Human Interface

• Backlit LCD display of gas information

• Keypad to stop unit and acknowledge alarms

• Compatibility with GE’s acclaimed Perception™

software to download, trend and analyze

transformer data

Mark IV Improvements

• Completely overhauled with improved sensor

durability, new electronic boards and power

supply to make it RoHS compliant while

increasing device reliability and capabilities

• Local USB port to replace the RS-232 port no

longer found on most field laptops

• Digital output of registers using Modbus®

protocol communication over isolated RS-485

Controllers

The Hydran 201Ti can be connected to optional controllers to facilitate

communication with multiple units and create a local network.

• The Ci-1 controller is a one channel controller that replicates some of

the human interface functions (gas value display, alarm buttons). This is

ideal when the 201Ti is mounted out of reach on an upper valve of the

transformer. It also brings down the alarm relay contacts and the analogue

output for easier wiring.

• The Ci-C controller receives the gas ppm data from up to four 201Ti,

providing a single communication point for all four monitors. It has no

alarm relay or analogue output. This is ideal when protecting 3 single phase

transformers + 1 spare.

It is possible to “daisy-chain” up to 32 controllers or 201Ti through their RS-485

port. The maximum chain distance (all cables added up) is 1200m (4000ft). All

the 201Ti connected to any of the daisy-chained controllers can be accessed

through any controller in the local network, thus facilitating communication by

only having to fit one RS-232 modem for example.