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Tektronix KEITHLEY 3722 Instructions Manual
Tektronix KEITHLEY 3722 Instructions Manual

Tektronix KEITHLEY 3722 Instructions Manual

Dual 1x48 multiplexer card

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Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-833-9200
tek.com/keithley
Introduction
The Model 3722 offers two independent banks of 1×48 two-pole multiplexers that are ideal for applications that
require a high channel count. The two banks can be automatically connected to the Series 3700A mainframe
backplane and optional DMM through the analog backplane connection relays. This connection allows the
mainframe to reconfigure the 3722 as a single 1×96 two-pole multiplexer or to enable card-to-card expansion for
even larger configurations. The latching electromechanical relays of this card can accommodate 300 V, 1 A
switched signal levels.
The 3722 uses two 104-pin D-sub connectors for signal connections. A solder style connector kit
(3722-MTC-1.5-KIT) and pre-assembled cable (3722-MTC-1.5/MM) are available for card connections. For more
information regarding available cards and accessories, refer to the Series 3700A System Switch/Multimeter and
Plug-in Cards datasheet, available at tek.com/keithley.
The 3722 card is shown in the following figure.
Item shipped may vary from model pictured here.
This document describes how to install the plug-in card and make connections to it. For information on scanning,
and on reading, writing, and controlling channels, refer to the Series 3700A System Switch/Multimeter Reference
Manual, available at tek.com/keithley.
077183500 October 2024
Model 3722 Dual 1x48 Multiplexer Card
Figure 1: Model 3722 Two-Pole Multiplexer Card
*P077183500*
Instructions
1

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Summary of Contents for Tektronix KEITHLEY 3722

  • Page 1 Model 3722 Dual 1x48 Multiplexer Card Keithley Instruments Instructions 28775 Aurora Road Cleveland, Ohio 44139 1-800-833-9200 tek.com/keithley Introduction The Model 3722 offers two independent banks of 1×48 two-pole multiplexers that are ideal for applications that require a high channel count. The two banks can be automatically connected to the Series 3700A mainframe backplane and optional DMM through the analog backplane connection relays.
  • Page 2 Model 3722 Dual 1x48 Multiplexer Card Instructions Safety precautions for connections Shock hazard. To prevent electric shock that could result in serious injury or death, comply with these safety precautions. Connection information for plug-in cards is intended for qualified service personnel. Do not attempt to connect devices under test (DUTs) or external circuitry to a plug-in card unless you are qualified.
  • Page 3 Model 3722 Dual 1x48 Multiplexer Card Instructions To install a switching card into the instrument mainframe: 1. Turn the instrument off. 2. Position the instrument so that you are facing the rear panel. 3. Disconnect the power line cord and any other cables connected to the rear panel. 4.
  • Page 4 Model 3722 Dual 1x48 Multiplexer Card Instructions Verify card installation To verify that the card was properly installed: 1. If the 3700A is controlled remotely (REM is displayed), press EXIT to switch control to local. 2. On the 3700A front panel, press SLOT. The name and firmware version of the instrument is displayed. 3.
  • Page 5 Model 3722 Dual 1x48 Multiplexer Card Instructions You can query the slot attributes to determine the capabilities of the installed switching modules. For example, send the following query to determine if slot 1 supports 4-wire commonside ohms channels: print(slot[1].commonsideohms) Refer to the Series 3700A System Switch/Multimeter Reference Manual for more information about using queries at tek.com/keithley.
  • Page 6 Model 3722 Dual 1x48 Multiplexer Card Instructions Connection information The 3722 uses two 104-pin D-sub connectors for signal connections, as shown in the following figure. A solder-style connector kit (3722-MTC-1.5-KIT) and pre-assembled cable (3722-MTC-1.5/MM) are available for card connections. The 3722 D-sub connection information: ▪...
  • Page 7 Model 3722 Dual 1x48 Multiplexer Card Instructions Cables and cable kits for the 3722 The following topics contain assembly instructions and characteristics for the Keithley Series 3700A System Switch/Multimeter cables and connector kits. To prevent electrical shock, observe the following safety precautions: ▪...
  • Page 8 Model 3722 Dual 1x48 Multiplexer Card Instructions Model 3722-MTC-1.5-KIT The Model 3722-MTC-1.5-KIT is a cable and connector kit that includes a 104-pin cable assembly. The cable assembly is 1.5 m (5 ft) long and is terminated with a D-sub plug on one end and a D-sub jack on the other end. Figure 6: 3722-MTC-1.5-KIT cable This kit contains the following items: ▪...
  • Page 9 Model 3722 Dual 1x48 Multiplexer Card Instructions 3722-MTC-1.5-KIT D-sub plug kit The Model 3722-MTC-1.5-KIT includes a 104-pin solder-cup connector kit terminated with a D-sub plug. Figure 7: Model 3722-MTC-1.5-KIT plug 3722-MTC-1.5-KIT D-sub jack kit The Model 3722-MTC-1.5-KIT includes a 104-pin solder-cup connector kit terminated with a D-sub jack. Figure 8: Model 3722-MTC-1.5-KIT jack Pin number identification Pin number identification for the Model 3722-MTC-1.5-KIT and Model 3722-MTC-1.5/MM D-sub connectors are...
  • Page 10 Model 3722 Dual 1x48 Multiplexer Card Instructions Connect drain wire to shield at both ends. Pins 9, 30, 31, and 32 are not connected. CONN 1 Paired wire colors CONN 2 First color Second First color Second color pin color pin Blue paired with white Orange paired with white Green paired with white...
  • Page 11 Model 3722 Dual 1x48 Multiplexer Card Instructions CONN 1 Paired wire colors CONN 2 First color Second First color Second color pin color pin Blue paired with black Orange paired with black Green paired with black Brown paired with black Slate paired with black Blue/white striped paired with black Blue/orange striped paired with black...
  • Page 12 Model 3722 Dual 1x48 Multiplexer Card Instructions The following table shows the power consumption of channel and backplane relays for the 3700A switch cards. The quiescent power is also shown. Model Quiescent power Channel relay power (P Backplane relay power ) (milliwatts) consumption each ) consumption each...
  • Page 13 Model 3722 Dual 1x48 Multiplexer Card Instructions Power budgeting example for six 3722 cards This example is for a fully loaded 3706A-S with all 3722 switch cards. Slot Card Channel relays closed Backplane relays closed 3722 15 (2-pole) 3722 15 (2-pole) 3722 15 (2-pole) 3722...
  • Page 14 Model 3722 Dual 1x48 Multiplexer Card Instructions Power budgeting example with multiple cards This example is for a fully loaded 3706A-S with a mix of switch cards. Slot Card Channel relays closed Backplane relays closed 3720 3721 3722 3723 25 (2-pole) 3730 3740 2 (high current)
  • Page 15 Model 3722 Dual 1x48 Multiplexer Card Instructions Channel Color Description CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 CH21 CH22 CH23 CH24 CH25 CH26 CH27 CH28 CH29 077183500 October 2024...
  • Page 16 Model 3722 Dual 1x48 Multiplexer Card Instructions Channel Color Description CH30 CH31 CH32 CH33 CH34 CH35 CH36 CH37 CH38 CH39 CH40 CH41 CH42 CH43 CH44 CH45 CH46 CH47 CH48 OUTPUT 2 CH49 CH50 CH51 077183500 October 2024...
  • Page 17 Model 3722 Dual 1x48 Multiplexer Card Instructions Channel Color Description CH52 CH53 CH54 CH55 CH56 CH57 CH58 CH59 CH60 CH61 CH62 CH63 CH64 CH65 CH66 CH67 CH68 CH69 CH70 CH71 CH72 CH73 CH74 CH75 077183500 October 2024...
  • Page 18 Model 3722 Dual 1x48 Multiplexer Card Instructions Channel Color Description CH76 CH77 CH78 CH79 CH80 CH81 CH82 CH83 CH84 CH85 CH86 CH87 CH88 CH89 CH90 CH91 CH92 CH93 CH94 CH95 CH96 077183500 October 2024...
  • Page 19 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.
  • Page 20 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.