Datasheet

KT(AKT2)
2
■ PRODUCT TYPES
1. KT2 Series
* When heating/cooling is selected, alarm output 1 cannot be used.
When the communication function is selected, alarm output 2 cannot be used.
• Part No.
(Ex) Part No. when the optional functions (of Heating/Cooling control: relay contact output + Communications function) is added on to
the basic model are as follows; Part No.: AKT21110101
• Options
Note: When Current input is specified, a shunt resistor (sold separately) is required.
Base
model
Power
supply
Sensor
input
Control
output
Alarm
output
Heating/
cooling
control
Heater
burnout
alarm
Communi-
cation
function
Description
AKT2 48 × 24 × 98.5mm
1 100 to 240V AC
2 24V AC/DC
1 Multi-input
1 Relay contact output
2 Non-contact voltage output
3 Current output
2 0 0 Blank
When both heating/cooling and communication
functions are not added:
Relay contact output (alarm 1): Can be used
Open collector output (alarm 2): Can be used
1 1 0 Blank
When only heating/cooling function is added:
Relay contact output (alarm 1): Cannot be used
Open collector output (alarm 2): Can be used
1001
When only communication function is added:
Relay contact output (alarm 1): Can be used
Open collector output (alarm 2): Cannot be used
0101
When both heating/cooling and communication
functions are added:
Relay contact output (alarm 1): Cannot be used
Open collector output (alarm 2): Cannot be used
Product name Part No.
Shunt resistor (for Current input) AKT4810
Terminal cover AKT2801
■ Communication Function Overview
Item
Specification
Communication type Half-duplex
Communication speed Select 2400, 4800, 9600, or 19200 bps using key operation.
Synchronization type Asynchronous
Protocol Modbus
Coding ASCII
Error correcting Command re-send
Error detection Parity check, check sum
Data structure
Start bit: 1
Data bit: 7
Parity: Even parity
Stop bit: 1
Interface RS485 compliant
No. of nodes 31
Maximum cable length 1,000 m (cable resistance must be within 50 Ω )