10. Interfaces
10.1 Hardware
The CT-T1 contains four hardware interfaces depicted.
10.1.1. USB
The USB interface consists of a Master and a Slave connector.
The Master connector can be used to update the device and store/load measurement data from
USB memory sticks.
USB-Master (Typ A)
USB-Slave (Typ B)
Pin
Signal
2
TxD (CT-T1
⇒ Host)
3
RxD (Host
⇒ CT-T1)
5
GND
10.1.2. RS-232
The 9-pin RS-232 interface integrated into the CT-T1 can be used with the Raytech Software
Development Kit (SDK) described in Appendix B on page 55 or to directly control the device using
the command syntax described in Appendix C on page 56.
The interface parameters are listed in Table.
These parameters are fixed and not changeable.
Port
RS-232
Datarate
38400 bit/s
Databit
8 bit
Stopbits
1 bit
Parity
No
90225-1.30 Instruction Manual CT-T1
Page 50 of 62
10.1.3. Surveillance
The Surveillance switch is a safety precaution to unlock dangerous output voltages. The operator
has to press the switch as long as the output voltage is above 50V.
Pin
Signal
1
Surveillance switch normally open
2
Surveillance switch normally open
3
Not connected
4
Not connected
Connector in the
instrument Lemo:
ERA.1E.304.CLL
(RAN: 40894)
Extern Lemo:
FFA.1E.304.CLAC60
(RAN: 40895)
90225-1.30 Instruction Manual CT-T1
Page 51 of 62
Appendix
90225-1.30 Instruction Manual CT-T1
Page 52 of 62
CT-T1
CURRENT TRANSFORMER TESTER
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