MODEL: 22LA1
M4: Ao 4 points
P4: Pi 4 points
U4: Po 4 points
Multiplex Transmission System
MULTI-TRANSMISSION MODULE
Functions & Features
[2] POWER INPUT
AC Power
• Miniaturized, plug-in, socket-mounted version of the
multiplex transmission system
K: 85 – 132 V AC
• Analog, digital or pulse string signals transmitting via
twisted-pair cable
(Operational voltage range 85 – 132 V, 47 – 66 Hz)
L: 170 – 264 V AC
• No master station required
(Operational voltage range 170 – 264 V, 47 – 66 Hz)
DC Power
• Easy expansion up to 256 modules (2000 points)
S: 12 V DC
Typical Applications
(Operational voltage range 12 V ±10 %, ripple 10 %p-p max.)
R: 24 V DC
• Input and output processing for computer systems and
telemetering systems
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
• Complete system compatibility with DLA1 and other units,
utilizing the same communication protocol
GENERAL SPECIFICATIONS
Construction: Plug-in
72
(2.83)
Connection
Power input: M3.5 screw terminals
PWR
80
RUN
(3.15)
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
PU-2
❑
SA1
SA2
!
2
3
4
5
6
7
8
144
(5.67)
mm (inch)
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.
MODEL: 22LA1–3[1]–[2]
ORDERING INFORMATION
• Code number: 22LA1–3[1]-[2]
Specify a code from below for each [1] and [2]
(e.g. 22LA1-3A4-K)
125 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 0.5 A (resistive load)
TRANSMISSION MEDIA
3: Twisted-pair cable for small-scale system
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 cycles
8
[1] I/O SECTION
A1: Di 24 points (BCD)
A2: Di 16 points (BCD)
A4: Di 8 points
(rate 180/min.)
Self-diagnosis
Communication: The receiver modules detect loss of
communication and wire break.
CPU: Watch-dog timer
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
Memory: Sum check
Power voltage: Detects when the voltage supply to the CPU
drops.
COMMUNICATION
Communication: 2-wire, half-duplex
G4: Ai 4 points
M3: Ao 8 points
Transmission: conform to RS-422, EIA
http://www.m-system.co.jp/
22LA1 SPECIFICATIONS
ES-6554 Rev.8 Page 1/22