Yokogawa DA100 - Manual (Page 44)

IM DA100-01E 2-23
2
Installation and Wiring
2.7 Connecting an Extension Module to Extension
Bases
Using an extension module and extension bases, you can install input modules at a location
distant from the sub-unit(s). The module and bases are powered from the sub-unit and, therefore,
can be located even in a place where there is no power source nearby.
Installing an Extension Base
WARNING
• For fire prevention, use extension bases in an upright position.
Do not cover up the extension base's module (allow a clearance of at
least 3 cm around the module).
Ambient Temperature and Humidity
Use an extension base under the following environmental conditions:
• Ambient temperature: -10˚ to 60˚C
• Ambient humidity:
20 to 80% RH at -10˚ to 40˚C
10 to 50% RH at 40˚ to 50˚C
5 to 30% RH at 50˚ to 60˚C
Use the extension base in a condensation-free condition.
Note
Condensation may occur if you move the extension base from an area of low humidity to an area of high
humidity or if any drastic temperature variation takes place. In addition, a measurement error will result if
the DR recorder is in the thermocouple input mode. In that case, allow at least one hour for the extension
base to adjust to the ambient atmosphere before using it.
Do not install the extension base where:
• it is exposed to direct sunlight or there is a heat source nearby;
• soot, steam, dust and/or corrosive gas is relatively abundant;
• there is a strong electromagnetic source nearby;
• there is high-voltage equipment or a power line nearby;
• it is exposed to severe and/or frequent mechanical vibration; or
• it is not positioned stably.
Desk-top or Floor Installation
Attach the two supplied shoe plates onto the extension base with two screws (4-mm screws 16
mm long, supplied as standard accessories), as shown in the figure on the left below. Then, place
the extension base in an upright position. If the base is liable to fall on its side after wiring, fix
the shoe plates with the four supplied screws (4-mm screws 12 mm long) using the through-holes
(for 4-mm screws) of the shoe plates.
Direct Mounting on Panel
According to the figure on the right below, fix the extension base onto a panel by fastening the
four corners with the supplied screws (4-mm screws 12 mm long).