3.3.4 Wire the intrinsically safe Time Period Signal (TPS) or
Discrete output version using galvanic isolators
Micro Motion provides a galvanic isolator installation kit specific to wiring the Time Period
Signal (TPS) and Discrete versions of the meter in a hazardous area. Contact your local
sales representative or Micro Motion Customer Support at flow.support@emerson.com for
more information on ordering an isolator kit for your meter.
CAUTION!
• Meter installation and wiring should be performed by suitably trained personnel only in
accordance with the applicable code of practice.
• Refer to the hazardous area approvals documentation shipped with your meter. Safety
instructions are available on the Micro Motion Product Documentation DVD and
accessible on the Micro Motion website at www.micromotion.com.
The galvanic isolator kit (TPS/Discrete version) provides isolators for connecting the
following outputs. Use the provided isolators with the designated output.
Note
The RS-485 barrier is not isolated.
Output(s) Isolator
4–20 mA + HART MTL5541
• Time Period Signal (TPS)
• Discrete
MTL5532
Modbus/RS-485 MTL7761AC
Power MTL5523
Procedure
1. Wire the isolators to the appropriate output terminal and pins (see Figure 3-5).
Wiring
26 Micro Motion Compact Density Meter
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