Interface Overview - Ideal Power Stabiliti Series Quick Start Manual

Interface Overview

#1 - AC Disconnect
2-Pin Phoenix-style connector
 Pin 1 is relay "in"
 Pin 2 is relay "out"
This low-power relay driver output will open whenever the PCS senses a grid-fault condition.
It is intended to drive an external 24 Vdc relay which in turn drives an external AC
contactor/disconnect, to open the connection between the PCS and the grid. 2.5 A is the
maximum load current.
#2 - E-Stop / Aux 24 V In
4-Pin Phoenix-style connector
 Pin 1 is Ground
 Pin 2 is Emergency Stop
 Pin 3 is Ground
 Pin 4 is Auxiliary 24 V in
For normal PCS operation, the E-Stop input (pin 2) must be connected to ground. If left open or
tied to 24 Vdc, the E-Stop feature is activated and the PCS will cease exporting power and
move to an idle state. For voltage-forming applications, connect a 150 W 24 Vdc power supply
between Ground (pin 3) and Aux 24 V in (pin 4).
This external power supply is required to keep the control board awake when the PCS is black-
started in voltage-forming mode. The power supply also keeps the control board awake when
transitioning between voltage-following and voltage-forming modes.
For applications that support only voltage-following operation (grid-tied), the supply is not
required.
NOTE: For initial Modbus configuration and read/write verification, use of the external supply is
useful, otherwise a 480 Vac grid connection is required to power the Control Board.
#3 - RS485
3-Pin Phoenix-style connector
 Pin 1 is RS485 D0 (also known as A/A', positive half of differential pair)
 Pin 2 is RS485 D1 (also known as B/B', negative half of differential pair)
 Pin 3 is isolated ground (Common, also known as C/C', signal/power)
2-Wire Serial Modbus interface. Factory default: 240 / 19,000 / 8 / even / 2. The media layer
protocol uses 2-wire Modbus RTU. This protocol relies on RS485 differential signaling. The
need for external termination resistors is determined by a number of factors including Modbus
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
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