12
73ET/74ET/75ET USERS MANUAL EM-7353-0003B Rev.5
• Wire Connection
Use thick wires (max. 2 mm
2
) for the power supply. Always start braiding close to the terminal ends.
Use the sleeve-type ring terminals as shown to the right.
Connection Procedure
1. Confirm that the mains supply is off.
2. Remove the terminal block cover’s attachment screws.
3. Remove the terminal block cover.
4. Remote the screws from the three (3) middle terminals.
5. Align the power wires (braided) and the grounding (FG).
6. Re-insert and tighten the terminal screws. (Torque 0.5 – 0.6 N·m)
7. Reattach the terminal block cover and tighten its screws. (Torque 0.5 – 0.6 N·m)
1.5
I/O MODULES
1.5.1
INPUT DEVICE SELECTIONS
Table 1.5.1 shows a list of usable I/O modules for the 7xET.
Table 1.5.1: I/O modules usable with the 7xET.
1.5.2
CONNECTING I/O MODULES TO THE 7xET
I/O modules directly next to the 7xET are connected via RS-232C. (Use COM1 only for the 74ET and the 75ET.)
Tables 1.5.2a and 1.5.2b show the RS-232C connector pin assignments.
Table 1.5.2a: 73ET pin assignment.
Table 1.5.2b: 74ET and 75ET pin assignment.
max.
6.0 mm
min. ø3.2 mm
1
5
6
9
ABBR.
PIN NO.
EXPLANATION OF FUNCTION
1
Not Used.
BB (RD)
2
Received Data
BA (SD)
3
Transmitted Data
CD (ER)
4
DTE Ready
AB (SG)
5
Signal Common
CF (CD)
6
Received Line Signal Detector
CA (RS)
7
Request to Send
CB (CS)
8
Clear to Send
9
Do Not Connect.
ABBR.
PIN NO.
EXPLANATION OF FUNCTION
CF (CD)
1
Received Line Signal Detector
BB (RD)
2
Received Data
BA (SD)
3
Transmitted Data
CD (ER)
4
DTE Ready
AB (SG)
5
Signal Common
CC (DR)
6
Data Set Ready
CA (RS)
7
Request to Send
CB (CS)
8
Clear to Send
CE (CI)
9
Calling Indicator
MODEL
R1M
R2M
RZMS-U9
R3-NM1
R5-NM1
DC Voltage
R1M-GH2*
1,
*
2
R2M-2G3*
3
R3-SV
R5-SV
Analog
DC Current
R1MS-GH3*
1,
*
3
No
R3-SS/-DS
R5-SS/-DS
Input
Thermocouple
R2M-2H3*
3
RZMS-U9*
1,
*
3
R3-TS
R5-TS
RTD
R1M-J3
No
R3-RS
R5-RS
Potentiometer
No
No
CT
No
No
No
R3-CT
No
PT
No
No
No
R3-PT
No
Contact Input
R1M-A1
No
No
R3-DA
R5-DA
Contact Output
R1M-D1
No
No
R3-DC
R5-DC
(open collector)
Pulse Input (totalizing counter)
R1M-P4
No
No
No
No
R1M-A1C1
*1. Resistor module (model: REM3-250) is required to convert the current signal into voltage.
*2. Trigger contact input (1 point) is available.
*3. Trigger contact input (1 point) and alarm contact output (1 point) are available.