West Control Solutions Pro-EC44 - Manual (Page 258)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 251
24V Transmitter Power Supply 2-3 Performance
Positions Optional in Plug-in Modules 2 & 3.
Power Rating 1 x 24V nominal (unregulated) excitation for external circuits &
transmitters. Rated at 19 to 28VDC at 20mA. Load 910
Ω minimum.
Isolation: Reinforced safety isolation from inputs and other outputs.
*see Linear output (above) for adjustable 0 to 10V Transmitter Power Supply
CAUTION: Only one Transmit PSU is supported by the instrument. Do not
fit in both positions simultaneously.
Communications
Supported Communication Methods
Plug-in Slot A: RS485 or Ethernet
PC Configuration Socket TTL socket fitted as standard beneath the case.
Requires the optional PC Configuration Lead for use.
USB Port Optional front mounted USB socket. Use with memory sticks only.
PC Configuration Socket
Functions PC software for configuration, data extraction and profile creation.
Type: Proprietary TTL level serial communications.
Connection RS232 via PC Configurator Cable to RJ11 socket under case
Isolation: Not isolated from SSR driver outputs. For bench configuration only.
CAUTION: The configuration lead/socket is not isolated from SSR Driver
outputs. It is not intended for use in live applications.
RS485
Functions Setpoint broadcast master or general communications slave to any
suitable Modbus RTU master device (inc. extraction of recordings,
transfer of configuration & profile files to or from the PC software).
Type: RS485 Asynchronous serial communications module.
Connection Locates in Option Slot A.
Connection via rear terminals 16-18 (refer to wiring diagram).
Protocol: Modbus RTU slave or Modbus RTU setpoint broadcast master.
Slave Address Range: 1 to 255 or setpoint master broadcast mode
Bit rate: 4800, 9600, 19200, 38400, 57600 or 115200 bps.
Bits per character: 10 or 11 (1 start and 1 stop bit, 8 data bits plus 1 optional parity bit).
Parity: None, even or odd (selectable).
Isolation: 240V reinforced safety isolation from all inputs and outputs.