The fixed monitoring system consists of two parts :

• 1. Monitoring Model gaZalarm
• 2. Sensing Model gaZsens

1. Model gaZalarm The monitoring unit consists of :

a) Power Supply Card: Size - 220 mm X 100 mm Supplies Power (9 V DC to 24 V DC) to complete system including gas detector assembly (Field Unit) with a current carrying capacity of one card is maximum up to 5 Amp. This can cater up to 10 cards in one rack. Multiple numbers of cards in multiple numbers of Racks in one panel can be provided if the numbers of channels are more than ten.

b) Control card: Control card provides fixed voltage & current required to the field unit. It also accepts 4-20 mA signal from field unit. This signal is then processed by control card using instrumentation amplifier. The processed signal corresponding to the gas concentration available in the field is displayed by two or three digit 7 segments LED on control card display section. Two level alarms (latching/non latching type) are generated if the gas concentration is above preset limit. Fault alarm also is provided on the control card in case of sensor open/ short, cable from sensor is open/ short & under range/ over range conditions appear. The control card also delivers 4-20 mA.(repeater) output Signal for PLC / DCS.

c) Facility Card: This card receives the alarm condition signal from control card. Depending upon the alarm conditions it activates the relays mounted on it & hoots the buzzer or siren or sends control signal to the pre-desired device. It also consists of alarm ACCEP, RESET & LAMP TEST conditions. The Push buttons are provided on the fascia plate to achieve the desired job.

d) Mother Board: This board is provided on the back of 19” rack. The Mother Board PCB is provided with the copper tracks & Euro Connectors to hold all the cards like Control Card, Power Supply Card & Facility card. With the help of proper design reduces the back panel wiring of all cards

FACILITY CARD

PRODUCT DESCRIPTION

The facility card forms part of gaZalarm control family and provide field wiring facilities for sensor and remote inputs, analogue outputs, power in/out and relay out. Each group of 12 PI 00 cards require facility card.The options for relay outputs provide flexibility in system design to suit the application requirements.

Features

• Sensor Interface
• Relay options
• Support all alarm functions
• Remote inhibit/reset facility
• Accepts up to 2.5mm2 cable
• Push buttons:
  • ACCEPT: for Audio Alarms Acknowledge
  • RESET: To reset the visual alarm status
  • LAMP: to test the LED's working status

INTERFACE CARDS :

• Double SPDT relay card
• 3 single pole, changeover relays (A1, A2, F)

POWER SUPPLY CARD ( gaZalarmPSU )

• 1. Monitoring Model gaZalarm
• 2. Sensing Model gaZsens

PRODUCT DESCRIPTION

The power supply card are part of gaZalarm control family and provide field wiring facilities for sensor and remote inputs, analogue outputs, power in/out and relay out. Each group of 12 PI 00 cards require common power supply card.

FEATURES:

• Common for max. up to 12 PI 00 cards
• Provide multi output
• Visual Indication for all outputs
• Fuse protection for all outputs
• Over-load protection

PRODUCT DESCRIPTION

The ICM 07 single Intelligent control module forms part of the Intelligent gaZalarm control family and provides sensor control, signal processing and comprehensive alarming of any resulting gas detected. There are two versions; one is for IR / Catalytic combustion type for combustible gas detection and the other is electrochemical for oxygen / toxic gas detection like (HS, CO) etc.,

2 accept 4-20 mA signal from sensor transmitter. The card input function is selected by a specific plug-in module; optional output modules are also available.Each card has alpha numeric LED display which displays sensor readings in numerical form and provides intelligent status information in alphabetical form.