6
Model EA91A＆EA90A
2.7 Construction
2.7.1 Lever Type
2.7.2 Built-in Cam Type
Cam
Restriction
Output Air Connection
Output Pressure Gauge
Auto/Manual Switching Screw
Zero Adjustment Knob
Terminal Box
Conduit Connection
Nozzle
Flapper
Body
Stroke
Adjustment Knob
Supply Pressure Gauge
Supply Air Connection
Pilot
(Valve)
Right-hand lateral face
4〜20mA DC
Safety earth
Earth bus bar
Source
The safety barrier which is used in combination with electro-pneumatic positioner EA90A must be
※2
TIIS certified type.
For the safety barrier selection, please refer to the following data for Intrinsically safe approval of
model EA90A.
① Performance classification and Group
ia II C
② Permissible maximum values
Ui = 30V, Ii = 100mA , Pi = 0.75W
③ Parameters
Ci = negligibly small
Li = negligibly small
To combine with a safety barrier
2.6.2 Model EA90A Electro-Pneumatic Positioner (Intrinsic Safety Type)
Hazardous area
Non hazardous area
C
a
u
ti
o
n
※2
TIIS ; Technology Institution of Industrial Safety (JAPAN)
※ Motoyama distribute recommended safety barriers (MTL made, 787S+ 728+ type). If you are interested or have any
questions about the product, please contact our sales offices or sales agents.
Electro-pneumatic positioner
EA90A
Safety barrier
General device
