Toa SX-2000 Series Installation - Manual (Page 124)

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4.4.3. SX-2000AO and SX-2100AO
[Connecting control input terminals to the TT-104B program timer]
Since the SX-2000Ao's or SX-2100Ao's control inputs are photo coupler inputs, they need a power supply.
Power can be supplied to the photo couplers using the SX-2000Ao's or SX-2100Ao's internal power supply, or
external power supply.
• When using the internal power supply, 2 power feed jumpers and 2 isolation jumpers are needed. Using 6P
removable terminal plugs equipped with jumpers, make connections as shown below:
TT-104B
OUTPUT CHANNEL (24 V DC 0.5 A)
BE SURE TO SET
THIS SWITCH TO “ON”
AFTER INSTALLATION
ON
MEMORY
BACK UP
CHANNEL
ASSIGNMENT
OFF
ON
OFF
CAUTION
SX-2100AO or SX-2000AO
(The figure below shows the SX-2100AO.)
OUTPUT CHANNEL (24 V DC 0.5 A)
Power Feed Jumper
Control input terminals
Power Feed Jumper
Isolation Jumper
Isolation Jumper Open voltage: Under 40 V DC
Short-circuit current: 2 mA
Cable: AWG22 – 28
twisted pair cable
6P removable terminal plugs
(supplied with the SX-2000AO
and SX-2100AO)
[Operation of power Feed Jumper and Isolation Jumper]
VCC
GND
- +
Power feed jumper
Photo coupler
Internal circuit
Isolation jumper
Control input