7
Model TA502A
A2 - C1
A2 - 1
A2 - 2
A2 - 3
A2 - 4
A2 - C2
A2 - OC
CT
UA -OC
A0+
A0-
LA1
FUA-OC/+24V
CAL-OC/COM
+24Vout
LA2
F - OC
F - 2
F - 1
F - C
A1 - OC
A1 - C2
A1 - 4
A1 - 3
A1 - 2
A1 - 1
A1 - C1
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
z
d
SIG IN
COM
+24Vout
COM
SIG IN
2.3.1 Rear Terminal Designations
For the rear terminal designations refer to Figure 13 below:
Figure 13: Rear Terminal Designations
The terminal designations for the
A2
alarm outputs are:
Label
Term
Description
A2-C1
2d
Relay Common (1 & 2)
A2-1
4d
Relay Contact
A2-2 6d Relay
Contact
A2-3
8d
Relay Contact
A2-4 10d Relay
Contact
A2-C2
12d
Relay Common (3 & 4)
A2-OC 14d Open
Collector
(OC)
LA2
24z
OC Logic for A2 LED
Table 1: A2 Alarm
The A2 alarm outputs are DPDT (Double Pole Double Throw) relay contacts, one open
collector output (A2-OC) that follows the logic of the relays and one open collector output
(LA2) that follows the blinking pattern of the front panel LED. The A2-C1 designation is
common for A2-1 & A2-2. The A2-C2 designation is common for A2-3 & A2-4. The
normally open (NO) and normally closed (NC) contacts depend on a user selectable
option (see Section 4.0).
The following table refers to the proper open and closed A2 alarm relay contacts while
the unit is powered:
