ES-6557 Rev.8

22LS1

Telemetering System

MODEM INTERFACE

(SIN-NET use)
Functions & Features
• Interfacing between SIN-NET devices (models:
22LA1, DLA1) and a modem for leased circuit
• Simple configuration by setting Station No. for pairing units with the front rotary witches
• Combined with our modems for leased circuit
Typical Applications
• 1-to-1 transmission system
• 1-to-N transmission system

MODEL: 22LS1–3–[1]

ORDERING INFORMATION

• Code number: 22LS1-3-[1]
Specify a code from below for [1].
  (e.g. 22LS1-3-K)

TRANSMISSION MEDIA

3: Twisted-pair cable for small-scale system

[1] 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.)

RELATED PRODUCTS

• Multi-transmission module
  Model: 22LA1
• RS cable
  Model: DCN5
• Modem
  Model: MOD1, MOD2, MOD3x, MOD5, MOD6, MOD7, MOD8,
  MOD4 (discontinued)

GENERAL SPECIFICATIONS

Construction: Plug-in
Connection
  Power input: M3.5 screw terminals
  SIN-NET, RUN contact output: Euro type connector terminal block
  RS-232-C: 9-pin D-sub connector (female)
  (M2.6 x 0.45 connector screw)
Housing material: Flame-resistant resin (black)
Isolation: RS-232-C to SIN-NET to RUN contact output to power
DIP switches: selecting modem type (SW1 – 4) and Master/Slave (SW8)
Terminator: Incorporated (remove jumper pin with those modules not located at the end of transmission line)
Station No. setting: 2 rotary switches; 00 – FF (256)
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 contact output: Contact opens in an abnormality.
125 V AC @ 0.5A (cosø = 1)
30 V DC @ 0.5A (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 × 107 cycles (rate 180/min.)
Self-diagnosis
Communication: receiving 'loss of RS-232-C
communication' data; multiplex transmission
error data; network error
CPU: watch-dog timer
Power voltage: detects when the voltage supply to the CPU drops.

MULTI-TRANSMISSION

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

MODEM / INTERFACE

Transmission: Conform to EIA RS-232-C
Communication: asynchronous, half-duplex, no procedure
Transmission speed: 50 – 2400 bps
RS-232C connector: 9-pin D-sub connector (female)
RS-232-C cable: Cross (provided by the user)

INSTALLATION

Power consumption
•AC: Approx. 4.5 VA
•DC: Approx. 4 W (160 mA at 24 V)
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: 500V AC @1 minute
(RS-232-C to SIN-NET to RUN contact output)
1500V AC @1 minute
(power to RS-232-C or SIN-NET or RUN contact output)
1500V AC @1 minute (FG to each section)

DESCRIPTIONS

■HOW TO SET STATION ADDRESSES
All units are connected in a series via a couple of modems. Assign to the pair of 22LS1 a number remote from those for 22LA1 units (such like FF, FE).
■DIP SWITCH SETTING
A) Modem type selecting:
Set SW1 through SW4 according to the type of modem combined with the 22LS1.
Transmission speed and format appropriate for each modem type are determined. If you change these settings, turn power supply to the unit off and on.
B) Master/Slave selecting:
Set SW8 of a 22LS1 unit to Master and one of the paired unit to Slave.
If you change these settings, turn power supply to the unit off and on.
■HOW TO CALCULATE TRANSMISSION SPEED
A) When the total number of inputs at one side of the pair of modems (one station) is at the maximum of 256 in contact and 32 in analog:
N1: number of 22LA1-3A4 units
N2: number of 22LA1-3E5/-3E6 units
N3: number of 22LA1-3G3 units
N4: number of 22LA1-3G4 units
The number of input units (N1 to N4) determines Data Volume:
•Contact Inputs
 B1 = (N1 + N2) × 6
•Analog Inputs
 B2 = (N3 + N4) × 3 + (N3×8 + N4×4) × 2
•Total Data Volume
 C0 = 5 + B1 + B2
Relation between the Total Data Volume and a time (Ta) required to transmit from one station (Master Station) is shown in the following equation:
Ta = C0 × A
where A is a parameter determined by the transmission speed of modems:
A = 0.2933 (50 bps)
A = 0.0333 (300 bps)
A = 0.0083 (1200 bps)
A = 0.0042 (2400 bps)
The transmission speed (Tb) for the other station (Slave Station) can be calculated in the same way.
Actual time (TA) required for a contact (or analog) input to be transmitted from Master Station to Slave Station varies according to timings of signal status change and transmission status, if there is no transmission error.
Ta ≤ TA ≤ Ta + Ta + Tb
B) When the total number of inputs at one side of the pair of modems (one station) is at the maximum of 256 in contact and 64 in analog:
When the total number of analog inputs exceeds 32, the 22LS1 divides them for transmission. Therefore time required for transmitting analog and contact signals are different.
N1: number of 22LA1-3A4 units
N2: number of 22LA1-3E5/-3E6 units
N3: number of 22LA1-3G3 units
N4: number of 22LA1-3G4 units
The number of input units (N1 to N4) determines Data Volume:
•Contact Inputs
 B1 = (N1 + N2) × 6
•Analog Inputs, first group
 B2 = 88
•Analog Inputs, second group
 B3 = [(N3 + N4) × 3 – 24] + (N3×8 + N4×4 – 32) × 2
•Total Data Volume, first group
 C1 = 5 + B1 + B2
•Total Data Volume, second group
 C2 = 5 + B1 + B3
•Contact Inputs
Relation between the Total Data Volume and a time (Ta) required to transmit contact inputs from one station (Master Station) is shown in the following equation:
Ta = C1 × A
where A is a parameter determined by the transmission speed of modems (see A).
The transmission speed (Tb) for the other station (Slave Station) can be calculated in the same way.
Actual time (TA) required for a contact input to be transmitted from Master Station to Slave Station varies according to timings of signal status change and transmission status, if there is no transmission error.
Ta ≤ TA ≤ Ta + Ta + Tb
•Analog Inputs
Relation between the Total Data Volume and a time (Ta) required to transmit analog inputs from one station (Master Station) is shown in the following equation:
Ta = (C1 + C2) × A
where A is a parameter determined by the transmission speed of modems (see A).
The transmission speed (Tb) for the other station (Slave Station) can be calculated in the same way.
Acutal time (TA) required for a contact input to be transmitted from Master Station to Slave Station varies according to timings of signal status change and transmission status, if there is no transmission error.
Ta ≤ TA ≤ Ta + Ta + Tb
■RUN CONTACT OUTPUT
RUN contact is turned off when one or more of the following three conditions occur:
•Failure of the 22LS1
Errors in power supply, memory, etc.
•SIN-NET communication errors
When there is an error occurs to 22LA1 or DLA1 units connected to the 22LS1.
•RS-232-C communication errors
When there is an error occurs in communication with the modem connected to the 22LS1 (communicating with the paired 22LS1 via leased circuit), such like wire breakdown.
[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.

EXTERNAL VIEW

CONNECTION DIAGRAM

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

SYSTEM CONFIGURATION EXAMPLES