Emerson Daniel 3812 Installation Manual page 59

Installation manual
3-9000-765
3.6.4 Digital input
provides one digital input that can be used as a general purpose input or used for
synchronizing calibration (for flow calibration gating-contact closure). The meter records
the volume seen between switch closures. The polarity of the input is configured as
normal or inverted polarity.
• Polarity is determined by the IsDI1ForCalActiveLow and the gating edge is determined
by the IsDI1ForCalStateGated (calibrate edge gated or calibrate state gated).
• Calibration is started via an inactive>active state change.
The digital input must be configured via the Daniel MeterLink Tools → Edit/Compare
Configuration page.
3.6.5 DHCP server switch settings
The meter can be configured to act as a DHCP server. The DHCP server is enabled/disabled
via CPU Module DHCP switch as follows:
Table 3-6: DHCP server switch settings
CPU Module switch
DHCP
3.6.6 Configuration protect switch settings
The meter's configuration parameters and firmware can be protected against changes via
CPU Module Write PROT. switch as follows:
Table 3-7: Configuration protect switch settings
CPU Module switch
WRITE PROT.
A complete list of write-protected parameters is in
3.6.7 External power source connection and fuse
Located inside the Transmitter Electronics Enclosure is a connector for a user-provided
external power source, a 2 Ampere fuse and a 24V loop power connection for ultrasonic
meter analog outputs, generator temperature or pressure transmitter devices. The
current is limited to 88mA.
Installation manual
DHCP server disabled
OFF
Configuration protected
ON (default)
Appendix
Electrical Installation
January 2019
DHCP server enabled
ON
Configuration unprotected
OFF
A.
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