PD2-6400
Helios High Voltage & Current Meter
www.predig.com
22
Relays
Rating:
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:
Noise suppression is recommended for each
relay contact switching inductive loads.
Deadband:
0-100% of span, user programmable
High or Low Alarm:
User may program any alarm for high or low trip
point. Unused alarm LEDs and relays may be disabled (turn off).
Relay Operation:
Automatic (non-latching) and/or manual reset
Latching (requires manual acknowledge) with/without clear
Pump alternation control (2 to 4 relays)
Sampling (based on time)
Off (disable unused relays and enable Interlock feature)
Manual on/off control mode
Relay Reset:
Digital inputs, or PC.
1. Automatic reset only (non-latching), when input passes the reset point.
2. Aut manual reset at any time (non-latching).
3. Manual reset only, at any time (latching).
RS485 Serial Communications Terminal
Compatibility:
EIA-485
Connectors:
Removable screw terminal connector
Max Distance:
3,937’ (1,200 m) max
Status Indication:
Separate LEDs for Power (P), Transmit (TX),
and Receive (RX)
Modbus
®
RTU Serial Communications
Meter Address/Slave ID:
1 - 247
Baud Rate:
300 - 19,200 bps
Transmit Time Delay:
Programmable between 0 and 199 ms
Data:
8 bit (1 start bit, 1 or 2 stop bits)
Parity:
Even, odd, or none with 1 or 2 stop bits
Byte-to-Byte Timeout:
0.01 - 2.54 seconds
Turn Around Delay:
Less than 2 ms (fixed)
Note: Refer to the Helios
Register Tables located at www.predig.com for details.
Isolated 4-20 mA Transmitter Output
Output Source:
Process channel A, V, or P, max or min for
channel A, V, or highest or lowest max or min of A and V, set points
1-8, Modbus input, or manual control mode
Scaling Range:
1.000 to 23.000 mA for any display range
Calibration:
Factory calibrated: 4.000 to 20.000 = 4-20 mA output
Analog Output Programming:
23.000 mA maximum for all
parameters: Overrange, underrange, max, min, and break
Accuracy:
± 0.1% of span ± 0.004 mA
Temperature Drift:
0.4 μA/°C max from 0 to 65°C ambient,
0.8 μA/°C max from -40 to 0°C ambient
Note: Analog output drift is separate from input drift.
Isolated Transmitter Power Supply:
Terminals I+ & R: 24 VDC ±
10%. Isolated from the input at >500 V. May be used to power the
4-20 mA output or other devices. All models rated @ 40 mA max.
External Loop Power Supply:
35 VDC maximum
Output Loop Resistance:
Power supply
Minimum
Maximum
24 VDC
10 Ω
700 Ω
35 VDC (external)
100 Ω
1200 Ω
MeterView Pro Programming Software
System Requirements:
Microsoft
®
Windows
®
XP/Vista/7/8/10
Communications:
Onboard USB (firmware version 4.0 or higher),
RS-232 Adapter or RS-485 Adapter
Meter Address:
1 - 247
Reports:
• Data logging: Save as CSV file format
• Configuration: Save as PDC file format or print
configuration
Baud Rate:
300 - 19,200 bps
Configuration:
One meter at a time
Protocol:
Modbus RTU (requires
P
ro
V
u
firmware version 4.0 or
higher)
*Note: Windows
®
32/64-bit operating systems
