1. Check the Nameplate

Before wiring, be sure to check the flowmeter nameplate information to ensure it matches the on-site requirements. The nameplate contains key parameters such as the order number, power supply specification, additional functions, and input/output configuration.

Promag 53 nameplate information
  • Order number/serial number: Uniquely identifies the device, used for traceability and spare parts ordering.
  • Power consumption: Note whether the power type is 220VAC or 24VDC to avoid incorrect connection.
  • Additional information: Such as EPD/MSU (empty pipe detection electrode), ECC (electrode cleaning).
  • Input/output: -OUT(HART) is current output (HART); f-OUT is frequency output; STATUSIN is status input.
  • Reserved special product information: May include other special configurations depending on the order.
  • Ambient temperature: Ensure the working environment temperature is within the allowable range.
  • Protection class: Such as IP67, IP68, etc., which affects the installation method.
Promag 53 nameplate detailed parameters
  • Serial number: Unique device serial number.
  • Current output configuration: A indicates active, P indicates passive.
  • Relay configuration: NO indicates normally open, NC indicates normally closed.
  • Terminal assignment: Terminal number 1: AC L1, DC L+; terminal number 2: AC N, DC L-.
  • Configuration of terminals 20-27: Functions vary depending on the configuration.
  • Software version: Software version currently installed on the device.
  • Communication type: Such as HART, PROFIBUS PA, etc.
  • Current communication software information: Device version and device description.
  • Installation date: Device installation date.
  • Update date: Update date at 6 to 9 o'clock.

2. Wiring Between the Sensor and Transmitter of a Remote Mass Flowmeter

For remote installation, the sensor and transmitter must be connected via a dedicated signal cable. Please wire correctly according to the figure below and the color correspondence.

Schematic diagram of wiring between remote sensor and transmitter
  • a. Wall-mounted instrument housing connection part: Transmitter-side terminal.
  • b. Sensor connection housing cover: Sensor-side terminal.
  • c. Signal cable: Connects the sensor and transmitter.
  • d. Coil current cable: Supplies power to the sensor coil.
  • n.c. Not connected: Cable shield not connected.

The correspondence between cable colors and terminal numbers is as follows:

ColorTerminal number
Brown5/6
White7/8
Green4-GND
Yellow37/36

3. Transmitter Wiring

The transmitter is available in three forms: aluminum housing, stainless steel housing, and wall-mounted instrument. The wiring methods are similar. The maximum cable inner diameter is 2.5 mm².

1. Aluminum Housing Transmitter Wiring

Aluminum housing transmitter wiring diagram
  • a. Power supply cable: Terminal number 1: AC L1, DC L+; terminal number 2: AC N, DC L-.
  • b. Signal cable: Terminal numbers 20-27.
  • c. Protective grounding terminal: Connect to protective ground.
  • d. Grounding terminal for signal cable shield: Connect the cable shield.
  • e. Service interface: Connect service tools such as Fieldcheck and FieldCare.
  • f. Terminal compartment cover: Close after wiring.
  • g. Hexagonal screw cover lock: Secure the cover.

2. Stainless Steel Housing Transmitter Wiring

Stainless steel housing transmitter wiring diagram
  • a. Power supply cable: Terminal number 1: AC L1, DC L+; terminal number 2: AC N, DC L-.
  • b. Signal cable: Terminal numbers 20-27.
  • c. Protective grounding terminal: Connect to protective ground.
  • d. Grounding terminal for signal cable shield: Connect the cable shield.
  • e. Service interface: Connect service tools such as Fieldcheck and FieldCare.
  • f. Terminal compartment cover: Close after wiring.

3. Wall-Mounted Instrument Wiring

Wall-mounted instrument wiring diagram
  • a. Power supply cable: Terminal number 1: AC L1, DC L+; terminal number 2: AC N, DC L-.
  • b. Signal cable: Terminal numbers 20-27.
  • c. Protective grounding terminal: Connect to protective ground.
  • d. Grounding terminal for signal cable shield: Connect the cable shield.
  • e. Service interface: Connect service tools such as Fieldcheck and FieldCare.
  • f. Terminal compartment cover: Close after wiring.

4. Terminal Assignment

Promag 53 terminal assignment diagram

The Promag 53 provides various output types, and the terminal assignments are as follows:

1. Current Output

  • Active/passive output selectable, electrically isolated, time constant selectable (0.01..100s), full scale value adjustable.
  • Typical temperature coefficient: 0.005% o.r./°C (o.r. = of reading).
  • Resolution: 0.5 μA.
  • Active signal: 0/4...20mA, RL < 700Ω (HART: RL ≥ 250Ω).
  • Passive signal: 4...20mA; operating voltage Vs is 18..30VDC, Ri ≥ 150Ω.

2. Pulse/Frequency Output

  • Active/passive output selectable, electrically isolated (intrinsically safe Exi type only provides passive output).
  • Active signal: 24VDC, 25 mA (within 20ms, max.250mA), RL > 100Ω.
  • Passive signal: Open collector, 30V DC, 250 mA.
  • Frequency output: Cutoff frequency 2...10000 Hz (fmax = 12500 Hz), 2..5000Hz for EEx-ia occasions; on/off ratio 1:1, maximum pulse width 10 s.
  • Pulse output: Pulse value and pulse polarity selectable, maximum pulse width adjustable (0.05..2000 ms).

3. Status Output (Promag 50, Promag 53)

  • Open collector, max. 30V DC / 250 mA, electrically isolated.
  • Can be set to: fault message, empty pipe detection function (EPD), flow direction, limit value.

4. Relay Output (Promag 53)

  • Normally closed (NC or break) or normally open (NO or make) contacts selectable (default setting: relay 1 is NO contact, relay 2 is NC contact).
  • max. 30V / 0.5A AC; 60V / 0.1A DC, electrically isolated.
  • Can be set to: fault message, empty pipe detection function (EPD), flow direction, limit value, batch control contact.