tSYS (or test SYS) are required only to test the Masternode network.
tSYS are Testnet Syscoin tokens with zero value.

From the Syscoin Slack Channel:

Join the Syscoin Slack Channel: join.syscoin.org
Copy & paste the receiving address generated above into our Syscoin #beta-testing slack channel to receive your collateral tSYS to use for masternodes.
Someone in that channel will send tSYS to that address. The sender will also give you the Transaction ID to use for your masternode configuration below.
If you do not get a TXID please kindly request it from the sender of the coins as it is required.

- OR -

Use the tSYS faucet: