ABB SPNIS21 Network Interface Module
Description:
The SPNIS21 network interface module is the front end of every Cnet communication interface. It is the intelligent link between nodes and the Cnet, allowing any node on the network to communicate with any other node. It works in conjunction with the SPNPM22 module.

SPNIS21 module is a single printed circuit board that occupies one slot in a MMU. The circuit board contains microprocessor based communication circuitry that enables it to interface with the IET800 module over a dedicated I/O expander bus. 

Two latching screws on the faceplate secure the SPNIS21 module to the MMU. There are 16 LEDs on the faceplate that display error codes and event/error counts and one status LED that indicates the operation status of the module. A stop/reset button is also provided.

SPNIS21 module has three card edge connectors for external signals and power (P1, P2, and P3). Connector P1 connects to common and +5 VDC power. Connector P2 connects the NIS21 module to the I/O expander bus to communicate with the IET800 module.

The NIS21 module connects to its Cnet communication network through a cable attached between its P3 connector and an NTCL01 termination unit. Communication between nodes is through coaxial or twinaxial cables that connect the termination units of each node.

Specifications:
Power requirements: +5 VDC at 825 mA; 4.1 W typical
                                 +5 VDC at 1.1 A; 5.5 W maximum
System capability: 62,500 nodes in the system; 250 nodes on a loop. Any combination of
Cnet-to-Cnet, Cnet-to-HCU, and Cnet-to-computer interfaces
Communication rates: 10 Mbaud or 2 Mbaud

Warranty: 12 months.
Lead time: 1-2 working days.
Terms of payment:T/T and Western Union.
Courier partners: DHL, UPS, TNT, FedEx and EMS.
Technical specification, manuals and data sheets

Related items:
SPNPM2
SPIET800
SPBRC410
SPASI23
SPNIS21