54
4400 Series Installation and Operation Manual – 64527-008
9.7 Control Wiring
TB3 provides terminals for connecting the UPS to external control functions. The functions of the terminal pairs are given
below.
TABLE 9.6: TB3 TERMINAL FUNCTIONS
TB3
Terminals
Status*
,
**
(NO - Normally Open)
(NC - Normally Closed)
Function
1 & 2 NO* Bypass Status - Bypass / Gnd (Closed when UPS is in Bypass mode)
3 & 4 NO* EPO Status (Closed when UPS is shut down)
5 & 6 NO* Remote EPO (Closing external switch will shut down the UPS)
7 & 8 Default: NC*
(Congurable NO or NC
from Display)
Battery Breaker Open/Battery Overheat Sense (Batt Cab CB Aux
Switch)
9 & 10 NO** P24 A3 / Remote Run (Closing user-supplied external switch will
Transfer UPS from Bypass to Online)
11 & 12 NO** P24 A3 / Remote Stop (Closing user-supplied external switch will
transfer the UPS from Online to Bypass)
13 & 14 NO** P24 / Charge Stop (Closing user-supplied external switch will stop the
UPS Battery Charger circuit)
15 & 16 – Shunt Trip (Places Battery Breaker shunt trip coil in parallel with UPS
MCCB, so EPO will open both UPS and BC circuit breakers simulta-
neously)
17 & 18 NO (Not Assigned)
19 & 20 NO (Not Assigned)
* Dry contacts.
** Controller board is programmed to accept momentary signals only. Signal duration of 20 seconds or greater will trigger
the warning LBABNL (Local Button Abnormal)
TABLE 9.7: TB3 TERMINAL FASTENING TORQUE
TB3 Terminals Wire Size Fastener Torque
1 thru 20 14 – 16 AWG 8 in-lb (0.9 N∙m)
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