Sharp Z-336J - Manual (Page 12)

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Chapter 2: Handling Precautions
Make sure to follow the precautions bellow who using the JW-20FL5/20FLT, JW-50FL (hereafter referred to
as this module) and Z-336J (hereafter referred to as this board).
(1) Installation
- Do not install or store this unit in the following conditions.
1 Locations close to a heating element
2 Sudden temperature changes which may cause condensation
3 Corrosive or inflammable gas
4 Vibration or hard jolts
- The minimum distance between nodes is specified in the regulations. (2.5 m when the 10BASE5
is used.) When connecting devices, be sure to maintain these minimum distances.
Cables used for 10BASE5 systems have marks every 2.5 m. Position each transceiver directly
on one of these marks.
- Mount the transceivers on electrically insulated objects, such as a wooden mounting block.
- Prior to installing or detaching the JW20H/30H or JW50H/70H/100H, make sure to turn OFF the
power supply to the PCs.
- Prior to connect the board, make sure to turn OFF the power to the J-board.
- Isolate the hub case electrically from the control panel chassis.
(2) Treatment
JW-20FL5/20FLT and JW-50FL
- For ventilation, holes are provided in the cabinet to prevent a temperature rise. Do not block
the ventilation holes. Good ventilation is necessary.
- Never allow a liquid such as water and chemical solution and a metallic object like a copper wire
inside this module to avoid a possible hazard. Otherwise, it may be a cause of machine
trouble.
- When a trouble or abnormal condition such as overheat, fume, or smoke is met, stop the
operation immediately, and call your dealer or our service department.
Z-336J
A J-board is a PC board which contains sensitive electronic parts. Therefore, be careful when han-
dling it.
1 Before touching the board with your hand, make sure to discharge all static electricity from
your body.
2 Do not touch the board if your hands are dirty or wet.
3 Do not put the board down on a conductive object (such as a metal plate).
(If a J-board with a CPU is placed on a conductive object, the battery terminals may be short
circuited and the back up memory will be lost.)
4 Do not handle any switches, connectors, or terminal blocks on the J-board using excessive
force.
(3) Grounding
- Connect the J-board FG terminal (on the terminal block on the CPU board) to an independent
class 3 ground. Do not share the ground with high voltage equipment.
- The hexagonal standoffs (supplied with each board) for assembling the J-board are used for
connecting the ground (FG). Make sure to tighten them securely.
(4) Wiring precautions
- Install the communication lines at a distance of 60 cm or more away from motor power lines or
high voltage lines.
- Do not route wires near equipment that generates electrical noise.
- Use category 5 10BASE-T shielded twisted pair cable.
- Use an isolated shield transformer to provide power to the hubs.
- We recommend using a transceiver cable that is 2 m or shorter.