Omron FH-2 Series, Hardware Setup Manual, Page: 224 / 244

6-2 Encoder Interface
Encoder interface (line driver type) is supported only FH-2000/FH-5000 series.
6-2-1
FH-2000/FH-5000 Series
Precautions for Safe Use
• Check the following again before turning on the power.
Are the voltage value and polarity of the power supply that is provided to the encoder cable
(ENC0 VDD/GND, ENC1 VDD/GND) correct? (5 VDC)
• Use only the cables designed specifically for the product. Use of other products may result in
malfunction or damage of the product.
• Always turn OFF the power of the FH-L series Sensor Controller and peripheral devices be-
fore connecting or disconnecting a camera or cable. Connecting the cable with power sup-
plied may result in damage of the camera or peripheral devices.
• Since cables to which bending is frequently applied is easily broken, use the robotic cable
type (bending resistant cable) to prevent damages.
• Do not apply torsion stress to cables. If not, it may cause damage to cables.
• Secure the minimum bending radius of cables. If not, it may cause damage to cables.
Precautions for Correct Use
• Check the following items on the communications cables that are used in the network.
- Are there any breaks?
- Are there any shorts?
- Are there any connector problems?
• When you connect the cable to the communications connectors on devices, firmly insert the
communications cable connector until it locks in place.
• Do not lay the communications cables together with high-voltage lines.
• Do not lay the communications cable near devices that generate noise.
• Do not lay the communications cables in locations subject to high temperatures or high hu-
midity.
• Do not lay the communications cables in locations subject to excessive dirt and dust or to oil
mist or other contaminants.
Interface Specification
Item Specifications
Input voltage
Input voltage: 5 VDC ±5 %, Signal level: EIA Standard, RS-422-A line driver
level
Input impedance
*1 120 Ω ±5 %
Differential input voltage
High-level input voltage: 0.1 V
Low-level input voltage: -0.1 V
Hysteresis voltage 60 mV
Maximum response frequency
*2
Phase A/B/Z: 1 MHz
(When using an I/O cable, model FH-VR 1.5M)
*1. Value when the terminal resistance function is used.
*2. Use this interface as paying attention to the cable length and response frequency of the encoder used.
6 I/O Interface
6-30
FH Series Vision System Hardware Setup Manual (Z366-E1)