Lenel m3000, Installation Manual, Page: 59 / 118

M3000 Installation Guide
59
2SRP Board
1.
Follow the installation specifications for the device. Mount the device according to the
manufacturer’s specifications. The alarm device (door contact) should have a dry contact which
can have a Normally Open or Normally Closed type switch. A Normally Closed contact is in its
normal or resting position when it is closed. For example, the contact is closed when the door is
closed. The opposite is true for a Normally Open contact. In this case, the contact is open when
the door is closed.
2.
Select the appropriate digital input for each alarm input device.
3.
Ground the shields of the cable at the M3000 enclosure grounding studs. Insulate the shield (with
tape or shrink tubing) at the DI device end to avoid electrical noise.
4.
Install two (2) end-of-line resistors. Install each resistor as close to the door status contact as
possible.
5.
We recommend the standard 1,000 (1K) ohm, 1/4 watt, 5% tolerance, high-quality end-of-line
resistors. If different resistor values are required, refer to
Appendix B: Termination Resistance
Options .
Refer to figure Wiring 2SRP Door Alarm Contact and Exit Request on page 60 for the location of
the resistors.
Refer to table Supervised DI End-of-line Resistors on page 51 for the appropriate switch settings.
6.
Wire the supervised door DI between pin 8 (Door DI) and pin 9 (Door DI Return). Wire the
supervised exit DI between pin 5 (Exit DI) and pin 10 (Exit DI Return). The contact can be
Normally Open or Normally Closed.
• WARNING! •
The supervision capability will be impaired if the resistors are not wired
immediately adjacent to the door status contact.
7.
Insulate resistors with tape or heat shrink tubing.
8.
Document how you wired the alarm input devices. Future expansion of the system and its
maintenance depend upon accurate documentation.