MS7018 switch input isolator (two in, two out)

Switch input isolator

Suitable for contact switches or NAMUR proximity switch inputs. Through isolation, the output is relay contacts (or transistors, level signals).

·Input line fault detection function (optional).

For switch isolators with input line fault detection function, when a line fault is detected, the line fault indicator LED on the instrument panel lights up in red. (Note: When using the line detection function, if a mechanical contact switch is required as an input device, a line fault sensor must be connected to the input circuit to avoid the switch isolator mistaking the normal on/off of the mechanical contact switch for an open or short circuit fault in the input circuit.)

When selecting a switch isolator without line fault detection function, there is no line fault indicator light on the instrument panel.

Dual channel, two inputs, two outputs.

Independent DC power supply is used for power supply, with power supply input-output and isolation between each channel

·Standard 35mm DIN rail card installation. Plug and unplug terminal block with spring compression connection.

● Power supply

Power supply voltage range: 20-30VDC

Rated supply voltage: 24V DC

Current consumption (24VDC power supply, relay output):<57 mA

● Input

Contact switches or NAMUR proximity switches that comply with DIN 19234.

Open circuit voltage: 8V ± 0.5V

Switching threshold: 1.2~2.1mA

Hysteresis: 0.2mA (typical value)

When there is a line fault, the open circuit current is less than 0.1mA; the short circuit current is greater than 4mA

● Output

Output type: ① Relay contact; ② Transistor; ③ Level signal

(Please select the output type when placing an order)

① Relay contacts

Contact characteristics: 24VDC, 2A;

Load type: resistive load

Response time: ≤ 10ms

② Transistor

External power supply voltage: ≤ 40V

Drive output current: ≤ 40mA

Transistor collector output high level: VCC; Low level: ≤ 2.5V

Transistor emitter output high level: Vcc-2.5V; Low level: ≤ 0.5V

③ Level signal

High level: 4.5V~5.5V

Low level: ≤ 0.5V

High level driving capability: ≤ 20mA

● Input/output characteristic description (in-phase control)

The factory setting state of the instrument is that the input and output are in phase, that is, the input switch is closed and the output relay is also closed (if it is a transistor output, the transistor is conductive; if it is a level signal output, the output is a high-level signal). The output status indicator light on the dashboard is on.

● Line fault detection

The factory setting of this instrument is that when an input line fault is detected, the fault detection indicator light on the instrument panel will light up, and the output relay contact will be in a released state (if it is a transistor output, the transistor will not conduct; if it is a level signal output, the output will be a low level signal).

● Instrument indicator light

LFD1 is the input line fault indicator light for ****** (the light is on when a line fault occurs)

LFD2 is the fault indicator light for the second input line (the light is on when a line fault occurs)

OUT1 is the output status indicator light of ***** channel (the light is on when the relay contact is engaged)

OUT2 is the second output status indicator light (the light is on when the relay contact is engaged)

POWER is the power indicator light (when the light is on, it indicates that the instrument is powered on)

(Note: If an instrument without fault detection function is selected, there will be no LFD1 and LFD2 indicator lights.). ）


● Comprehensive parameters

Isolation capability: 2.5KV.1min, 50Hz between input output power supply

Insulation resistance: ≥ 100M Ω/500VDC between input output power supply

Working environment temperature: -20~+60 ℃

Storage environment temperature: -40~+80 ℃

Environmental humidity range: 5~95% RH (non condensing)

Shell material: PC (polycarbonate)+ABS material

Protection level: IP 20

Dimensions: 16 × 116x110 (mm)