Yokogawa 202 Field Mounting Rate Totalizer User Manual download pdf (Page 9)

1.3 INTRINSIC SAFETY CONSIDERATIONS

The Model 202A is certified for use in hazardous areas and has both CENELEC

and CSA NRTL/C approvals.

The Model 202A certification details are:

CENELEC Approval: Kema 98.E.1873.

Type of Protection: Ex ia.

Group: IIB.

Temperature Class: T4 at ambient temperature of 60°C.

CSA NRTL/C Approval

File Number: LR 104 840-5.

Type: Class 1, Groups C and D.

When installing in hazardous areas, the instrument will have to be installed

according to the guidelines given in section 6 and in accordance with standards

for wiring and installation in hazardous areas.

4-20mA Input

The input can be connected to IS circuits with the following maximum

values:

Ui = 28V

Ii = 93mA

Pi = 653mW.

Relay Outputs

The outputs can be connected to IS circuits with the following maximum

values:

Ui = 28V

Ii = 93mA

Pi = 653mW.

Introduction 7

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