaning/servicing.
Safety precaution revision as of June 2017.