4Gas Max. (mg/m3)NH3 0.05Cl2 0.01NO 2 0.04Cooling systemThe device provides left-side intake and right-side exhaust airflow. For adequate cooling, make surethe following requirements are met:• A minimum clearance of 100 mm (3.94 in) is reserved around the inlet and outlet air vents.• The installation site has a good cooling system.Figure 1 Airflow through the device chassisESD preventionESD prevention guidelinesTo prevent electrostatic discharge (ESD), follow these guidelines:• Make sure the device and the workbench or rack are reliably grounded.• Take dust-proof measures for the equipment room. For more information, see "Cleanliness."• Maintain the humidity and temperature at acceptable levels. For more information, see"Temperature and humidity."• Before working with the device, wear an ESD wrist strap or gloves and ESD clothing, andremove conductive objects such as jewelry or watch. Make sure the wrist strap makes goodskin contact and is reliably grounded.• Place a removed component such as interface module on an ESD workbench or put it in anantistatic bag, with its component side facing up.Attaching an ESD wrist strapCAUTION:Before you attach an ESD wrist strap, make sure the rack or workbench is reliably grounded.No ESD wrist strap is provided with the device. Purchase one yourself.To attach the ESD wrist strap:1. Wear the wrist strap on your wrist.2. Lock the wrist strap tight around your wrist to keep good contact with the skin.