ES-6554 Rev.9
22LA1
Multiplex Transmission System
MULTI-TRANSMISSION MODULE
Functions & Features
• Miniaturized, plug-in, socket-mounted version of the multiplex transmission system
• Analog, digital or pulse string signals transmitting via twisted-pair cable
• No master station required
• Easy expansion up to 256 modules (2000 points)
Typical Applications
• Input and output processing for computer systems and telemetering systems
• Complete system compatibility with DLA1 and other units, utilizing the same communication protocol
MODEL: 22LA1–3[1]–[2]
ORDERING INFORMATION
• Code number: 22LA1–3[1]-[2]
Specify a code from below for each of [1] and [2].
(e.g. 22LA1-3A4-K)
TRANSMISSION MEDIA
3
: Twisted-pair cable for small-scale system
[1] I/O SECTION
A1
: Di 24 points (BCD)
A2
: Di 16 points (BCD)
A4
: Di 8 points
C1
: Do 24 points (BCD)
C2
: Do 16 points (BCD)
C7
: Do 8 points (relay)
C8
: Do 8 points (photo MOSFET relay)
E5
: Di 4 + Do 4 points (relay)
E6
: Di 4 + Do 4 points (photo MOSFET relay)
G3
: Ai 8 points
G4
: Ai 4 points
M3
: Ao 8 points
M4
: Ao 4 points
P4
: Pi 4 points
U4
: Po 4 points
[2] POWER INPUT
AC Power
K
: 85 – 132 V AC
(Operational voltage range 85 – 132 V, 47 – 66 Hz)
L
: 170 – 264 V AC
(Operational voltage range 170 – 264 V, 47 – 66 Hz)
DC Power
S
: 12 V DC
(Operational voltage range 12 V ±10 %, ripple 10 %p-p max.)
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
GENERAL SPECIFICATIONS
Construction
: Plug-in
Connection
Power input
: M3.5 screw terminals
Field I/O
: M3.5 screw terminals or 26-pin connector
Transmission
: Euro type connector terminal
Housing material
: Flame-resistant resin (black)
Isolation
: I/O to transmission to reset (provided only for pulse I/O type) to power
Terminator
: Incorporated (remove jumper pin with those modules not located at the end of transmission line)
Power indicator
: Red LED turns ON in normal conditions; OFF when the voltage level becomes low.
RUN indicator
: Red LED turns ON when the selfdiagnosis proves normal, OFF in an abnormality.
■
RUN Output
: Contact opens when the self-diagnosis detects an abnormality.
125 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 0.5 A (resistive load)
Maximum switching voltage
: 250 V AC or 125 V DC
Maximum switching power
: 62.5 VA or 60 W
Minimum load
: 10 mV DC @ 1 mA
Mechanical life
: 5 × 10
7
cycles (rate 300/min.) 10
8
cycles (rate 180/min.)
Self-diagnosis
Communication
: The receiver modules detect loss of communication and wire break.
CPU
: Watch-dog timer
Memory
: Sum check
Power voltage
: Detects when the voltage supply to the CPU drops.
COMMUNICATION
Communication
: 2-wire, half-duplex
Transmission
: conform to RS-422, EIA
Transmission speed
: 125 kbps
Data encoding
: SDLC
Control procedure
: NRZ
Protocol
: SIN-NET (dedicated protocol)
Error check
: CRC
Cable
: CPEV-0.9 dia.
Transmission distance
: 500 meters
INSTALLATION
Power consumption
•
AC
: Approx. 5 VA
•
DC
: 24 V or 12 V ±10 % (ripple 10 %p-p max.) approx. 4.4 W (180 mA with 24 V) with 8-point relays at the maximum load
Operating temperature
: -5 to + 50°C (23 to 122°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Atmosphere
: No corrosive gas or heavy dust
Mounting
: Surface or DIN rail
Weight
: 400 g (0.88 lb)
PERFORMANCE
Permissible power failure duration
: ≤ 10 msec.
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 500 V AC @ 1 minute
(I/O to transmission to reset*)
1500 V AC @ 1 minute
(power to I/O or transmission or reset*)
1500 V AC @1 minute (FG to each section)
*Reset terminals are provided only for pulse string I/O type.
DESCRIPTIONS
■ RUN Output (LED) Operation
Input unit
The LED for the Input Units (A1, A2, A4, G3, G4 and P4) turns ON when the network is on-line.
When there is an abnormality in the network, the LED turns OFF. The network is reconfigured after an abnormality.
Output unit
The LED for the Output Units (C1, C2, C7, C8, M3, M4 and U4) turns ON when the network is on-line and the unit receives data from the corresponding Input Unit.
When there is an abnormality in the network or there is no data receiving, the LED turns OFF.
When the I/O Units are connected via the 22LS1 (DLS)
, once the LED turns ON, it remains ON regardless of the state of Input Unit or the leased circuit.
When the Output Unit is connected to the DLC
(for setting data from the DLC), the LED turns ON once the Output Unit receives normal data, and remains ON even when there is no data update.
I/O Unit
The LED's operating conditions for the I/O Unit (E5 and E6) are combined ones of Input Unit and Output Unit.
Caution: When the network is reconfigured e.g. by noise interference, the RUN LED and output for all units on the network turn briefly OFF until they are turned ON after the reconfiguration is complete.
■
Station Number (Address)
A)
1 input unit and X output units
: Match the address for input and output modules. The input data can be output at several modules.
B) I/O mixed modules
: Set an even number and a consecutive number for the 2 corresponding modules.
C) Computer interface
: Set address numbers to correspond with the computer as I/O module.
■
Transmission Time
Integrate all the transmission time for each process input (or I/O-mixed) module in the system.
•Contact input, BCD, 16 points (A2) 1.5 msec.
•Contact input 8 points (A4) 1.5 msec.
•Contact I/O each 4 points (E5, E6) 1.5 msec.
•Analog input 8 points (G3) 12.0 msec.
•Analog input 4 points (G4) 6.0 msec.
•Pulse input 4 points (P4) 6.0 msec.
An analog module does not transmit all its signals in serial but does 1 point per each cycle. For example, when 1 contact input module (8 points) and 1 analog input module (4 points) are connected, 8 point contact signal and 1 point analog signal are transmitted in turn. One cycle time is therefore calculated as:
4 points × 1.5 msec. + 6 msec. = 12 msec.
This method is beneficial for giving a priority to contact signals which vary rapidly.
EXTERNAL VIEW
■ 22LA1-3A1, -3C1
■ 22LA1-3A2, -3C2
■ STANDARD TYPE
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
■ 22LA1-3A1, -3C1
■ 22LA1-3A2, -3C2
■ STANDARD TYPE
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM