CTI Products NCB/EM with External PSTN Modem - Manual (Page 46)

CTI Products, Inc. NCB-EM User Guide
Appendix C. Connector Details 40
3 Pin Terminal Strip style:
Mating Connector: Weidmuller 128186
Pin Function
1 Network
2 Network
3 Shield (RS-485 only)
SMX Transceiver units:
SMX network connections are described in the documentation with the SMX
transceiver.
PORT 1 and PORT 2 Connectors
Connector type: Standard DE9 male
Data Format: 8 data bits, 1 stop bit, no parity
Data Characteristics: A series of bytes entering the “PORT 1” or “PORT 2
connecters must not have gaps between bytes greater than 500ms.
Handshaking: Activating the DSR input signal informs the NCB unit that the channel is
active. If the channel does not directly support DSR, it must be strapped
back to the (always active) DTR output signal.
Flow Control: CTS/RTS flow control can be used to pace the transmission of individual
bytes between the NCB and a connected device. Sensing of CTS by the
NCB can be enabled/disabled with the Option B switches. (See “S
TEP 2.
S WITCH S ETUP
”, in section “2.
S ETUP AND O PERATION
”.)
Miscellaneous: Pinout as DTE, arranged for direct connection to 25 pin connector using
standard 9 pin to 25 pin cable.
All signals must be connected for proper operation.
NCB Pin Function Direction Modem Pin
1 DCD Channel  NCB 8
2 RXD Channel  NCB 3
3 TXD NCB  Channel 2
4 DTR NCB  Channel 20
5 ground 7
6 DSR Channel  NCB 6
7 RTS NCB  Channel 4
8 CTS Channel  NCB 5
9 RI Channel  NCB 22
NETWORK
1 2 3
C A - 8 0 0 8 5 - 1 0 0
NETWORK
2 1
PORT 1
1 2 3 4
6 7 8 9
5