Process Input; Relays - Ametek DDMC Instruction Manual

DDMC Analog Input Process Meter / Controller

Process Input

Inputs Field selectable: 0-20 mA, 4-20 mA
±10 V (0-5 V, 1-5 V, 0-10 V)
Modbus PV (Slave)
Isolated
Terminals P+ & P-: 24 VDC ±10%.
Transmitter
All models selectable for 24, 10, or 5 VDC
Power Supply
supply (internal jumper J4). 85-265 VAC
models rated @ 200 mA max, 12-24 VDC
powered models rated @ 100 mA max.
5 & 10 VDC supply rated @ 50 mA max.
Refer to Transmitter Supply Voltage
Selection (P+, P-) on page 15.
Accuracy ±0.03% of calibrated span ±1 count,
square root & programmable exponent
accuracy range: 10-100% of calibrated
span
Temperature
0.005% of calibrated span/°C max from
Drift
0 to 65°C ambient, 0.01% of calibrated
span/°C max from -40 to 0°C ambient
Input Signal Linear, square root, programmable
exponent, or round horizontal tank volume
Conditioning
calculation
Multi-Point 2 to 32 points for PV or PV1
Linearization 2 to 8 points for PV2 (Dual-scale Level
feature)
Programmable User selectable from 1.0001 to 2.9999 for
Exponent open channel flow
Round Diameter & Length: 999.999 inch or cm
Horizontal
calculates volume in gallons or liters
Tank respectively.
Low-Flow 0.0 to 999,999.9 (0 disables cutoff
Cutoff function). Point below at which display
always shows zero.
Decimal Point Up to five decimal places or none:
d. d dddd, d. d ddd, d. d dd, d . d d, d . d , or dddddd
Calibration Input Range
Range
4-20 mA
±10 V
An error message will appear if the input 1
and input 2 signals are too close together.
Input
Voltage ranges: greater than 500 kΩ
Impedance
Current ranges: 50 - 100 Ω (depending on
resettable fuse impedance)
Input Current input protected by resettable fuse,
Overload 30 VDC max. Fuse resets automatically
after fault is removed.
HART
The meter does not interfere with existing
Transparency HART communications; it displays the
4-20 mA primary variable and it allows the
HART communications to pass through
without interruption. The meter is not
affected if a HART communicator is
connected to the loop. The meter does not
display secondary HART variables.

Relays

Rating
Noise
Suppression
Deadband
High or Low
Alarm
Relay
Operation
Relay Reset
Time Delay
Fail-Safe
Operation
Minimum Span
Auto
Input 1 & 2
Initialization
0.15 mA
Additional
0.10 V
Relays
9
Instruction Manual
2 or 4 SPDT (Form C) internal and/or
4 SPST (Form A) external; rated 3 A
@ 30 VDC and 125/250 VAC resistive load;
1/14 HP (≈ 50 W) @ 125/250 VAC for
inductive loads
Noise suppression is recommended for
each relay contact switching inductive
loads. See Switching Inductive Loads on
page 17 for details.
0-100% of span, user programmable
User may program any alarm for high or
low trip point. Unused alarm LEDs and
relays may be disabled (turn off).
• Automatic (non-latching) and/or
manual reset
Latching (requires manual
•
acknowledge) with or without clear
• Pump alternation control (2-8 relays)
• Sampling (based on set point and time)
• Off (disable unused relays and enable
Interlock feature)
Manual on/off control mode
•
User selectable via front panel button, F4
terminal at back of meter, external contact
closure on digital inputs, or through serial
communications.
0 to 999.9 seconds, on & off relay time
delays. Programmable and independent for
each relay
Programmable and independent for each
relay.
Note: Relay coil is energized in non-alarm
condition. In case of power failure, relay will
go to alarm state.
When power is applied to the meter, relays
will reflect the state of the input to the meter.
An external module, model PDA1004-DB,
is available to add 4 SPST 3 A relays to the
meter.