Description

Applications

• 0 to 5A AC RMS range ideal for accurately measuring a typical current transformer
• 0 to 300vAC RMS range allows accurate supply voltage monitoring
• The 4179 measures standard input ranges and can be freely configured to customer defined input range.
• Can convert narrow AC current/voltage inputs to wide bipolar or unipolar outputs.
• Configurable input limits control the output value for increased safety

Features

• • The latest analog and digital techniques used to obtain the maximum accuracy and immunity to interference.
  • Possibility of output safety feedback by selecting S 4-20 mA output.
  • The current output can drive up to 800 Ohms, with an adjustable response time of 0-60.0 seconds.
  • Exceptional mA output load stability of <0.001% of span / 100 Ohm.
  • Meets the NAMUR NE21 recommendations, ensuring high accuracy in harsh EMC environments.
  • Meets the NAMUR NE43 recommendations, allowing the control system to easily detect an input error.
  • Each unit is tested to a high 2.3 kVAC, 3-port galvanic isolation level.

Excellent signal to noise ratio of > 60 dB.

• Output: Active unipolar or bipolar ±20mA, 2-wire 0-20mA, bipolar ±10V with direct or inverted action
• Universal AC or DC supply
• Programmable by way of detachable 4501 display front
• Modbus RTU output via 4511 deteachable display

4501 Display / programming front

Application:

• Communications interface for modification of operational parameters in 4179.
• Can be moved from one 4179 module to another and download the configuration of the first converter to subsequent converters.
• Fixed display for readout of process data and status

Technical characteristics:

• LCD display with 4 lines; line 1 (H = 5.57 mm) shows input signal, line 2 (H = 3.33 mm) shows units. Line 3 alternates between digital output value and scaling (kHz, Hz, mHz, P/m, P/h, P/d) or shows TAG no. Line 4 shows tendency readout for the input signal and communication status.
• Programming access can be blocked by assigning a password. The password is saved in the converter in order to ensure a high degree of protection against unauthorised modifications to the configuration.

4511 Modbus Communications Interface

Application:

• The 4511 detachable display adds Modbus RTU RS485 serial communications to all current and future 4000/9000 series units
• All individual unit operating parameters can easily and quickly be configured by using the Modbus communication or by using the front display menu
• The 4511 display can be used to read the process signal, simulate the output signal, indicate sensor errors and interna device errors

Technical characteristics:

• 4511 has full 4501 functionality for programming and display
• RS485 Modbus RTU protocol
• Multi-drop half-duplex connection via shielded RJ45 connector on top of module
• Modbus parameters such as address, baud rate, stop bit(s) and parity bits are configured from, and stored on, the 4511 interface
• 2.5kVAC galvanic isolation between serial wiring and 4000/9000 units

If required, Omni Instruments will program a 4179, 4501 or 4511 to your specific requirements. Please contact us for details.