Digital Input/Output Subsystems INTRODUCTION DB-16 DB-24 24-chann

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Digital Input/Output Subsystems INTRODUCTION DB-16 DB-24 24-chann

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AN-535 APPLICATION NOTE
Digital Input/Output Subsystems
INTRODUCTION DB-16 DB-24 24-channel digital subsystems providing reliable, solid state, optically isolated interface between data acquisition boards, such Analog Devices' RTI-800 series, distributed signal conditioning subsystems such Analog Devices' Model 6B50, discrete high level I/O. DB-16 manifold card that accepts single-channel digital input output modules. These solid state relay modules mixed matched provide interface inputs, outputs, inputs outputs. Each module individually controlled sensed digital data acquisition board 6B50 subsystem. DB-24 manifold card that accept 4-channel (quad) digital input output modules. These modules mixed matched well. Each module handles four channels identical levels, state each input output observed four LEDs each module. DB-16 DB-24 share same pinout 50-pin card edge connector used interchangeably. However, only channels addressable DB-16. external power supply maximum required operation.
trademarks property their respective holders.
DB-16 Digital Subsystem DB-16 Digital Backplane, shown Figure associated single-channel modules measure and/or control high level signals isolation digital required. Single-Channel Solid State Relays DB-16 supports installation singlechannel, solid-state relay modules, which provide 2500 peak optical isolation. should install modules their appropriate positions backplane secure them with screw each. output modules switch three amps. output modules provide zero voltage turn-on have (resistor-capacitor) snubber network increased capability with inductive loads. input modules designed with filtering input hysteresis high noise rejection transient-free "clean" switching. They designed that high voltage transients input cause damage module. Each module operates negative true logic, which digital voltage turns current module. Individual status indicators monitor module activity light when current ACTIVE. Each module position DB-16 backplane amp, pico-fuse (Littelfuse® Part Number 005) protecting module wiring from short circuits.
POWER BARRIER STRIP
BARRIER STRIP LOGIC SUPPLY INPUT
POWER LINE FUSE, SIGNAL CARD EDGE CONNECTOR
SLOT
PULL-UP RESISTOR 3.3k
Figure DB-16 Digital Backplane
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Table lists input output modules available with DB-16 backplane. Table Single-Channel Input/Output Module Summary
Type Input Model ID016 ID032 IA140A IA280A Output OD060 OA140A OA280A Range V-16 V-32 V-140 V-140 V-280 V-280 V-60 V-140 V-280 Output Current Input Current
Attaching Digital Applications DB-16 Backplane DB-16 backplane powered through external power supply. Applications DB-16 backplane connected through screw terminal barrier strip, which contains standard slot-head screw terminals (screw terminals associated with channel backplane; screw terminals associated with channel backplane, on). odd-numbered screw terminal high input; even-numbered screw terminal input. Figure illustrates high level digital wiring using input output modules DB-16 backplane. Example illustrates turning lamp off; example illustrates monitoring whether lamp off; example illustrates turning relay coil off; example illustrates monitoring whether relay coil energized.
115V SCREW OUTPUT MODULE4 CURRENT LIMIT RESISTOR1 SCREW INPUT MODULE4
115V
PULL-UP RESISTOR
SOCKETED PICO FUSE (5A)
Output
Input
+24V 115V SCREW OUTPUT MODULE4
RELAY COIL3
SCREW INPUT MODULE4
Output
Input
NOTES: 1SHOULD EXCEED 2USER SUPPLIED DIODE NECESSARY INDUCTIVE SPIKE DAMPING. 3RELAY COIL AMPERAGE SHOULD EXCEED OUTPUT MODULE RATING. 4MODULES COLOR CODED: INPUT YELLOW OUTPUT BLACK INPUT WHITE OUTPUT
Figure Typical High-Level Digital Wiring Examples Using DB-16 Backplane
AN-535
BARRIER STRIP
FUSE
FUSE
8-11
12-15 SLOT
16-19
20-23
DIGITAL CONNECTOR
Figure DB-24 Digital Backplane
DB-24 Digital Subsystem DB-24 Digital manifold card, shown Figure associated 4-channel modules measure and/or control high level signals isolation digital required. 4-Channel Solid State Relays DB-24 24-channel backplane that supports installation 4-channel, high-density modules perform input, input, output, output functions. install each module into socketed position DB-24 backplane, where each module held place with screws, provided with module. output modules able switch amps. output modules provide zero voltage turn-on have snubber network increased capability with inductive loads. input modules designed with filtering input hysteresis high noise rejection transient free "clean" switching. They designed that high voltage transients input will cause damage module. Optical isolation input output module rated 4000 input-to-output. Each module color-coded function model number clearly marked module itself. channel numbers associated with module printed below module panel spaces provided apply colored stick-on dots (supplied) match color coding modules (yellow input, black output, white input, output). Note that four channels corresponding quad module must configured with either input channels output channels. Each module DB-24 Digital Backplane operates negative true logic, which digital voltage turns current module. Four LEDs each module indicate status channels (the lights when current turned on). Each module position amp, picofuses protecting module wiring from short circuits. Table lists input output 4-channel modules available with DB-24 backplane. Table Quad Input/Output Module Summary
Type Input Model ID16FQ ID32Q IA120QA IA240QA Output OA240QA OD60Q Range V-32 V-60 V-140 V-140 V-280 V-280 V-280 V-60 Output Current Input Current
AN-535
Powering DB-24 Backplane power DB-24 Digital Backplane internally some boards, external power supply. Before attach DB-24 backplane board, must configure internal external power. configure DB-24 internal power, remove socketed fuse from left screw terminals. Install this fuse socketed position right screw terminals DB-24 backplane. configure DB-24 backplane external power, ensure that socketed fuse installed left screw terminals. Refer Figure Attaching DB-24 Digital Backplane attach DB-24 backplane data acquisition 6B50 board, 50-pin cable, such AC1585-9 cable CAB-03 cable (available from Analog Devices). Attach cable digital connector board attach other cable digital connector (J1) DB-24 backplane. Make sure that cable corresponds connector. Refer Figure
INSTALL FUSE EXTERNAL POWER
8-11
12-15 SLOT
16-19
20-23
EXTERNAL POWER SUPPLY
INSTALL FUSE INTERNAL POWER
Figure Positioning Fuse Internal External Power DB-24 Backplane
DB-24 BACKPLANE
BOARD
CAB-03 AC1585-9 CABLE
CONNECTOR
Figure Attaching DB-24 Digital Backplane
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Attaching Digital Applications DB-24 Backplane DB-24 Digital Backplane high level signals. Connect applications backplane through barrier strip. barrier strip contains standard slot-head screw terminals, screws each 4-channel (quad) module. 22-14 twistedpair wire, strip wire back approximately 0.25-inch (6.3 mm). Four consecutive input output applications attached single quad module, with channels sharing same common module. common connections each module connected another DB-24 backplane. Therefore, each four individual channels module either common connections. Since commons connected, must make sure that applications attached 4-channel module share same common voltage reference. applications different common voltage references, applications must attached different modules. Figure illustrates channels their commons connected.
CHANNEL COMMON
Figure DB-24 Backplane Common Connections
Figure illustrates high level digital wiring using input output modules DB-24 backplane. Example illustrates turning lamp off, example illustrates monitoring whether lamp off. Example illustrates turning relay coil off, example illustrates monitoring whether relay coil being energized. NOTE: channels screw terminals DB-24 backplane labeled from 1-24, while channels modules labeled 0-23. Keep this distinction mind when installing your field wiring applications.
115V CURRENT LIMIT RESISTOR1 115V
RELAY COIL3
115V +24V
Output
Input
Output
Input
NOTES: 1SHOULD EXCEED 2USER SUPPLIED DIODE NECESSARY INDUCTIVE SPIKE DAMPING. 3RELAY COIL AMPERAGE SHOULD EXCEED OUTPUT MODULE RATING. 4MODULES COLOR CODED: INPUT YELLOW OUTPUT BLACK INPUT WHITE OUTPUT-
Figure Typical High Level Digital Wiring Using DB-24 4-Channel Solid State Relay Modules
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POWER INPUT/OUTPUT LOGIC SUPPLY BARRIER STRIP
EDGE CONN BOTTOM LOGIC EVEN PINS FUSE (24) SIGNAL INPUT/OUTPUT +LOGIC +LOGIC
PULL-UP RESISTOR 3.3k (24) INDICATOR (24)
Figure Schematic Diagram Model DB-16
LOWER POWER BARRIER STRIP UPPER POWER BARRIER STRIP
FUSES (12) FUSE
PINS 2-50 TIED
SIGNAL INPUT/OUTPUT EDGE CONNECTOR
Figure Schematic Diagram Model DB-24
AN-535
SINGLE-CHANNEL SOLID STATE RELAYS
MOUNTING BACKPLANE INPUT SCREW TERMINALS INPUT FUSE OUTPUT MOUNTING BACKPLANE OUTPUT LOAD SCREW TERMINALS FUSE ZERO VOLTAGE CIRCUIT
PLUG-IN MODULE INPUT
PLUG-IN MODULE OUTPUT
+VCC 3.3k DOUT EDGE CONNECTOR
+VCC 3.3k EDGE CONNECTOR
Input Module
Output Module
MOUNTING BACKPLANE INPUT SCREW TERMINALS INPUT FUSE
PLUG-IN MODULE INPUT OUTPUT
COMMUTATING MOUNTING DIODE BACKPLANE LOAD SCREW TERMINALS OUTPUT FUSE
PLUG-IN MODULE
OUTPUT
AMPLIFIER +VCC 3.3k DOUT EDGE CONNECTOR
+VCC 3.3k IOUT EDGE CONNECTOR
Input Module
Figure
Output Module
OUTLINE DIMENSIONS
Dimensions shown inches (mm).
(43.2) (25.4) 4-40 HOLD DOWN SCREW
1.25 (31.8)
0.25 (6.4)
(15.2)
(2.54) GRID
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SCHEMATIC DRAWINGS
LOGIC
+VCC
COMMON SNUB SNUB
+VCC
COMMON
SNUB +VCC
SNUB
COMMON
Figure Output Module, OA240QA
LOGIC +VCC COMMON +VCC COMMON
Figure Input Modules, ID16FQ, ID32Q, IA120QA, IA24QA
+VCC
COMMON
Figure Output Module, OD60Q
OUTLINE DIMENSIONS
Dimensions shown inches (mm). Tolerance: ±0.020 (±0.50)
0.125R (47.5) (73.2) (12.7)
0.45 (11.43) (5.1)
(7.6) (5.1) (10.2) (22.9) (27.9) (33.0) 0.042 (1.1) DIA. PINS 4-40 0.75 (19.1) HEAD SCREW (53.3)
CASE COLORS: INPUT MODULES:
YELLOW WHITE
OUTPUT MODULES: BLACK
PRINTED U.S.A.
(5.1)
E3298-5-4/98

Digital Input/Output Subsystems INTRODUCTION DB-16 DB-24 24-chann

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