Setting Mac Board Switches - Allen-Bradley 1779-KFMR User Manual

Chapter 4
Installing the 1779 KFM Interface

Setting MAC Board Switches

4 8
Data Transmission Rate
Set the data transmission rate switches to select the data transmission rate
on the RS-422/499 link to the host device.
Set These
Switches 9.6K
3 OFF
2 ON
1 ON
The MAC board has two switches. Set Switch 1 to the UP position.
Switch 2 is not used and can be in either position. To set the switch,
follow these steps:
1. With the removable frame in the switch-setting position, disconnect
the green equipment-grounding conductor from between the
stationary frame and the ground post on the removable frame
(Figure 4.5).
Figure 4.5
Green Conductor Connecting the Stationary Frame to the Ground Post on the Removable
Frame
115V AC/230V AC
ED COMPUTER INTERFACE
To Select This Data Transmission Rate (in Bits/s)
19.2K 38.4K
ON OFF
OFF OFF
ON ON
INTERNALLY
SWITCH
SELECTABLE
L1
L2/N
GND
57.6K 76.8K 115.2K
ON OFF ON
ON ON OFF
OFF OFF OFF
Green Grounding
Conductor