Default Jumper Settings; Jumpers - Main Board - Honeywell Mini-AT User Manual

Main Board Jumpers
The Mini-AT has several features and functions that are controlled by installing jumpers on header
pins. Table 9 lists all main board jumpers with their factory default settings.
Jumper
Name Configuration (Default)
JB24
JB29
JB30
JB31
JB32
JB900
Mini-AT User Guide
Jumper
2 4 6 8 10
1 3 5 7 9
1 2 3 4 5 6 7
2 4 6 8 10 12
1 3 5 7 9 11
1 2 3
1 2
1 2 3
Table 9

Default Jumper Settings

Default
Purpose
1 2; LOADER not executed after reset,
3 4; Defaults not loaded after unconfigured
5-6; Flash Upgrades permitted
7-8; Serial access limited by the selection
at items 139, 126 and 272
9 10; Prevent setting of Event Log Lock
1-2 (not 2-3) and 5-6 (not 6-7)
Sets pulse width of KYa and KYb to
62.5 milliseconds. (Other pulse widths can be
achieved by substituting shunt resistors)
1-3-5 and 2-4-6; Configures TB1 for
2 Form-A pulse channels, i.e., KYa and KYb.
Note: 1-3-5-7-9-11 and 2-4-6-8-10-12;
configures TB1 for a single Form-C channel
1-2; Selects input signal to pulse circuits as
Form-A
Note: 2-3; Selects input as Form-C
1 2; Current limiting resistor to input switch
board is not bypassed.
2-3; Selects serial data for modem operation
at TB2
Note:1-2; Selects Aux modem operation (J20)
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