Maple Systems STEPware-100 - Manual (Page 18)

Connecting Your OIT to the Host Controller
The information in this section is supplemental to the information in your OIT
Installation Manual. Please read this section and your OIT Installation Manual
before installing your OIT.
RS-232 (Interactive & Block modes)
Interactive and Block modes support the 3-wire RS-232 configuration with TXD, RXD,
and signal common. The cable requires an overall shield to protect against electrical
noise. Xon and Xoff can be used for communication handshaking.
3-Wire RS-232
Host Controller
OIT Terminal Block
(MAP460D, OIT3600)
OIT Port 1
(OIT3100 and
OIT4100 Series)
OIT Port 1
(all other models)
TXD Pin 9 — RXD Pin 6 — RXD Pin 2 — RXD
RXD Pin 10 — TXD Pin 5 — TXD Pin 3 — TXD
signal ground Pin 8 — return Pin 4 — return Pin 5 — return
RS-422/485 (Interactive & Block modes)
Interactive and Block modes support the 3-wire and 5-wire RS-422/485 configurations.
The 3-wire configuration has both transmit and receive on the same pair of wires plus a
signal common. The 5-wire configuration has differential signal pairs for transmit and
receive plus a signal common. In both configurations the signal pairs must be twisted and
surrounded by an overall shield.
3-Wire RS-422/485
Host Controller
OIT Terminal Block
(MAP460D, OIT3600)
OIT Port 1
(OIT3100 and
OIT4100 Series)
OIT Port 1
(all other models)
TXD+ & RXD+
Pins 4 & 6 —
RXD+ & TXD+
Pins 1 & 8 —
RXD+ & TXD+
Pins 4 & 9 —
RXD+ & TXD+
TXD- & RXD-
Pins 5 & 7 —
RXD- & TXD-
Pins 2 & 7 —
RXD- & TXD-
Pins 1 & 6 —
RXD- & TXD-
signal ground Pin 8 — return Pin 4 — return Pin 5 — return
Getting Started 15
1010-0096, Rev. 04