Distech Controls Security EC-BOS-602AX Hardware Installation Manual page 12

Digital Input
Digital Input
The Remote IO Security has two (2) digital inputs, located on a 3-position connector next to the earth grounding
lug (see Figure 7). Under the connector, terminals are labeled DI1, GND, DI2. This means when wiring, as many
as two conductors can be landed to the common GND terminal.
Each digital input can monitor dry contacts, either normally-open (N.O.) or normally-closed (N.C.). Both inputs
are unsupervised—no end-of-line resistors are required.
Figure 7 Digital input wiring example to Remote IO Security module.
3-position
connector for
Digital Inputs
Enclosure for
Remote IO
Security
Tamper
Switch NC
or NO
The software application in the EC-BOS
Note
connections:
DI1 — Tamper switch (typically for enclosure door)
•
DI2 — Battery status bad (if contacts available)
•
Depending on the installation, not all DIs may require connection. In particular, input DI1 is wired only if
no other module (or EC-BOS
switch—only one is needed per enclosure. Input DI2 is typically wired only if the Remote IO Security
module is in a remote assembly of modules, where a
and it has "battery bad" contacts. Here again, only one such input is needed to be wired per enclosure.
Digital Input Wiring Notes
The device monitored by a digital input should have dry contacts (voltage free) as either a normally-open
•
or normally-closed type switch. Mount the device per the vendor's instructions.
Use shielded, twisted-pair cabling to connect the device to the Remote IO Security. Maximum cable
•
distance is 2000 feet (610m).
• Run this cabling from the device to the Remote IO Security, bringing it through an appropriate knockout
in the enclosure (if applicable). Allow sufficient slack cable for servicing.
• At the device, connect its contacts to the cable pair, and insulate the shield wire by taping it back or using
shrink tubing.
At the Remote IO Security, ground shield wires to the grounding point at the enclosure. See
•
page 7.
Connect the two conductors from the device's contacts to the appropriate DIn terminal and common GND
•
terminal. Note that the software expects DIs to monitor specific items—see previous
12
Figure 7
Battery Status Bad
Contacts (NC or NO)
see following Note.
AX
Security is pre-configured to support the following
AX
Security) has the same input wired to the enclosure door tamper
Remote IO Security Module Hardware Installation Guide
Updated: January 2014
shows example wiring to digital inputs.
third-party battery-backed power supply
Part Number 05DI-HISCRIO-22
Security I/O Wiring
is used,
Figure 3 on
Note on page 12.