PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers
Instruction Manual
16
Common Open Collector &
Relay Specifications
Number
Two open collectors & two relays
High or Low
Alarm
User programmable for high or low alarm
Alarm Deadband
0-100% FS, user programmable
Output
Assignment
Alarm, Timer, Stopwatch, or Disable
Alarm Output
Source
Assign to rate, total, grand total, or digital
input
On & Off Time
Delay
0 to 9,999 seconds
Fail-Safe
Operation
Independent for each open collector
and relay.
Fail-safe on, the output is on under
normal conditions.
Fail-safe off, the output is on under
alarm conditions.
Alarm Operation
Automatic, automatic with manual
override, latching (manual reset
anytime), latching with reset after
cleared (manual reset only after alarm
has cleared)
Alarm Indication
Programmable: red backlight, flashing
display, Bargraph segment flashes on alarm.
Backlight requires external 24 VDC.
Custom Alarm
Messages
Programmable for each relay/open collector:
8 characters maximum; displayed every 10
sec for 1 sec on bottom display. May be
turned off.
Alarm
Acknowledge
Front panel ACK button or external
digital input resets output and screen
indication.
Auto Initialization
When power is applied to the meter,
open collectors and relays will reflect
the state of the input to the meter.
Timer Output
One-shot or Continuous
Off Time Delay: 1 sec to 99:59:59
(hrs:min:sec)
On Time: 1 sec to 99:59:59 (hrs:min:sec)
Stopwatch
Output turns on when started and off
when stopped.
Open Collector Outputs
Rating
Isolated open collector, sinking NPN
5-30 VDC @ 150 mA maximum
Output
Assignment
Pulse, Alarm, Timer, Total Reset,
Stopwatch on/off, or Disable
Pulse Output
Source
Pulse output based on Rate, Total,
Grand Total, or Test Frequency, Alarm,
Timer, Total Reset, Stopwatch on/off, or
Disable
Pulse Output
Factor
0.000001 to 999,999.9
Pulse Width
0.5 ms @ 1 kHz; 500 ms @ 1 Hz;
50% duty cycle
Pulse Output
Frequency
1,000 Hz maximum
Quadrature Pulse
Output
Available for Output 2 (90° behind
Output 1) 500 Hz max
Alarm Output
Source
Assign to Rate, Total, Grand Total or
Digital Input
Solid-State Relays
Rating
250 VAC/VDC @ 1A resistive
75VA; 250VAC; 0.6A pilot duty
(inductive)
25VA; 250VDC; 0.6A pilot duty
(inductive)
Noise
Suppression
Metal oxide varistors across outputs
Relay
Assignment
Alarm, Sample, Timer, Batch, Stopwatch
on/off, or Disable
Alarm Output
Source
Assign to Rate, Total, Grand Total, or
Digital Input
Relay Runtime
Meter will keep track of how long each
relay has operated and display this
information.
Relay Cycles
Meter will keep track of how many times
the relays have cycled and display this
information.
4-20 mA Transmitter Output
Accuracy
±
0.05% FS
±
0.001mA
Output Source
Rate, total, re-transmit;
reverse scaling
allowed
Scaling Range
1.00 to 23.0 mA
Disable
High impedance state, less than 1 mA
Calibration
Factory calibrated 4.00 to 20.00 mA
Underrange
1.0 mA, 3.5 mA, or 3.8 mA
(If input < 3.5 mA); or Off;
user selectable
Overrange
20.5 mA, 20.8 mA, or 23.0 mA
(If input > 20.5 mA); or Off;
user selectable
Isolation
500 V input-to-output
Temperature Drift
0.5 µA/°C max from -40 to 75°C ambient
External Loop
Power Supply
7.0 VDC to 30.0 VDC maximum
Output Loop
Resistance
10-
750 Ω @ 24 VDC; 10-1100 Ω @ 30 VDC
On-Board Digital Input
Function
Remote operation of front-panel buttons,
acknowledge/reset relays, reset total,
reset max/min values, etc. See User
section of
for a complete list
of capabilities.
Contacts
2.1 VDC on contact. Connect normally
open contacts across DI+ and DI-
Logic Levels
Logic High: 2.4 to 30 VDC (max)
Logic Low: 0 to 0.9 VDC
