Omron EJ1G Datasheet page 12

HFU channels Groups
1 1
2
3
4 Not usable
5 2
6
7
8 Not usable
9 3
10
11
12 Not usable
13 4
14
15
16 Not usable
The HFU can control up to 64 channels, but when the maximum
number of enabled channels is a number other than 4, 8, 16, or 32
channels, non-usable channels result as shown in this example. This
limits the number of controllable channels and connectable Units.
The example used here results in the following group division and heater connection.
0 1 2
TC2 TC2 TC2 TC2 TC2 TC2
HFU
CH1 CH3
CH2 CH5 CH7 CH10 CH13 CH15
Heater block 1 Heater block 2
CH13
CH1 CH2 CH3 CH5 CH6 CH7
Note: The connections for heater blocks 2 and 3 are omitted above.
■ Gradient Temperature Control
Operations
The HFU handles all of the operations for gradient temperature
control.
The temperature input is received by the Basic Units (TC2 or TC4),
calculated by the HFU, and then output from the Basic Units (TC2 or
TC4) as manipulated variables.
General Flow of Gradient Operations
Sensor input
HFU
TC2 TC2 TC2 TC2
Output manipulated variables
12
Modular Temperature Controller for Gradient Temperature Control
3 4 5 6
CH6 CH9 CH11 CH14 EDU
Heater block 3
CH14 CH15
CH9 CH10 CH11
TC2 TC2 EDU
■ Arrangement of Gradient
Temperature Control Sensors
Arrange the sensors sequentially to maximize the control
performance within the gradient temperature control groups.
Examples for linear arrangement of
heaters
Good example
1CH 2CH 3CH 4CH 5CH
Examples for planar arrangement of
heaters
Good example
7CH 8CH 9CH
6CH 1CH 2CH
5CH 4CH 3CH
EJ1G
Bad example
1CH 3CH 5CH 4CH 2CH
Bad example
3CH 5CH 2CH
7CH 9CH 8CH
1CH 4CH 6CH