JYTEK PXI-67921 User manual

PXI-67921
24-ch,Multiplexer DPDT Relay Module
User’s Manual
Manual Rev.:
Date:
Rev. 1.0
February 8, 2020

Copyright © 2020 Shanghai Jianyi Technology Co., Ltd. All Rights Reserved.
Disclaimer
The information in this document is subject to change without prior notice in
order to improve reliability, design, and function and does not represent a
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Table of Contents • i
Table of Contents
How to Use This Manual .............................................................. ii
Chapter 1 Introduction ..............................................................1
1.1 Features ............................................................................. 1
1.2 Applications ....................................................................... 2
1.3 Specifications ..................................................................... 2
1.4 Software Support ............................................................... 3
Chapter 2 Installation ................................................................5
2.1 Unpacking .......................................................................... 5
2.2 Mechanical Drawing ........................................................... 6
2.3 Installing the switch module into a PXI Platform ................ 6
Chapter 3 Signal Connection....................................................9
3.1 PXI-67921 Topology .......................................................... 9
3.2 PXI-67921 Pin Assignments & Descriptions .................... 10
3.3 TB-6221 Terminal Board .................................................. 13
2-wire MUX ........................................................................ 14
2-wire, 2-group MUX .......................................................... 15
2-wire, 4-group MUX .......................................................... 16
1-wire MUX ........................................................................ 17
4-wire MUX ........................................................................ 18
Chapter 4 Operation Theorem................................................19
4.1 Hardware Block Diagram ................................................. 19
4.2 Operation Mode ............................................................... 20
4.3 Handshaking .................................................................... 20
4.4 Trigger Bus ...................................................................... 24
4.5 Auxiliary Digital I/O........................................................... 26
4.6 Hot-Swap ......................................................................... 27
4.7 Emergency Shutdown ...................................................... 27
4.8 Watchdog Timer ............................................................... 28
Warranty Policy........................................................................31

ii • How to use this Manual
How to Use This Manual
This User Manual is designed to assist users in the installation of the JYTEK
PXI-67921, 24-ch Multiplexer DPDT Relay PXI Switch module.
Chapter 1 Introduction
Gives an outline and overview of JYTEK switch modules’
features, specifications, and applications.
Chapter 2 Installation
Describes how to install a switch module into a PXI chassis. For
software library and utilities installation, please refer to the
Software Users’ Guide.
Chapter 3 Signal Connection
Shows the pin assignments and terminal board connection of the
switch module.
Chapter 4 Operation Theorem
Describes function blocks on JYTEK switch modules and
operation instructions.

Introduction • 1
Introduction
JYTEK PXI-67921 is a relay multiplexer module which consists of 24 2-wire
relays (DPDT, 2 Form C). PXI-67921 provides 48x1 1-wire and 24x1 2-wire
and 12x1 4-wire configurations and typically connects one instrument, such
as a DMM, a digitizer or a signal source, with many points which need
measurement or excitation.
Relays of PXI-67921 can be updated by either direct-update mode or auto-
scan mode. The latter mode supports scanlist of 1k-sample for
deterministic scanning.
PXI trigger functions are fully supported and software programmable. The
multiple switch modules can be synchronized and triggered without additional
field wiring.
For safety critical applications, PXI-67921 module can switch to the preset
state by either asserting emergency shutdown manually, or watchdog timer
overflow event.
1.1 Features
•PXI specifications Rev. 2.0 compliant
•3U Eurocard form factor, CompactPCI compliant (PICMG 2.0 R3.0)
•PICMG 2.1 R2.0 CompactPCI Hot-Swap specifications compliant
•24-ch DPDT (2 Form C) non-latching relays
•Contact rating
•2A switching, 2A carrying
•220VDC, 125VAC
•125 operations per second
•1k-sample scanlist for deterministic scanning
•Provides handshaking signals to trigger external instruments
•Programmable emergency shutdown function and Watchdog timer for
safety critical applications
•Three auxiliary 3.3V/TTL digital inputs/outputs with 5V tolerance
•Supports PXI backplane triggers to synchronize multiple modules
•Fully software programmable
1

2 • Introduction
1.2 Applications
•Industrial ON/OFF control
•External high power relay driving and signal switching
•Laboratory automation
•Industrial automation
•Switch contact status sensing
•Limit switch monitoring
•Cooperating with other modules such as A/D and D/A peripherals to
implement a data acquisition and control system
1.3 Specifications
Relay Output
•Number of channels: 24
•Relay type: DPDT (2 Form C), non-latching
•Switching capacity:
•Max. switching current: 2A
•Max. switching voltage: 220VDC, 125VAC
•Max. switching power: 50VA, 60W
♦Max. carrying current: 2A
•Failure rate: 10µA
•Contact resistance: 100mΩ max.
•Relay set/reset time
•Operate time: 4ms max.
•Release time: 4ms max.
•Bounce time: 1ms max.
•Expected life:
•Mechanical life: 108 operations min.
•Electrical life: 5x105 operations min. (1A @ 30VAC, resistive load)
•Data transfer: Programmed I/O
Auxiliary Digital I/O
•Numbers of channel: 3 inputs/outputs
•Compatibility: 3.3 V/TTL (5V tolerant)
•Data transfers: programmed I/O
Handshaking Signals
•Programmable polarity
•Logic level: 3.3 V/TTL (5V tolerant)
•Trigger In source: TRG_IN, PXI trigger bus, PXI star trigger in
•Scanner Advanced destination: S_ADV, PXI trigger bus

Introduction • 3
Safety functions
•Emergency shutdown
•Logic level: 3.3 V/TTL (5V tolerant)
•Active with logic low (for AUX2/SHDNn pin)
•Emergency shutdown sources: SHDNn, PXI star trigger input, PXI
trigger bus
•Watchdog timer
•Base clock available: 10MHz, fixed
•Counter width: 32-bit
•Watchdog Timer Overflow sources: Onboard 32-bit watchdog
timer, PXI star trigger input, PXI trigger bus
General Specifications
•I/O Connector: 62-pin D-sub male
•Operating temperature: 0 to 55°C
•Storage temperature: -20 to 70°C
•Humidity: 5 to 95% non-condensing
•Power requirements (when all relays are activated simultaneously)
+5V +3.3V
1A 400mA
•Dimensions (not including connectors)
•160 mm x 100 mm
1.4 Software Support
JYTEK's ADL-SWITCH driver package is for Microsoft Windows operating
systems, including Windows 98/ME/NT/2000/XP.
The driver package also provides utilities to test your switch module, as well as
programming samples and source codes in Microsoft Visual Basic and Visual
C/C++.
For other operating systems, please contact JYTEK for more information.

4 • Introduction
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