200CR Back Panel
Warning: Make sure power to all wires is turned off
before proceeding with the power installation. High
voltage may be present on the input power wires
and relay wires.
Terminal Block TB1
200CR models 6220 and 6222 have 2 relays
200CR model 6224 has 4 relays
The wiring sequence is shown in the table below.
Relays 3 and 4 are solid state, for AC only. Refer to
Manual Chapter 2.
TB1
Label
Input Power & Relay
Function
L
N
115V/230VAC Line
115V/230VAC Neutral
Earth Ground
NC1
C1
NO1
Relay 1: Normally Closed
Relay 1: Common
Relay 1: Normally Open
NC2
C2
NO2
Relay 2: Normally Closed
Relay 2: Common
Relay 2: Normally Open
C3
NO3
Relay 3: Common
Relay 3: Normally Open
C4
NO4
Relay 4: Common
Relay 4: Normally Open
AC Power Voltage and Frequency
To change the power voltage and frequency from factory
settings refer to Manual Chapters 2 and 4 respectively.
Output Connections
Connections for all outputs are made to terminal block
TB2. The serial port can be configured as an RS-232
port or an RS-422 port. Analog outputs, if included, are
powered. Do not connecto circuits that provide external
power.
Output Connections continued
TB2
Label
RS232
Function
RS422
Function
RXD-
Receive Data
Receive Data -
RXD+
Not Used
Receive Data +
TXD-
Transmit Data
Transmit Data -
TXD+
Not Used
Transmit Data +
GND Ground*
Not
Used
AO2-
AO2+
Analog Output 2 -
Analog Output 2 +
AO1-
AO1+
Analog Output 1 -
Analog Output 1 +
*For RS232 only.
CAUTION: Do not connect analog output wiring
shields to adjacent GND terminal. Connect them to
AC-power earth ground terminal only.
Sensor Connections
Wire sensor patch cord leads as shown below.
Warning: Miswiring patch cords may damage
sensors. Blue wire #7 is not used. Leave clear
shrink tube in place over it.
TB3
Label
Wire
Color
Sensor
Connection
GND(6)
SIG5(5)
SIG4(4)
SIG3(3)
SIG2(2)
SIG1(1)
BLACK
RED
GREEN
WHITE
CLEAR
WHT/BLUE
Channel B Sensor
Connections
GND(6)
SIG5(5)
SIG4(4)
SIG3(3)
SIG2(2)
SIG1(1)
BLACK
RED
GREEN
WHITE
CLEAR
WHT/BLUE
Channel A Sensor
Connections
Mettler-Toledo Thornton, Inc.
Toll-Free: 800-510-PURE
36 Middlesex Turnpike
Fax: 781-271-0214
Bedford, MA 01730
(781)
301-8600
www.thorntoninc.com
www.thorntoninc.com
www.thorntoninc.com
www.thorntoninc.com
OM84304
Rev.
E
08/03