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PF2100

Modbus Card Instruction Manual v1.1

©2011 Profire Energy Inc

Jan 5, 2012

Page 4

Modbus Card Specifications

The Modbus Card has the following specifications:

Spec

Value

Operating Temperature:

-

40 C to +60 C

RS

-

485

Signaling

:

Min Differential Receiver Voltage

400

mV

(A to B

)

Absolute

Max Receiver Voltage

15 V (A

to GND,

B

to GND)

Typical Differential

Driver

Voltage

5

V

(Y to Z

)

Maximum Driver Short Circuit Current

+/

-

250

mA

Termination

None or 120 Ohms (user selectable)

Receiver Input Impedance

96

kOhms

Modbus Protocol:

Protocol

Modbus RTU

Baud

R

ate

9600 or 19200 bps (user selectable)

Parity

None

Tx

-

to

-

Rx Delay

2 or 25 ms (user selectable)

Terminal Block:

Maximum Wire Gauge

16 AWG

Physical Dimensions (including components):

Width

59.1 mm

Width (including pluggable header)

68.1 mm

Length

85.7 mm

Height

25.5 mm

Height (including standoff threads)

30.0 mm

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