ProtEX PD8-6080/PD8-6081 Explosion-Proof Modbus
®
Scanner Instruction Manual
8
Math Functions
Name
Math Operation (Examples)
(P = Adder, F = Factor)
Setting
Addition
(PV1+PV2+P)*F
Sunm
Difference
(PV1-PV2+P)*F
diF
Absolute
difference
((Abs(PV1- PV2)+P)*F
diFAbS
Average
(((PV1+PV2)/2)+P)*F
AvG
Multiplication
((PV1*PV2)+P)*F
Nmulti
Division
((PV1/PV2)+P)*F
divide
Max PV
Max value of all selected PVs
Hi-pv
Min PV
Min value of all selected PVs
Lo-pv
Draw
((PV1/PV2)-1)*F
drAuw
Weighted
average
((PV2-PV1)*F)+PV1
uwavg
Ratio
(PV1/PV2)*F
Ratio
Concentration
(PV1/(PV1+PV2))*F
Concen
Math 2
Math on other math channels
Nmath2
Programmable
Constants
Constant P (Adder): -99.999 to 999.999,
default: 0.000
Constant F (Factor): 0.001 to 999.999,
default: 1.000
Serial Communications
Compatibility
EIA-485
Connectors
Removable screw terminal connector
Max Distance
3,937' (1,200 m) max
Status
Indication
Separate LEDs for Power (P), Transmit
(TX), and Receive (RX)
Scanner Id
1
– 247 (Scanner Modbus address)
Baud Rate
300
– 19,200 bps
Transmit
Time Delay
Programmable 0 to 4999 ms
This is the time the scanner will wait for a
slave to respond before sending another
request on the bus. This value should be
greater than 100 ms to avoid collisions on
the bus.
Data
8 bits (1 start bit, 1 or 2 stop bits)
Parity
Even, Odd, or None with 1 or 2 stop bits
Byte-To-Byte
Timeout
0.01
– 2.54 second
Turn Around
Delay
Less than 2 ms (fixed)
Note: Refer to the P
RO
V
U
®
Scanner Modbus Register
Tables located at www.predig.com.
General
Input/output
Modbus RTU over RS-485, Two analog
inputs (4-20 mA,
10 V)
Display
Line 1: 0.60" (15 mm) high, red LEDs
Line 2: 0.46" (12 mm) high, red LEDs
6 digits each (-99999 to 999999), with lead
zero blanking
Display
Intensity
Eight user selectable intensity levels
Overrange
Values greater than
999999
cause the
display to flash
999999
Underrange
Values less than
-99999
cause the
display to flash
-99999
Programming
Methods
Four front panel buttons, digital inputs, PC
and ScanView software, or Modbus
registers.
Max/Min
Display
Max/min readings are stored until reset by
the user or when power to the scanner is
turned off. User can reset by front panel
pushbuttons, digital input, or via Modbus
registers.
Password
Three programmable passwords restrict
modification of programmed settings.
Pass 1: Allows use of function keys and
digital inputs
Pass 2: Allows use of function keys, digital
inputs and editing set/reset points
Pass 3: Restricts all programming, function
keys, and digital inputs.
F4 Digital
Input Contacts
50k ohm pull-up to 3.3 VDC.
Connect normally open contacts across F4
to COM.
F4 Digital
Input
Logic Levels
Logic High: 3 to 5 VDC
Logic Low: 0 to 1.25 VDC
Non-Volatile
Memory
All programmed settings are stored in non-
volatile memory for a minimum of ten
years, with or without power.
Power
Options
85-265 VAC 50/60 Hz, 90-265 VDC, 20 W
max or 12/24 VDC
10%, 15 W max
Powered over USB for configuration only.
Fuse
Required external fuse: UL Recognized, 5
A max, slow blow; up to 6 scanners may
share one 5 A fuse
Isolated
Transmitter
Power Supply
Terminals P+ & P- : 24 VDC
10%.
Selectable for 24, 10, or 5 VDC supply
(internal jumper J4). All models transmitter
supply rated @ 25 mA max.
Isolation
4 kV input/output-to-power line. 500 V
input-to-output or output-to-P+ supply
Overvoltage
Category
Installation Overvoltage Category II: Local
level with smaller transient overvoltages
than Installation Overvoltage Category III.
Environmental
T6 Class operating temperature range Ta
= -40 to 60°C
T5 Class operating temperature range Ta
= -40 to 65°C
Max Power
Dissipation
Maximum power dissipation limited to
15.1 W.
Connections
Screw terminals accept 12 to 22 AWG wire
Enclosure
Explosion-proof die cast aluminum with
glass window, corrosion resistant epoxy
coating, color: blue.
NEMA 4X, 7, & 9, IP68.
Default conduit connections: Four ¾" NPT
threaded conduit openings and two ¾"
NPT metal conduit plugs with 12 mm hex
key fitting installed. Additional conduit
opening configurations may be available;
verify quantity and sizes on specific device
labeling during installation.
Mounting
Four slotted flanges for wall mounting or
NPS 1½" to 2½" or DN 40 to 65 mm pipe
mounting. See Mounting Dimensions on
page
82
.
