Installation guidelines
29
6.3. Connecting operating device
Connection of OD to the card collector is performed with the use of two
contact sets: "Let Go" and "Pass Ok-GND". Contacts location is shown in
Fig. 14
6.3.1. "Let Go" contact set
NC, NO, and COMM contacts. Relay output operating on a "dry contact"
principle, which closes / opens, transmitting passage authorizing signal to
OD. NC and COMM - normally closed connection, NO and COMM-
normally open connection.
6.3.2. "Pass Ok-GND" contact set
Pass Ok and GND contacts. Pulse input that receives a signal from OD,
confirming that the passage was performed. The operating principle is
based on normally open contacts. Passage is detected by a contact closure
for at least 200 ms.
When authorized card is presented the card collector transmits a signal
(see. article 6.3.1) and unlocks the OD for 5 seconds. During this time
interval other cards are not accepted. When a signal (a closing between
Pass Ok and GND), confirming the passage, is received, the card collector
switches into standby mode and can collect the next card. For these
reasons, the connection of this contact set is essential to the system
capacity.
