Aalborg PWE Digital - Manual (Page 7)

Additionally, the PWE Flow Meter incorporates a Microcontroller driven circuitry
and non-volatile memory that stores all hardware specific variables. The flow rate
can be displayed in 29 different volumetric or mass flow engineering units. Flow
meter parameters and functions can be programmed remotely via the RS-232/RS-
485 interface or locally via optional LCD/KeyPad. PWE flow meters support vari-
ous functions including: two programmable flow totalizers, low, high or range flow
and temperature* alarms, 2 programmable optically isolated outputs, 0-5 Vdc / 4-
20 mA analog outputs (jumper selectable) for each process (flow and tempera-
ture*) variable, self diagnostic alarm. Optional local 2x16 LCD* readout with
adjustable back light provides flow rate, temperature*, total volume reading in cur-
rently selected engineering units, diagnostic events indication and feature a pass-
word protected access to the process parameters to ensure against tampering or
resetting.
2.2 Electrical Connections
PWE flow meter is supplied with “M16” cylindrical 12 pin connector. Pin diagram
is presented in figure b-1.
Figure b-1, PWE 12 Pin "M16" Connector Configuration
PIN PWE FUNCTION TYPE
A Plus Power Supply (+ DC power 11 to 26 Vdc) +Power
B
Common Power Supply, (DC power 11 to 26 Vdc),
Digital Common -Power,
Common
C
Flow Sensor Pulse Output (active), 3.3Vdc 3K min.
load impedance Output
Only
D
Digital Communication interface, RS485 (-)
(Optional RS232 TX) Input
/Output
E
Digital Communication interface, RS485 (+)
(Optional RS232 RX) Input
/Output
F Optical Output No.1 Plus (+) (passive) Input
G Optical Output No.1 Minus (-) (passive)
Return
for Pin F
H Optical Output No.2 Plus (+) (passive) Input
J Optical Output No.2 Minus (-) (passive)
Return
for Pin H
K
Common, Analog Signal Ground For Pins L & M,
(4-20 mA return) Signal
Common
L
Temp. Analog Output Plus (+) 0-5 Vdc or 4-20 mA,
jmp. selectable Output
Only
M
Flow Analog Output Plus (+), 0-5 Vdc or 4-20 mA,
jmp. selectable Output
Only
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