Electrical Installation; Electrical Requirements - Max Machinery EX295 Instructions D'installation

Electrical Installation

The transmitter includes a wiring pigtail and 2 part connector - use of the pigtail is optional and direct wiring to the PCA is
recommended if the circuit board is accessible. Use wiring that is between 20 and 28 gauge and rated to at least 5°C above the
maximum ambient temperature, and rated to at least 80% of the maximum fluid temperature. Cut back the cable bundles' outer
sheath several inches to make it easier to coil the wire loop inside the housing. The pigtail connector's terminals correspond to the
terminal block on the PCA. Refer to the diagram below for wire number and functions.
Pulse Output
Pulse
Wiring PCB
Label
Power * V+
Common Com
Signal PhA
Output
(Quad only) PhB
Case Ground Case
* Consult Electrical Requirements Table

Electrical Requirements

The device must be powered with a Class 2 power supply. Electrical loads are specific to model number's:
Part #'s Transmitter Type
Pulse Output Transmitter
EX29x-0xx-0xx
Quadrature Output Transmitter
EX29x-1xx-0xx
mA Output Transmitter (24Vdc)
EX29x-2xx-0xx
mA Output Transmitter (12Vdc)
EX29x-2xx-1xx
V Output Transmitter (24Vdc)
EX29x-3xx-0xx
V Output Transmitter (12Vdc)
EX29x-3xx-1xx
Level Shifter Pulse Output
EX29x-6xx-0xx
Transmitter
Note: The addition of the "-S" suffix does not impact the electrical ratings.
Temperature class chart for all explosion proof variants:
100-
90 -
80-
75-
60-
40-
20-
-25
0
Fluid Temperature °C
Analog Output Wiring
Power V+
Common Com
Signal Output (+)
Sig
Signal Output (-)
Ret
Case Ground Case
100
90
75
T6
75
20 40 60
Analog Wiring
PCB Adaptor
Label Pin #
(Example: EX29x-051-000)
1 Case
2 5V
3 Ra
4 Rb
5 Com
Electrical Input
Requirements
5-28Vdc 40mA
5-28Vdc 50mA
24-28Vdc 50mA
12-15Vdc 100mA
24-28Vdc 50mA
12-15Vdc 100mA
5-28Vdc 30mA
T5 T4
90 130
80 120 130
100
2
Two Part Transmitter Wiring
Ex-Proof Sender
Case
5V
Ra
Rb
Com
Output Electrical Requirements
Single Line 0-5V 10mA (500 ohm pulldown or greater)
2 Lines 0-5V 10mA each (500 ohm pulldown or greater)
Isolated current loop, max 500 ohms in line, 12Vdc max
Isolated current loop, max 500 ohms in line, 12Vdc max
Isolated voltage loop, min 1000 ohms across line, 12Vdc
Isolated voltage loop, min 1000 ohms across line, 12Vdc
Single line, current sinking, max 28Vdc, max 25mA
Temperature Classification
Temperature class is a function of fluid temperature
used in the meter and ambient temperature. For
hot fluids, meter must be insulated and transmitter
must be left exposed. All transmitters are rated to
operate within the BLUE region, but only the remote
sender unit variants (EX29x-x5x-xxx or EX29x-x5x-
xxx-S) can operate up to the maximum temperatures
shown in the chart. Consult factory for installation
details when operating near temperature limits.
Note: Consult factory to determine the functional
temperature limit of your transmitter variant.
Temperature class ratings do not correspond with
the continuous duty area for the electronics within
the transmitter. A complete description of your
transmitter may be found on the Max Machinery
web site (www.maxmachinery.com). Individual
specification sheets and product family manuals are
also available for viewing or downloading.
Max Machinery, Inc.
maxmachinery.com
P: 707.433.2662
Remote Receiver
(Example: EX296-x8x-xxx)