60
Zenith ZBTS T-series 100-1200A, INSTALLATION AND OPERATING INSTRUCTION
1
Automatic Transfer Switch, I/O Contacts Cabling Rating / Remark
Generator start/stop Cable size:
(Internal use only *)
Common, voltage supply
Generator start/stop NO
Generator start/stop NC
Output relay features Cable size:
Common, voltage supply
(Available for customer connections **)
Alarm/Product available
Programmable output
(default; Alarm/Product
available)
Fire Fighting applications Cable size:
(Internal use only)
Only in delayed transition types,
I – O – II or II – O – I
SELV
Transfers to O/OFF position,
locks the logic and signals alarm
Input contact features Cable size:
Do not connect to any
power supply
Common input
(Internal use only)
Programmable input
(default; Emergency stop)
Programmable input
(default; Remote test on
load)
Programmable input
(default; Remote test off
load)
Only in delayed transition,
I – O – II or II – O – I
* See Chapter 7.2.7 Engine/Generator Start Control Connections
** See Chapter 7.2.8 Customer Connections, I/O Signals
+
-
FIRE
24V
1 2 3
G
~
1 COMMON
2 CLOSES TO START
3 OPENS TO START
—
Table 6.2 I/O Contacts; cabling In ATS and Bybass. Available for customer connections is only
"Common, Voltage Supply". All other I/O contacts in switches are for internal use only.
See also the table 6.6, Bypass-Isolation Transfer Switch: I/O contacts, default settings
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