Instruction manual

Bulletin 900-CONV
Interface Controller
9-215
www.ab.com/catalogs Preferred availability cat. nos. are b
bold
.
Publication A117-CA001A-EN-P
External Connections
0
1
2
3
4
5
6
7
8
9
10
11
12
13
External Connections
RS-485 Connection
❄
Input power supply
RS-232C master (personal
computer with 900Builder)
Pin number (for 9-pin
computer connector)
Abbre-
viation
RS-485 slave (e.g.,
Bulletin 900-TC8)
device
1 If RS-485 is selected as the communications method (i.e., pin 9 of the DIP switch is set to OFF), terminals 8 and 9, and terminals 11 and 12 are connected
internally.
 A 100…240 V AC, 24 V AC, or 24 V DC (not polarity sensitive) input power supply is required.
Function
T
erminal
Number Name
Signal
Direction Explanation
For connecting the operating power supply 1 and 4 PWR — 100…240V AC or 24 V AC/DC model
Connection terminals for RS-232C
communications with master device (DIP
switch pin 8: OFF)
3 SG — Connect to signal ground.
5 SD Input Receives data from SD of the master device.
6 RD Output Sends data to RD of the master device.
Used for RS-485 communications with
slave device (DIP switch pin 9: OFF)
8 RDA (–)
Input/
output
SD and RD for RS-485 (cold side)
Terminals 8 and 9 are connected internally when pin 9 of the DIP switch is set to
OFF.
9 SDA (–)
11 RDB (+)
Input/
output
SD and RD for RS-485 (hot side)
Terminals 11 and 12 are connected internally when pin 9 of the DIP switch is set to
OFF.
12 SDB (+)
Note: Terminals 2 and 10 are not used.
Connection to an RS-232C Master Device
Set the same communications conditions (baud rate, stop bits, data length, and parity) for the master device, the Interface Converter, and
slave devices.
‡§
Computer with
900 Builder Lite or
900 Builder Software
or
Unit 1
Unit X
Devices connected via
RS-485 (example)
‡ With RS-485 communications, connect a terminating resistance (120Ω, 1/2 W recommended) to both ends of the communications link/network.
§ The Bulletin 900-TCx communications number must be set.
♣ A pre-fabricated 3 m RS-232 cable with a 9-pin female D-shell connector on one end and three flying leads at the other is available fr
om Allen-Bradley (Cat. No.
900-CP1X).
® RS-485 allows connecting 32 devices.
 Use a commercially available USB cable
 To use the USB mode requires the download of "free" software into your PC. This software can be found at: http://ab.rockwellautomation.com/Sensors-
Switches/T
emperature-Sensors/900Builder-Lite-Temperature-Controller-Software
Terminal Specifications
Make sure to check the input and output specifications for the signal pins of connected devices before connecting the terminals.