Tellabs 9195

Tellabs 9195 is a Programmable Automation Controller (PAC) base designed for industrial field applications. It is specifically engineered for integration into automation systems in hazardous explosive areas (Zone 2) as well as safe areas. The device enables secure connection of field modules such as ISpac isolators to control networks, and is equipped with features including redundant power supply, replaceable fuses, and HART communication.

Key Specifications

• Explosion-proof Rating: II 3 G EEx nAC II T4 (suitable for Zone 2, Div. 2)
• Power Supply: 24 V DC, operating voltage range 19 V–31.2 V, residual ripple < 3.6 Vpp, with redundant power supply function
• Indicator Lights: 2 green LEDs (PWR1, PWR2)
• Fuses: 2 × TR5, 2.0 A, replaceable (for main power supply and redundant power supply)
• Channel Count: Supports connection of 8, 16, 32-channel field modules, with a maximum capacity of 32 channels
• Communication Interface: HART interface, connectable via dedicated plug or HART-Multiplexer 9192
• Environmental Conditions: Operating temperature –20 °C to +70 °C; storage temperature –40 °C to +80 °C; humidity ≤ 95%
• Mechanical Dimensions: Model 9195/08 weighs approx. 320 g; model 9195/16 weighs approx. 610 g; DIN rail or mounting plate installation available; protection class IP00 / IP20; housing material PA 6.6; flame retardant rating V0

Structure and Components

• Power Supply Module (main power supply + redundant power supply)
• Indicator Light Unit (PWR1, PWR2)
• Fuse Holder (accommodating replaceable TR5 fuses)
• Communication Interface (HART interface and dedicated plug)
• Module Slots (for installing field modules such as ISpac isolators)
• Housing (PA 6.6 plastic, providing IP00/IP20 protection)

Application Areas

• Field instrument and control systems in explosive hazardous environments such as petrochemical, natural gas, and oil refining industries
• Signal isolation between Safe Area and hazardous area (Zone 2) in process automation systems
• Critical process control points requiring redundant power supply and remote diagnosis

Installation and Maintenance Guidelines

Installation

• Install via DIN rail or panel mounting method, ensuring the housing protection class meets on-site requirements.
• Check the voltage range and verify correct wiring of the redundant power supply before connecting power.

Wiring

• Use cables compliant with explosion-proof standards and insert field modules into corresponding channels.
• Ensure good shielding of HART communication lines to prevent signal interference.

Commissioning

• After power-on, check the status of LED indicators to confirm normal operation of both main and redundant power supplies.
• Perform self-test via HART and check for error codes (e.g., PF, LF).

Maintenance

• Regularly inspect fuses for aging and replace them when necessary.
• Clean dust from the housing to keep heat dissipation channels unobstructed.
• Verify the integrity of housing seals under extreme ambient temperatures.