TRANSIT Ultimate – getting started with OSDP


The TRANSIT Ultimate with OSDP Installation Board supports the OSDP protocol. The OSDP Installation Board ( 9229078) includes the PCC485/OSDP converter and will be installed inside the TRANSIT housing . This board implements the OSDP protocol according to the SIA OSDP v2.1.7 standard, including the Secure Channel Protocol.

OSDP installation procedure

  1. Install the OSDP Installation Board.
  2. Connect to RS485.
  3. Setup customer-code(s).
  4. Setup TRANSIT configuration.
    See below for more details.

Install OSDP Interface Board

The TRANSIT Ultimate and OSDP Interface Board (PCC485) must be connected as shown in the figure below. This is already done by Nedap if purchased together. The wiring includes power supply, antenna signal for identification and control for relay output and front cover LED.


Connect RS485

The RS485-OSDP wiring should be connected to the RS485 connections on the OSDP Interface Board or directly to the PCC485. See wiring picture below.

For point-to-point communication enable the termination resistor. PCC485 switch 1 to ON position. See picture below.


For multi-drop communication disable the termination resistor on the PCC485 on all devices except the last device. The termination resistor should be enabled on the last device in a multi-drop communication system. See picture below.


For more details refer to the separate PCC485 installation guide.


Optionally valid customer-codes may be configured directly in the OSDP Interface Board / PCC485. By default any customer code is accepted. Use the OSDPTOOL software to enable the customer-code verification and view and/or edit the valid customer-codes. A maximum of 20 valid customer-codes can be defined.

Setup customer-codes procedure

1. Connect to the OSDP Interface Board / PCC485 using OSDPTOOL.
Make sure to select correct OSDP device address (default 0).


2. Click menu NEDAP, PCC485, Edit customer-codes.


3. Select "Read any" or "Only valid customer-code".
This option may not be shown for PCC485 firmware version before 1.12.

4. The list of valid customer-codes is shown. You may add or delete customer-codes.
A convenient method is to first present a tag to the TRANSIT and next click the ‘Last customer-code’ button. This will show the customer-code from that last tag. Click Yes to add this customer-code.


5. Click OK to save the list of valid customer-codes.

TRANSIT configuration

This chapter describes how to configure the TRANSIT Ultimate reader for OSDP installations.
The relay activation and LED control should both be set to manual mode so that they can be controlled using OSDP commands.

TRANSIT firmware requirements
The OSDP Interface Board / PCC485 requires to use one of the standard TRANSIT firmware versions, since these support the manual LED and relay control function.
• P80 v3.00   (no configuration required, use default settings)
• P81 v3.35
• P82 v3.08
• P83 v3.04
• P84 v3.06
• P85 v3.01
Newer versions are also supported as they will be backwards compatible.

Configuration settings
The relay activation and LED control must both be set to manual mode.
This is best done using the NEDAP P81TEST software. Download this software from our partner portal.

Start NEDAP P81TEST software and connect to the reader using the USB or RS232 interface.

1. Click Options, Digital I/O.
2. Disable automatic relay activation.
3. Disable automatic LED control.
4. Select the LED colors.


OSDP capabilities

The OSDP communication protocol is implemented according to the SIA OSDP v2.1.7 standard, including the secure channel protocol.

The OSDP control panel (CP) can request the reader device capabilities using the OSDP_CAP command. The TRANSIT will respond with the OSDP_PDCAP device capabilities report. Below an overview of the device capabilities.

The outputs can be controlled using the OSDP_OUT command. There are 2 relay outputs. The command accept timed operation (compliance level 3).
Output #0: TRANSIT relay.
Output #1: PCC485 relay.

The TRANSIT Ultimate has an RGB LED that can be controlled using the OSDP_LED command. The command accepts timed operation (compliance level 2). The permanent command is volatile (does not transcend power cycles).
LED #0: UL – Green *
LED #1: NA – Red *
* The LED colors can be selected in TRANSIT configuration. See TRANSIT configuration.

The TRANSIT beeper indicates transponder identification. The signal strength of the identified transponder determines the beeping frequency. When the transponder is near to the reader the range beeper will beep fast. The beeper is enabled with SW2-4 in ON position. The beeper cannot be controlled through OSDP.

Various capabilities

  Function code Compliance
3 Card data format Raw array of bits
8 Check character support CRC16 supported
9 Communication security Yes, AES128 encryption supported
10 Receive buffer size 256

Not supported

  • Input status reporting.
  • Text display.
  • Date/time keeping.
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