Helios Large Display Analog Input Batch Controller Instruction Manual
PD2-6210
16
Figure 11. Voltage Input Connections
The meter is capable of accepting any voltage from -10 VDC to +10 VDC.
Modbus RTU Serial Communications
Serial communications connection can be made to the onboard RS485 terminal block or USB connector
shown in Figure 7. If RS232 is required, an RS485 to RS232 adapter (PDA7485) may be used. See
Ordering Information on page 5 for additional information.
Relay Connections
Relay connections are made to two six-terminal connectors labeled
RELAY1 – RELAY4 on Figure 7. 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 12. Relay Connections
-
+
+
Voltage
Signal
mA+
P-
2
1
3
5
4
P+
V+
COM
INPUT SIGNAL
mA+
P-
2
1
3
5
4
P+
V+
COM
INPUT SIGNAL
3-Wire Voltage
Transducer
Signal
-
4
3
6
5
2
1
RELAY4
RELAY3
4
3
6
5
2
1
RELAY2
RELAY1
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