27
3.2.10.3.
Keyboard
The ACM 150 monitor has a keyboard mounted on a slide-out drawer below the computer
assembly. To enter alphanumeric characters, pull out the keyboard only when needed.
Push the slide-out drawer back in to eliminate the risk of injury caused by the protruding
drawer.
3.2.11. Relay outputs
The ACM 150 monitor Relay Output Board is shown below. It has 86 relays. Relays #1 to
#80 are arranged in 4 rows of 20 relays. These are the programmable relays. By default,
they are preset to activate as follows:
Relay #1 to #40: Assigned in sequence to Areas #1 to #40. They are activated whenever
any gas monitored at the specific Area (sample point) exceeds the Alarm 1 level set point.
Relay #41 to #80: Assigned in sequence to Areas #1 to #40. They are activated whenever
any gas monitored in the Area exceeds the Alarm 2 set point.
The user can reprogram each relay's function, change the activation level, assign specific
gases and sample areas or groups of gases, and select sample areas.
Relays #81 to #86 indicate the following:
• 81 Power fail
• 82 Watchdog timer
• 83 Manual mode
• 84 General malfunction
• 85 General alarm 1
• 86 General alarm 2
To Next Page
Loading...
