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SafeGuard Controller User Manual
MAN-0115 Rev 0
Figure 3.1
Modbus Communication between SafeGuard and Digital Millennium II
Series Transmitters.
Examples:
M2X-AD/ARD menu settings (See MAN-0076):
Refer to MAN-0076 prior to attempting setup. Power up the unit and enter the transmitter
Modbus menu option, (‘Modbus Setup’).
Select address 001 or the desired address for each unit.
Choose Baud Rate of
09600 bps
.
Select ‘NO’ under parity. Note that the unit will retain its settings if power is removed.
M2B-D DIP Switch settings (See MAN-0082):
1.
Refer to MAN-0082 prior to setup. Select the desired address for the device.
Example: DIP Switch 1 positions 1, 2, 3, 4 “ON”. This corresponds to a Modbus
Address of 1. Refer to MAN-0082.
2.
Set DIP Switch 2 position 1 “OFF” and position 2 “ON”. This corresponds to a
Baud Rate of
9600 bps
.
3.
Set DIP Switch 2 positions 3 and 4 in “OFF”. This allows 8 data bits, no parity
bit, 2 stop bits (also compatible to 1 stop bit)
RS-485 terminating resistors
(remove for short wire paths &
when the SafeGuard Controller is
not end of path)
TB2 terminals 10 & 12 provide
Fused 24VDC power to the
SafeGuard Controller option
boards requiring such power
Aux. Relay piggy
back Board shown
in dotted lines
