SPA-ZC21 ABB bus connection module
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Product’s description
The SPA‑ZC 21 module serves as an interface between a SPACOM device (or other substation‑secondary equipment) and the fibre‑optic SPA bus. It converts incoming optical signals from the SPA bus into
electrical signals (RS‑485 or TTL/SPA +5 V) for the host device, and conversely converts the host device’s electrical output to optical for the bus.It is designed to plug into the rear plate
of the host device (typically via a 9‑pin D‑type connector) and therefore supports seamless integration into existing substation secondary
equipment with such interfaces.It offers high immunity to electrical and electromagnetic
interference, important for substation environments.
FAQ
Q1: What exactly does the SPA‑ZC 21 module do?
A1: It acts as an interface module between a host substation secondary device (with a 9‑pin D‑type connector, RS‑485/TTL signalling) and the fibre‑optic SPA bus. It convert
s electrical signalsfrom the device into optical signals for the bus and vice‑versa.
Q2: What signalling does it support on the host side?
A2: On the host side it supports RS‑485 or TTL/SPA (+5 V) signalling. DIP switches on the module allow selection between SPA‑mode or RS‑485‑mode.
A3: Yes. The SPA‑ZC 21 module can be used in both master and slave mode, depending on how you configure
it (via DIP switches) and how it is used in your system.
Q4: What type of fibre‑optic cables/transceivers does it support?
A4: The module supports versions with plastic‑core fibre, glass fibre, or a combination thereof (transmitter/receiver pairs). For example
model designations like “BB” (Plastic/Plastic), “BM” (Plastic/Glass),
“MB”, “MM” etc are referenced.
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