Appendix H: Remote Shutdown - HindlePower AT30 SERIES Operating And Service Instructions

BACKGROUND
. .! WARNING
installations require the charging process to stop when these gases are detected. The AT30
features a remote shutdown capability, allowing the charging function to be temporarily halted,
using an external user-controlled non-powered "dry" contact.
INSTALLATION
Locally shut down the AT30 by manually opening both front panel circuit breakers
(CB1/CB2). If possible, lock out all external power to the charger. Open the front panel door
and identify the square Main Control PC Board (A1) mounted to the inside surface of the
instrument panel. Along the bottom edge of the board are a number of user contacts. Locate
the 2-position compression screw terminal block (TB18) at the center of the board.
The terminals for remote shutdown
connector are labeled "AUXILIARY I/O",
and numbered "2" and "3", with position
"1" not loaded. The terminal block
features compression screw connections, accepting #22-14 AWG signal wire.
A user-supplied non-powered "dry" contact is required to activate the AT30 remote
shutdown feature. Feed user-supplied shutdown wiring into the AT30, and route it up to the
Main Control PC Board (A1). Strip 0.25in / 6.4mm of insulation from the incoming signal
wiring, and insert into terminal block (TB18-2 & TB18-3). Polarity of user shutdown wiring is
not important. Tighten the compression screws, and secure the new wiring to the existing signal
harness. Return any safety shields and close the front panel door.
Restart the AT30 using the procedure in Section 2.1. After the start-up sequence,
confirm the AT30 returns to normal operating conditions. No alarm indicator LEDs should be
lit, and no front panel error codes should be apparent on the 4-digit meter display.
FUNCTION
Test (or activate) the remote shutdown feature by connecting (or closing) the Auxiliary
I/O contacts (TB18-2 and TB18-3). The front panel display should stay lit. Both front panel
circuit breakers (CB1/CB2) should stay closed. The 4-digit front panel display should indicate
error code E 16 within seconds. The AT30 has been successfully shut down.
...! CAUTION...
AT30. External ac power to the input terminals (TB1-L1/L2) are still live, and the ac
input circuit breaker (CB1) is closed. Likewise, dc bus voltage is still present at the
output terminals (TB1+/-), and the dc output circuit breaker (CB2) is closed.
Initiating a remote shutdown will also cause the AT30 summary (common) alarm relay
to change state. A discrete alarm contact for remote shutdown is not supplied. However, if the
optional AT Series Communications Module is supplied with the charger, the remote shutdown
error code (E 16) will be transmitted remotely via Modbus or DNP3.
RESTART
Restart the AT30 by opening Auxiliary I/O contacts (TB18-2 and TB18-3). Error code
E 16 should disappear from the 4-digit front panel display. After a few seconds, the AT30
should return to normal operation, and no alarms should be present. The front panel display
should alternate between dc output voltage (Vdc) and dc output current (Adc). The AT30 has
been successfully restarted.
REMOTE SHUTDOWN
.
Charging stationary batteries can produce explosive gases! Some
During remote shutdowns, dangerous voltages still exist inside the
APPENDIX H
95