3.6.2 Analog input settings
The The 960-24
™
MSTS has the capability to sample analog temperature (Analog
Input 1) and pressure (Analog Input 2) with 4-20 mA signals. These analog input
signals are configured to sink. The two independent analog input circuits are
configured for conventional 4-20 mA service. Also, 24 VDC isolated power supply
connection is provided for an external power source. Refer to the Field wiring
diagram DMC-004936 in Engineering Drawings.
3.6.3 Analog output settings
The 960-24
™
MSTS provides two 4-20 mA analog output signals that are software
configurable for either sink or source current (see Engineering Drawings, drawing
DMC-004936).
Full HART
®
functionality is provided so that any commercially available HART
®
transmitter which meets the specifications of the HART
®
Communications
Foundation can be connected to the Rosemount 3814 Liquid Ultrasonic Flow
Meter.
Analog Output 2 (AO2) is user-configurable as a conventional 4-20 mA output.
3.6.4 Digital input
The 960-24
™
MSTS 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 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 server disabled DHCP server enabled
DHCP OFF ON
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:
Installation manual Electrical Installation
00825-0100-3814 January 2023
Rosemount 3814 Liquid Ultrasonic Flow Meter 57
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