Super Systems eFLO - Manual (Page 8)

eFlo Electronic Flow Meter Operations Manual
Super Systems Inc. Page 8 of 25
9-Pin D-Sub Pin
Number
Wire-In Color Signal Type Description
1 Red + VDC Power Supply 24 VDC (250 mA)
2 Black - VDC
3 Green + mA Output Flow Signal (4 – 20 mA)
4 White - mA
5 Orange + mA Input Setpoint Signal (4 – 20 mA)
6 Blue - mA
7 Brown + RS485 Communications Signal provided by
Modbus over serial. 8 Yellow - RS485
9 Purple 24V Sinking
Output
Flow Alarm Output
NOTE: The alarm current should have a
maximum current rating of 100mA. An
isolation relay with fly-back diode should
be used if the output is driving an
inductive load (such as a contactor or
horn).
Table 3 - Electrical Connections
NOTE: If RS-232 is needed, an additional 9-pin D-Sub connector can be set up on the eFlo unit
prior to shipment.
Modbus Registers
The eFlo Modbus registers are as follows.
Modbus Register
Number
Description
16 Actual Flow
17 Flow Sensor mA Input Value
18 Flow Setpoint
19 Decimal Place for Display of Flow and Setpoint
20 Instrument Modbus Address
21 Flow Meter Full Scale Value
22 Control Gain
23 mA Zero Value
24 mA Span Value
25 Deadband for Control
26 Setpoint Zero
27 Setpoint Span
28 Not Used
29 Analog Output Zero in Flow Units
30 Analog Output Span in Flow Units
31 Not Used
32 Low Flow Alarm Setpoint
33 High Flow Alarm Setpoint
34 Alarms