External Wiring
Camera cable wiring
Use our optional ethernet cable.
Ethernet cables of category 5e STP are available. To avoid EMI, it is recommended to use the shielded cables. As a general rule, use higher category cables for applications with longer cables or applications require EMI countermeasures.
Either a straight or a crossing cable can be used to connect the GigE camera directly to a network adapter or to a network switch.
When installing the cables, cable length should be within 40 m.
When installing the cables, avoid close proximity to strong magnetic fields.
External Trigger Cable Wiring
Trigger input, strobe output, and 12VDC power supply for the GigE camera can be connected from the external trigger connector of the camera. Cable length should be shorter than 10 m.
Tip: GigE camera can be fed through the ethernet cable (PoE) as well as through the external trigger connector. Supply the power either through the external trigger connector or PoE. For details, refer to the following section.
Hardware - Power Specification
Pin assignment of the external trigger connector is shown below.
| Pin # | Name | Description |
|---|---|---|
| 1 | +12VDC | Camera + 12VDC power supply |
| 2 | T+ | Trigger input |
| 3 | - | Not connected |
| 4 | S+ | Strobe output |
| 5 | IO-GND | Trigger, strobe signal GND |
| 6 | DC-GND | Camera power supply GND |
Mating connector: HR10A-7P-6S(74) (Hirose)
CAUTION
Voltage outside of the specified range may cause damage. If the voltage of the power to the camera exceeds +13.2VDC, the camera will be damaged. If the voltage is less than +11.3V, the camera operation becomes unstable.
Use our optional connector or an equivalent product for trigger cable wiring. Also, use the twisted pair cables for each cable. (See below)
Tip:
To use an acA2500-14gm/gc camera in “Strobe” mode (external trigger mode), an external strobe lighting is necessary.
If the strobe is not used, the camera works in the rolling shutter mode and cannot recognize moving objects correctly.
Internal Circuit of Trigger Input
Triggers can be input via the external trigger connector. For details on internal circuit of the trigger input, see the figure below.
The inside is insulated by a photocoupler. Refer to the table below for the range of input voltage.
| Voltage | Significance |
|---|---|
| + 0 to + 24 VDC | Recommended operating voltage. |
| + 0 to + 1.4 VDC | The voltage indicates a logical 0. |
| > + 1.4 to + 2.2 VDC | Indeterminate logical value. |
| > + 2.2 VDC | The voltage indicates a logical 1. |
| +30.0 VDC | Absolute maximum; the camera may be damaged when the absolute maximum is exceeded. |
Response Speed of Trigger Input
Response speed with respect to the trigger input is as below:
Trigger Input Bounce Prevention
The GigE camera has a bounce prevention function to the trigger input. In order to use this function, set the time between 1 and 20000 micro seconds to TriggerDebounce property of the sequence properties (0: invalid). Note that the trigger input delays when this function is enabled.
KEY POINTS
This function is supported only for the GigE cameras. This is not available for the USB cameras.
Internal Circuit of Strobe Output
Strobe timing can be output via the external trigger connector. For details on internal circuit of the strobe output, see the figure below. Output circuit and the inside of the camera are insulated by a photocoupler.
The following table shows the range of controlable voltage to the strobe output line. The maximum sink current is 50 mA.
| Voltage | Significance |
|---|---|
| < + 3.3 VDC | The I/O output may operate erratically. |
| + 3.3 to + 24 VDC | Recommended operating voltage. |
| + 30.0 VDC | Absolute maximum; the camera may be damaged if the absolute maximum is exceeded. |
Response Speed of Strobe Output
Response speed to the strobe output is as follows.
Trigger Timing
| Symbol | Description |
|---|---|
| a | External Trigger Input |
| b | Shutter Timing |
| c | Strobe Output |
t1 ExposureDelay setting value
t2 ExposureTime setting value
t3 StrobeDelay setting value
t4 StrobeTime setting value
t5 External trigger prohibition period
(Unit for t1 to t4 : micro sec.)
KEY POINTS
Above response delay is added to each input and output.
Time is added to t1(ExposureDelay) as shown in the table below.
When using the acA2500-14gm/gc camera in “Strobe” mode (external trigger mode), an external strobe light is necessary.
If the strobe light is not used, the camera cannnot recognize moving objects properly since it operates in the rolling shutter mode.
| Camera model | t1 (ExposureDelay) addition time |
|---|---|
| acA640-100gm | 17.62 micro sec. |
| acA640-120gm | 17.62 micro sec. |
| acA1300-60gm | 43 micro sec. |
| acA1600-20gm/gc | 45.54 micro sec. |
| acA1600-60gm/gc | 41.50 micro sec. |
| acA2440-20gm/gc | 40 micro sec. |
| acA2500-14gm/gc | 848.00 micro sec. |
| acA2500-20gm/gc | 5 to 43 micro sec. |
| acA3800-10gm | 2900 micro sec. |
| acA3800-10gc | 2550 micro sec. |
| acA4024-8gm/gc | 2031 micro sec. |
| acA5472-5gm/gc | 3185 micro sec. |