8 Hardware Connections
8 Hardware Connections
1. Connect an Ethernet cable to the LAN1 or LAN2 port on the ACC.
2. Connect the local devices to each of the 6 FLN ports on the ACC.
Up to 16 devices can be connected to each FLN port, for a total of 96 devices per
ACC. See "FLN Connectivity Options" on page 17.
NOTICE
l Maximal length of an ACC FLN Bus (RS485) is 1200 m.
l No “star” or “branch” wiring to the FLN-devices. The devices have to be wired in series (only
one line) according to the RS485 electrical specifications.
l Ensure that the polarity of each connection is correct.
l The cable shield of t he FLN should be connected directly to the FLN-connector (Terminal
S) of the ACC. Connect at this end ONLY!
3. Connect an alarm device (if required) to the ALARM OUT ports on the ACC.
4. Connect a tamper switch (if required) to the TAMPER ports on the ACC.
5. Connect the power fail signal from a PSU to the POWER FAIL ports of the ACC.
Note: A short circuit between the two power fail input pins indicates a
power failure.
6. Ensure that the ACC is correctly grounded, by connecting the ground terminal on
the ACC's power port to the building earth ground.
7. Check all connections thoroughly.
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Siemens AB 2014-03-12
Security Products