Cypress OSM-CPI User manual

211122
Reader-Extender
OSMIUM™
OSDP-Legacy Controller Interface
OSM-CPI
Product Manual
Cypress Integration Solutions 35+ Years of Access Control Ingenuity CypressIntegration.com
© 2020 Cypress Computer Systems 1778 Imlay City Road, Lapeer, MI 48446 800-807-2977
Configuration
The OSM-CPI can be set to Peripheral
Device Mode and be configured with
any standard OSDP configuration tool.
Additionally, there are configuration
modes for pairing with a Peripheral
Device and resetting to Factory Default
parameters.
Device I/O
The OSM-CPI has inputs for controlling
the Peripheral Device’s LED and
buzzer. There is also a tamper output
on the OSM-CPI in the event of
communication loss with the Peripheral
Device.
What is OSDP?
The Open Supervised Device Protocol (OSDP™) is an
access control communications standard developed by
the Security Industry Association (SIA) to improve
interoperability among access control and security
products. OSDP v2.1.7 is currently in-process to
become a standard recognized by the IEC international
standards organization, and OSDP is in constant
refinement to retain its industry-leading position.
Why specify or adopt OSDP?
Already in wide use by many leading manufacturers like
Cypress, HID Global, Mercury and others, the Security
Industry Association encourages broad adoption of this
standard and recommends specifying OSDP for any
access control installations that require real security
and/or will be used in government and other higher
security settings. It is particularly valuable for
government applications because OSDP meets federal
access control requirements like PKI for FICAM.
Source: Security Industry Association
https://www.securityindustry.org/industry-standards/
open-supervised-device-protocol
The OSM-CPI is an
OSDP-Wiegand control
panel interface that
connects an OSDP
reader with a Wiegand
panel.

Specifications
Physical
Dimensions
2.34 x 1.40 x 0.50 inches (excluding wires), wires are approx. 10
inches long
Environmen
tal
Temperature Range (Storage)
-55°C to +150°C
Temperature Range (Operating)
-40°C to +80°C
Humidity
95 percent (non-condensing)
Electrical
Input
Unreg Input 6 to 30 Vdc @ 50mATypical (200mA max)
Data I/O
Wiegand Output
Maximum 255 bits
OSDP
Conforms to Open Supervised Device Protocol (OSDP™) v2.2.0
and IEC Committee Draft Version 60839-11-5
Ordering
Information
Part Number: OSM-CPI
UPC: 816684002540
Agency
Approval
CE Certified: Certified to EN 61000-6-3
SIA’s Open Supervised Device Protocol (OSDP)
v2.2.0 communication standard benefits
•Security: OSDP Secure Channel halts Wiegand hacking withAES-128 encryption
•Interoperability: Mix and match devices to help future-proof systems
•Functionality: 2-way communication, access control that withstands the elements,
multi-drop installations, 2 wires instead of 10+
•Communication: With OSDP’s 2-way communication, the panel can query readers
to find out capabilities, without physically reconfiguring devices. The panel is alerted
if the reader does not answer its query.
•Savings: OSDP is scalable. It supports many more devices – and many more types
of devices (such as readers, strike sensors and alarms) – than the Wiegand protocol.
Learn more at OSDP-Connect.com or CypressIntegration.com/OSDP
The OSM-CPI is a dedicated OSDP to legacy Wiegand control panel interface. The unit converts
credential data from an OSDP reader to Wiegand to direct to the control panel, and converts the
controller’s signal I/O to an OSDP message to send back to the reader. Credential data is sent over an
encrypted OSDP connection.
Cypress OSM-CPI - Product Overview and Specifications

Page 3
Table of Contents
Topic
Page
Overview and Specifications
2
Parts list, Cable recommendations, Signals and pinout
3
Physical Dimensions and Mounting Hole Locations
3
Setup and Pre-Installation
5
Indicators and Operating Modes
6-7
Troubleshooting
8
Cypress OSM-CPI - Table of Contents

Page 4
The OSM-CPI has a single 4 position terminal block, and a 10 wire flying lead interface. The signals
of the terminal blocks and flying leads are named according to the diagram below.
Cypress OSM-CPI - Parts, Wiring, Signals and Pinout
Cypress OSM-CPI - Physical Dimensions and Mounting Hole Locations
All dimensions are listed in inches
10.00" 1.96"
1.80"
0.60" 1.40"
ø0.125" x4
1.20"
1.20"

Page 5
Configuration
The OSM-CPI and compatible attached peripheral devices can be configured in various ways by shorting
certain combinations of the flying leads together at power-up.
Pairing
An OSM-CPI and a connected peripheral device can be "paired" together, by shorting the purple Mode
lead to ground before power up. The OSM-CPI will initiate a secure channel session using SCBK_D , then
issue an osdp_KEYSET command with a new random key. From then on, during normal operation, the
OSM-CPI will initiate secure channel sessions using only that key.
PD Mode
An OSM-CPI can be configured to emulate a peripheral device for further configuration, by shorting both
the purple Mode lead and grey Config 2 lead to ground before power up.
Cypress OSM-CPI - Setup and Pre-Installation

Page 6
Cypress OSM-CPI - Indicators and Operating Modes
Communication
When power is first applied, the OSM-CPI will indicate that it is powering up by cycling its diagnostic
LED through the sequence: off, red, blue, green, and off (about about a half-second per color). The
diagnostic LED will then be solid white for about 2.5 seconds, then solid blue again for about a half-
second before polling begins.
After powering up, the OSM-CPI will first send an osdp_POLL command. It will continue to send
osdp_POLL commands at approximately 1.2 Hz until it receives an osdp_ACK reply. The OSM-CPI
will send an osdp_ID command, and will continue to do so at about 1.2 Hz until it receives an
osdp_PDID reply. After the first correct reply has been received, the OSM-CPI will send an
osdp_CAP command, expecting an osdp_PDCAP reply. If the OSM-CPI receives an incorrect reply
or a reply is never received, the unit will restart the connection sequence from the beginning.
At this point, to initiate a secure channel session with the attached PD the OSM-CPI sends the
osdp_CHLNG command, receiving and validating the osdp_CCRYPT reply from the PD, sending the
osdp_SCRYPT command, and finally receiving and validating the osdp_RMAC_I reply. If the reply to
any of these commands is incorrect or never received, the OSM-CPI will restart the connection
sequence from the beginning
After communication initialization, the OSM_CPI will begin sending the osdp_POLL command at
about 8 Hz until either the PD’s reply is not osdp_ACK, or one of the OSM-CPI’s digital inputs
change state.
If either of the OSM-CPI’s LED inputs change state, it will send an osdp_LED command with one of
four payloads depending on the states of the two LED inputs after the change. All configurations
send a permanent LED command to reader 0, LED 0, with the color of the LED set according to the
following table:

Page 7
If the OSM-CPI’s Buzzer input changes from high to low, it will send an osdp_BUZ command with the
following payload: 0x0002010000 , setting the state of the PD ’s reader0’s buzzer to continuous default
tone.
If the OSM-CPI’s Buzzer line changes from low to high, it will send an osdp_BUZ command with the
following payload: 0x0001000000 , setting the state of the PD ’s reader 0’s buzzer to off.
If the OSM-CPI receives an osdp_RAW reply, it will extract and output the reader data from that
message using the wiegand interface.
If the OSM-CPI receives an osdp_KEYPAD reply, it will extract and output the keypad data in 8 bit burst
mode, detailed in the following Keypad Table.
Cypress OSM-CPI - Indicators and Operating Modes
Meaning
Diagnostic LED Behavior
Power-On Sequence
Cycling though various solid colors
~0.5 s / color
ACU Mode, unsuccessfully
attempting to poll PD
One solid color, flashing briefly to
another color ~0.8 s / cycle
ACU Mode, successfully polling
a PD
One solid color, flashing briefly to
another color ~0.1 s / cycle
ACU Mode, unsuccessfully
attempting to initiate
communication with a PD
(possible SCBK mismatch)
One solid color, flashing briefly to
another color with inconsistent
frequency
ACU Mode, poll response
contained reader data
One solid color, flashing briefly to
another color, then briefly to a third
color
PD Mode, having not received a
poll in > 8s
One color, growing gradually
brighter, then growing gradually
dimmer
Keypad Table
LED Behavior Table

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No Communication
•Power: the unit needs to be powered with between 6 and 30 Vdc (12V nominal @ 50mA)
•RS-485 lines are properly connected (check RS-485 polarity)
•Unit is set up properly with corresponding Access Control Panel or Reader
Factory Default
An OSM-CPI connected to a compatible peripheral device can both be restored to a factory default
state, by shorting the purple flying lead to ground, and shorting the green flying lead to the yellow
flying lead before power up. The OSM-CPI will send manufacturer specific commands to the
peripheral device that will cause it to be restored to a factory default state, then restore itself to a
factory default state.
Cypress OSM-CPI - Troubleshooting