Specifications

L2234
L2778
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L5179
Emax
131/161
Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
16.1.5.1. PR021/K unit menu table
Protection Parameter / Function Values Notes
PR021K unit Present
Absent Leave as Absent if there is no PR021/K
Relay no. 1 / 2 / 3 / 4 / 6 / 7 / 8
Signal source function
None
L Prealarm
L Timing
S Timing
L Trip
S Trip
G Trip
I Trip
Any trip
Custom - See par. 16.3.3
Delay 0...100 s step 0,01s - Deliberate delay before activating the
contact
NO/NC NO/NC - Contact normally-open (NO) or normal-
ly-closed (NC)
Latch ON/OFF - With the contact “ON”, once it has been
activated it stays switched.
A specific reset action is needed to
reset it
16.1.5.2. Important note
WARNING: The unit must be connected to the PR122/P or PR123/P by means of an internal busbar with a shiel-
ded, corded two-wire cable (see note A, par. 11.2.2) no more than 15 m long.
The shield must be earthed both on the circuit-breaker side and on the PR021/K side. For the installation and
operation of the PR021/K accessory, refer to the specific user manual.
16.2. SD-Testbus2
SD-TestBus2 is the installation and diagnostic software for ABB SACE products with a Modbus RTU communication. It can be
used during commissioning, or to find faults in an already up and running communication network.
This enables the connection to a PR121/P, PR122/P and PR123/P.
SD-TestBus2 runs an automatic scan on the RS-485 bus, recording all the devices connected and checking their configurations,
and also testing all the possible combinations of addresses, parity and baud rate.
With a simple click on SCAN you can pinpoint the devices that fail to respond, the configuration errors, the wrong addresses and
parity errors, and so on.
After scanning, the software shows warning messages on potential problems or configuration errors, enabling a complete diag-
nosis of the communication network. These functions are not limited to the ABB SACE devices: any apparatus using the Modbus
RTU standard protocol is recorded and tested.
For the ABB SACE circuit-breakers with an electronic release, the software provides a vast range of additional functions, for check-
ing the wiring, setting opening, closing or reset commands, and reading diagnostic information.
This program is so easy to use that it guarantees a trouble-free installation and commissioning of a Modbus communication network.
SD-TestBus2 is distributed free of charge (freeware) and can be downloaded from the BOL site (http://bol.it.abb.com).
Ekip connect, the new diagnostic software for ABB Sace products, will soon be available.