Eaton Power Xpert Release PXR 20 - Page 27

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4. Complementary features
POWER XPERT® RELEASE TRIP UNIT FOR MAGNUM PXR CIRCUIT BREAKERS MN013015EN January 2022 www.eaton.com
Table 10. Wiring terminals.
Feature Terminal Name Notes Alt. name
Auxiliary control power C14 +24 V Connect a high quality, isolated source, 24 Vdc 0.5 A is required. Eaton PSG family recommended. See Section
4.5 - Auxiliary control power.
C15 0 V
Zone selective
interlocking (ZSI)
C19 ZI Connect to other ZSI enabled breakers in the system. Maximum length of 25 meters (75 feet)
using AWG #22 wire. See Section 3.9 - Zone selective interlocking (ZSI).
ZIN
C20 ZC ZCOM
C21 ZO ZOUT
Maintenance mode
enable input
C18 MM Connect 0 V (C15) to this terminal through an external dry contact to enable ARMS. This is a low-voltage signal.
Use a high-quality gold contact, maximum length 3 meters (15 feet). See Section 3.8 - Maintenance mode.
Neutral voltage
reference
C49 VN Connect to the neutral in a 3-pole breaker, no connection in a 4-pole breaker.
External neutral
current sensor for
overcurrent or residual
ground
C16 N Connect to the external neutral current sensor, jumper if not needed and in a 4-pole breaker.
See Section - 4.1 Neutral sensors.
White (X1)
C17 N• Grey (X2)
Ground fault sensor for
source ground or zero
sequence
C7 G1 Connect to the source ground or zero sequence sensor when used. See Section 3.6.2 - Source ground and zero
sequence.
C8 G2
Configurable relays C10 RY1 Normally open (NO) contacts rated 6 A at 250 Vac/30 Vdc. Contact closes per the associated function. RYC
(C13) is the common connection. Requires control power to actuate. See Section 4.5 - Auxiliary control power.
C11 RY2
C12 RY3
C13 RYC
Modbus RTU C22 MBA Connect other Modbus RTU devices in a daisy-chain to these terminals. Typical alternate
naming is listed to the right. Recommended cable is twisted-pair, foil shielded w/drain, 120
ohm impedance.
A / D0 / D-
C23 MBB B / D1 / D+
C24 MBG Ground
Communication
adapter module (CAM)
C29 CM1 Connect to the selected CAM module referring to CAM instruction leaflets for detail. CAM
signal names are listed to the right. See Section 4.4 - Communications adapter modules
(CAMs).
RX+/CMM1
C30 CM2 RX-/CMM2
C27 CM3 TX+/CMM3
C28 CM4 TX-/CMM4
C15 0 V 0 V/C/AGND