Ronan X120 - Manual (Page 4)

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SPECIFICATIONS - MODEL X120 MULTIPLEXER/TERMINATION UNIT
Features
•
Monitors up to 48 switching devices
•
Reliable high-speed event transmission
•
Interfaces with most plant computers and the Ronan Model X110 Serial Input Visual Annunciator
•
Internal relay for self-test and power supply status
•
Digital filtering to assure accurate monitoring of status changes
•
Up to 32 units may be series connected to monitor up to 1,536 total inputs
•
Considerable savings in cable costs by the use of serial transmission
General Description
The Ronan Model X120 Multiplexer/Termination Unit is designed to continuously monitor up to 48 field contacts and/or
solid state switching devices. Any input status change is converted to serial data which can be transferred to a plant computer
or serial input display device, like Ronan’s Model X110 visual annunciator. The input signals are monitored using opto-
isolated input circuits to provide isolation between input signal voltages and the Model X120 logic circuits. The 48 inputs are
sequentially scanned on a continuous basis.
Input status changes are digitally filtered for a 16 millisecond period before being transmitted over the high speed serial line.
Self-test and watchdog timer circuits, in addition to power supply monitor circuits, are displayed by means of LED indicators.
Loss of a power supply voltage will de-energize the self-test relay.
Up to 32 Model X120 units can be daisy-chained to form a single serial output which monitors the status of up to 1,536 field
contacts or solid state switching devices.
Each Model X120 unit receives 5 VDC power to operate its internal logic. An isolated 125 VDC or 24 VDC voltage source
can be used to power the field contacts. The isolated power source, along with digital filtering, assures maximum noise
immunity for system operation.
Specifications
Input Voltage: X120 Logic: 5 VDC, 24 VDC, 48 VDC, 115 VAC, 125 VDC or 230 VAC
±
10%
Isolated Field Contact: 24 or 125 VDC
±
20%
Power Requirements: Isolated: 0.5 A @ 24 VDC plus 0.25 A @ 24 or 125 VDC
Non-isolated: 0.75 A @ 24 VDC
Capacity: 48 inputs
Protocol: Ronan Proprietary
Data Transmission:
Type Distance (Feet) Rate (Baud)
RS422/485 4000 2400
4000 4800
4000 9600
2000 19200
Universal Data Format: per point status change
# Symbol: Start of data string
2 Digits:Termination assembly ID
2 Digits:Point ID
1 Character:
O=Open, C=Closed, F=False Alarm (ignore message)
ODH Character: End of data string
Ronan Proprietary Data Format: Contact Factory