Theta Controller User Manual

4.1.3 Theta Controller Serial Connector
User Manual
Theta Controllers have two male DB-9 connector. The function of COM port 2 serial connector is
assignable, see section 3. COM port 1 allows a connection to a laptop computer for access to
Embedded Toolbox software. The connection between the computer and the controller is a simple
null-modem cable. Only pins 2, 3 and 5 are active on this connector.
DB-9 Connector Pins
Pin Function
2 Receive Data
3 Transmit Data
5 Signal Ground
4.1.4 Theta Controller Input and Output Connector
All four inputs and four outputs are optically isolated 24VDC. The Theta has an internal 24VDC
power supply that can be used to provide the I/O signals. An external 24VDC power supply may
be used instead. The following are the amperage ratings depending on the power supply used:
• Internal 24VDC supply: Maximum = 1 ampere total
• External 24VDC supply: Maximum = 1 ampere per output
The Theta controller’s Input circuits conform to the IEC 61131-2 standard for PLCs.
Rated
Voltage
Type
Of
Limit
LIMITS per IEC 61131-2
Type 2 limits
State 0 Transition State 1
V low I low V trans I trans V high
(v) (ma) (v) (ma) (v)
Max 5 30 11 30 30 30
24 volt
Min -3 ND 5 2 11 6
I high
(ma)
The Theta controller has a terminal block connector for error proofing. Error proofing in the Theta
controller is based on simple bolt counting with Poki-Oki.
NOTE:
One I/O mating connector (P/N 21C104800) is included with each Theta controller
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