Helios PD2-6262 Dual Analog Input Rate/Totalizer
Instruction Manual
19
Power Connections
Power connections are made to a two-terminal
connector labeled POWER. The meter will operate
regardless of DC polarity connection. The + and -
symbols are only a suggested wiring convention. There
are separate models for low voltage and high voltage
power. See
details.
Figure 11. Power Connections
Signal Connections
Signal connections are made to a nine-terminal
connector labeled SIGNAL. The COM (common)
terminals are the return for the 4-20 mA and the
10
V input signals. The two COM terminals connect to
the same common return, and are not isolated.
Current and Voltage Connections
The following figures show examples of current and
voltage connections.
There are no switches or jumpers to set up for current
and voltage inputs. Setup and programming is
performed through the programming buttons or
MeterView Pro software.
Figure 12. Transmitters Powered by Internal
Supply
Figure 13. Transmitters Powered by Ext. Supply or
Self-Powered
The current input is protected against current
overload by a resettable fuse. The display may or
may not show a fault condition depending on the
nature of the overload.
The fuse limits the current to a safe level when it
detects a fault condition, and automatically resets
itself when the fault condition is removed.
Figure 14. Voltage Input Connections
The meter is capable of accepting any voltage from -
10 VDC to +10 VDC.
Relay Connections
Relay connections are made to two six-terminal
connectors labeled RELAY1
– RELAY4. Each relay’s
C terminal is common only to the normally open (NO)
and normally closed (NC) contacts of the
corresponding relay. The relays’ C terminals should
not be confused with the COM (common) terminal of
the INPUT SIGNAL connector.
Figure 15. Relay Connections
AC or DC
POWER
Required External Fuse:
5 A max, 250 V Slow Blow
POWER
+
-
C
NO
NO
NC
NC
C
RELAY4
RELAY3
4
3
6
5
2
1
C
NO
NO
NC
NC
C
RELAY2
RELAY1
4
3
6
5
2
1
