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Wiring the OSDP Readers
The MPA1C1 Access Control panel only supports OSDP readers.
OSDP (Open Supervised Device Protocol) is a bi-directional
RS485 multi-drop AES128 Encrypted protocol.
The MPA1C1 provides a single OSDP connection for the door
which can have 2 OSDP readers connected (Address ‘01’ = Entry
reader and Address ‘02’ = Exit reader).
The OSDP readers are connected through the connector marked
as OSDP READER.
The MPA1C1 can communicate to external readers connected
with 300m (1,000 ft) of twisted pair, 24 AWG wire at 9600 BAUD.
The OSDP reader bus (TRX+, TRX-, 12V, GND) supplies standard
12V for the readers. The maximum power drawn is 500mA for
the readers.
The maximum recommended length of the OSDP readers wiring
is 50m (164 ft) using Cat5E cable per OSDP reader. The length
is based on 250mA current consumption per reader (2 readers)
and therefore a voltage drop of 2.1V (10VDC at the reader).
Addressing OSDP readers
An OSDP reader address is default (factory) set to '00'.
In this setting the reader will be readdressed to the first avail-
able address (‘01’ for IN reader or ‘02’ for OUT reader).
This readdressing will happen after the reader has been con-
nected and the panel has been powered-up.
No extra setting needs to be done when using only the IN reader
(Entry) configuration. The reader will automatically get address
‘01’ to act like an IN reader. This is an automated process.
For IN and OUT reader use, the readers will need to be con-
nected one-by-one.
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