Appendix I E-3
External Interfaces
Setting the Software
If you ordered the “remote setpoint” option with the TCU, your TCU will come pre-configured to
accept a remote setpoint. This means that you will NOT be able to select a setpoint directly from
the temperature controller (without changing the default parameters). Additionally, the TCU comes
from the factory set to 0-20mA covering the entire range of 10°F to 260°F.
Remote Setpoint Related Parameters
U34 Remote setpoint enabled
rse ena
Disabled (lS) or Enabled (En)
U35 Remote setpoint type
rst nna
4-20mA (nn) or 0-10 Volts (u) (be sure to also
change jumpers)
U36 Remote setpoint high range
rsH 2
rSl to
U37 Remote setpoint low range
rS
- to rSH
Process Value Retransmit Analog Output:
If you ordered the “process value retransmit” communication option with the TCU, your TCU will
come pre-configured to accept a remote setpoint. This means that you will NOT be able to select a
setpoint directly from the temperature controller (without changing the default parameters). Addi-
tionally, the TCU comes from the factory set to 0-20mA covering the entire range of 10°F to 260°F.
Process Value Related Parameters
U38 Communications type
t rEt
OFF,
Retransmit (rEt),
ModBus-RTU (bUS),
ModBus-TCP (tcP), or
Handheld Remote (Hn)
NOTE: No SPI communications
U39 Retransmit type
rtt nn
4-20mA (nn) or 0-10 Volts (u)
U40 Retransmit high limit
rtH 2
rSl to
U41 Retransmit low limit
rt
- to rEH
Modbus RTU Communication
Connecting to the Thermolator
The Thermolator has a 2-wire (plus common) RS-485 network for Modbus communication.
Pin 4 T+/R+
Pin 5 T-/R-
DB-9 hood Common
Setting the Modbus Address and Speed
Modbus Related Parameters
U38 Communications type
t bUS
OFF,
Retransmit (rEt),
ModBus-RTU/TCP (bUS), or
Handheld Remote (Hn)
U42 Communications Baud Rate
bU
2 to
U43 Modbus ID
b
to 24
(Continued)
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