Assembly and Operation Manual
10
а
)
b)
Figure 4 – Control elements of an external device:
a
– a normally open relay contact;
b
– a circuit with open-collector output.
6.4.3 The relays “PASS A” (contacts “PASS A” and “Common”), “PASS B”
(contacts “PASS B” and “Common”), “Ready” (contacts “Ready” and
“Common”), “Detector” (contacts “Det Out” and “Common”) and “Alarm”
(contacts “Alarm 1” and “Alarm 2”) have normally open contacts. The
“Common” contact, common contact for the relays, at that, is not con-
nected to the negative terminal of the turnstile power supply. In the ini-
tial (inactive) state, when the power is on, the relay contacts “PASS A”,
“PASS B”, “Ready” and “Detector” are closed (voltage is supplied to the
relay coil) and the “Alarm” relay contacts are open (voltage is not sup-
plied to the relay coil). Opening/closing of PASS A, PASS B, Ready,
Summary of Contents for Turnichetul TB 1
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