SBC PCD2.M5 Series - Tty;Current Loop

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Denitionsofserialinterfaces
Annex
A-4
A
A.2.3 TTY/currentloop
SignalstoTTY/currentloop
Terminal 1 TS Transmitter Source
Sender
Terminal 3 TA Transmitter Anode
Terminal 6 TC Transmitter Cathode
Terminal 8 TG Transmitter Ground
Terminal 2 RS Receiver Source
Recipient
Terminal 4 RA Receiver Anode
Terminal 7 RC Receiver Cathode
Terminal 9 RG Receiver Ground
Signal type Set-point Nominal value
PowerforlogicL(space) -20 mA to + 2 mA 0 mA
PowerforlogicH(mark) +12 mA to +24 mA +20 mA
Neutral voltage to TS, RS +16 V to +24 V +24 V
Short circuit power on TS, RS +18 mA to +29.6 mA +23.2 mA
The idle state of the data signals = "mark"
By wiring to the cable connector, the user selects either an "active" or "passive" cir-
cuit.
The max. transmission rate for TTY/current loops at 20 mA is 9600 bps.