GAI-Tronics 69257-101 Access Panel Interface (API) - Manual (Page 4)

Pub. 42004-680L2E
69257-101 Access Panel Interface Page: 4 of 7
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Switch and Jumper Settings
Description
Several switch and jumper settings are required for proper operation of the API Card. The following
settings are set during the system commissioning and programming and should not be changed. If replacing
an existing API card for maintenance purposes, be sure to duplicate the switch and jumper setting of the
card being replaced. Refer to Figure 3 for the switch and jumper locations.
The 2xx/3xx Address header (P2) and shorting clip select part of the base input/output address used by the
MCU when accessing the API.
The Board Address rotary switch (SW4) selects part of the base input/output port address used by the MCU
when accessing the API.
The Board Identification rotary switch (SW3) lets the MCU distinguish between multiple APIs installed in
the same card rack. Set SW3 to either “1” or “2”.
The Clock Master/Clock Slave header (P3) and shorting clip configure the API as either the backplane
ST-Bus clock master (source of the clock) or a backplane ST-Bus clock slave (recipient of the clock).
The ST-Bus Stream In rotary switch (SW2) is unused. Set SW2 to “F”.
The ST-Bus Stream Out rotary switch (SW1) is unused. Set SW1 to “F”.
Party Line Isolation headers (P12 and P13) and shorting clips either connect or isolate the API from the
backplane party lines. Pin #1 is toward the front of the API; pin #3 is toward the back of the API. Place the
shorting clip across pin #1 and pin #2 (1-2 position) to isolate the API from the backplane party line. Place
the shorting clip across pin #2 and pin #3 (2-3 position) to connect the API to the backplane party line.
Both P12 and P13 must be in the same position.
N
OTE : The MCU controls which backplane party line, party line #1 or party line #2, the API connects to
when the P12 and P13 shorting clips are in the 2-3 position.
The API-to-access panel data line isolation headers (P5, P7, P8, P9, P11, P14, P15, and P16) and shorting
clips either ground or float a particular API-to-access panel data line. Place the shorting clip across pin #1
and pin #2 (1-2 position) to ground a particular API to access panel data line. Place the shorting clip across
pin #2 and pin #3 (2-3 position) to float a particular API to access panel data line. The first access panel is
associated with the top header (P5); the last, eighth, access panel is associated with the bottom header
(P16); all access panels’ associated headers are located sequentially from top to bottom.