# OCT output
## Specifications
### **NPN, PNP Output**
NPN Output
Power Supply
5-30V 200mA
Reverse Polarity Protection
Yes
Wiring
NPN, PNP
Current Consumption
200 mA @ 12V during stable operation at startup (excluding communication current)
## Wiring
### OCT NPN Output Wiring Diagram
* **Brown:** 24 VDC (+), **Blue:** 0 VDC (–), **Orange:** OCT Output (+), **Yellow:** OCT Output (−)
The OCT output circuit operates with a loop power of **5–30 VDC, 200 mA**. This function requires the brown and blue lines of the main DC power supply to be powered. For clarity, the DC power lines are omitted from this diagram. Refer to the [DC Power Wiring Diagram](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation.md#dc-power-wiring-diagram) for details.
### OCT PNP Output Wiring Diagram
**Brown:** 24 VDC (+), **Blue:** 0 VDC (−), **Orange:** OCT Output (+), **Yellow:** OCT Output (−)
The OCT output circuit operates with a loop power of **5–30 VDC, 200 mA**. This function requires the brown and blue lines of the main DC power supply to be powered. For clarity, the DC power lines are omitted from this diagram. Refer to the [DC Power Wiring Diagram](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation.md#dc-power-wiring-diagram) for details.
## OCT Parameter Configuration
Follow the steps below to configure OCT output parameters:
{% stepper %}
{% step %}
### Set Basic Parameters
* Refer to the [Parameter Settings](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup.md) page and complete the following steps: \
**Language Setting**, **Pipe Settings** — **A02:** Pipe Standard, **A04:** Pipe Outer Diameter, **A06:** Pipe Wall Thickness, **A08:** Pipe Material
* Execute **Z03 (Automatic Initialization)**.
{% endstep %}
{% step %}
### **Wiring Setup**
Connect the OCT output wiring according to the instructions on this page.
{% endstep %}
{% step %}
### E01 NC/NO (Normally Closed or Normally Open)
Set parameter **E01 NC/NO** to select the default state when there is no signal:
* **NC (Normally Closed):** Conducting when idle
* **NO (Normally Open):** Open when idle
{% endstep %}
{% step %}
### E02 OCT Definition (Output Signal Type)
Set parameter **E02 OCT Info** to specify the output signal type.
* **If "Pulse Output" is selected:**
1. Use **E03 Pulse Width** to set the duration of each pulse.
2. Use **F03** to simulate the pulse output and verify that the receiving end correctly receives the pulse count.
* **If "Pulse V2" is selected:**
1. Use **E03 Pulse Width** to set the duration of each pulse.
2. Use **E14 Pulse V2 Unit** to define the volume represented by each pulse.
3. Use **F03** to simulate the pulse output and verify that the receiving end correctly receives the pulse count.
* **If "Total Alarm" is selected:**
1. Use **D09 Total Alarm** to enable the alarm.
2. Use **D10 Total Trig.** to set the trigger condition:
* **"Greater than Target"** for forward flow
* **"Less than Target"** for reverse flow
3. Use **D11 Total Target** to specify the cumulative target:
* Positive value for forward flow
* Negative value for reverse flow
[*(See Note 1)*](#note-1)
* **If "Flow Alarm" is selected:**
1. Use **D05 FlowLIM Alarm** to enable the flow range alarm.
2. Use **D06 UP LIM** (Upper Limit) and **D07 Low LIM** (Lower Limit) to define the normal flow range.
> **Note:** If either **D06** or **D07** is adjusted, the other must also be set; otherwise the display may not function correctly. If both are unset, default values are **D06 = 100**, **D07 = 0**.
3. Use **D08 Hysteresis** to define the hysteresis operation method. Values must be positive and expressed as a percentage; larger values reduce repeated alarm triggers.
[*(See Note 2)*](#note-2)
{% endstep %}
{% step %}
### Return to the Main Screen. Complete.
{% endstep %}
{% endstepper %}
#### Note 1
```
D09, D10, D11 Total Alarm Examples
Example 1: Forward Flow
Enable D09 Total Alarm.
Set D10 Total Trig. to "Greater than Target".
Set D11 Total Target to a positive value, e.g., +100.
When the cumulative forward flow exceeds 100, the system triggers the total alarm.
Example 2: Reverse Flow
Enable D09 Total Alarm.
Set D10 Total Trig. to "Less than Target".
Set D11 Total Target to a negative value, e.g., −500.
When the cumulative reverse flow drops below −500, the system triggers the total alarm
```
#### Note 2
```
Flow Range Limit Alarm Example
D06 Upper Limit: 30 LPM
D07 Lower Limit: 10 LPM
D08 Hysteresis: 3% (default)
Calculations:
Range: 30 − 10 = 20 LPM
Hysteresis: 20 × 3% = 0.6 LPM
Alarm Behavior:
When flow exceeds the upper limit (30 LPM), the alarm is triggered.
The alarm will clear only when the flow drops below 29.4 LPM (30 − 0.6).
When flow falls below the lower limit (10 LPM), the alarm is triggered.
The alarm will clear only when the flow rises above 10.6 LPM (10 + 0.6).
```
---
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