User manual

Digital Monitor AMC-1DBx Series User Manual
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Figure 4-3: Digital Monitor Components for the location of J34.
Figure 4-11 System Fault Connector
Table 4-11 shows the pin-out for the fail relay and terminal block.
Table 4-11: Fail Relay Terminal Block and Pin-out
Pin Signal
1 Normally Closed
2 Common
3 Normally Open
4.1.2.12 Analog Outputs
There are four integral analog outputs provided to drive VFD (variable frequency drive)
motors. Additional analog outputs are available with remote devices. The signal on the
analog output is a function (sensor average or peak, averaged over time) of the detected
gas levels found on the sensors within a zone. The integral analog outputs can be
configured with an switch for voltage or current mode.
An analog output can be configured for two ranges; 4-20mA or 0-20mA. These ranges
are with reference to current mode, but also determine the full range operation for
voltage mode. The 0-20mA range will give full range for voltage mode. In voltage mode
the integral analog output will swing from 0 to 10 volts when configured for full range. In
current mode the maximum load for an integral analog output is 500 ohms. Please refer
to 6.12.21 SET ANALOG OUTPUTS for complete configuration details.
Note: Failed sensors have a zero gas level and thus the analog output will reflect this.
Disabling a zone will return the analog output to its zero gas level. Disabling an active
analog output will leave it with its last gas level. In order to prevent this configure the
analog output to out of service mode.