Data sheet, 4nsa – Procom 4NSA User Manual

Page 3

Data Sheet

4NSA

LF Interface Module, 4-Wire

The mode of operation is set in the configuration software ICS:

- Call station operation mode: One call station is expected as subscriber
- Master operation mode:

As counterpart a 4NSA as slave is expected

- Slave operation mode:

As counterpart a 4NSA as master is

expected

- No modem operation mode:

The 4NSA only transmits LF signals

A slide-in attachment on the 4NSA as well as a special call station are necessary in
order to realize the LF monitoring function.
For this an audio signal is generated cyclically over the microphone of the call station
and sent to the 4NSA. If the transmission of the LF signal fails, then an error
message is generated.
This mode is activated by ticking the option in ICS.

The Symbols on the Front Plate and their Meaning:

The System Blinker
Addressing from processor taking place

I/O Input/Output

BUS output works as push-push operation with the system blinker
BUS input works as push-pull operation with the system blinker

Sending/Receiving

(depending on the set)

LED lit:

4NSA sending to subscriber

LED blinking:

4NSA receiving from subscriber

LED blinking slowly: modem connection disrupted

Fuse

(depending on set)

LED off: fuse has been triggered

Date:

13.03.2009 Page:

3/4 Author:

Document-No.:

DB_4NSA_ 2300_01