TOHO ELECTRONICS TTM-339 - Manual (Page 7)

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3. Terminal connection diagram
Power supply
100 to 240 VAC
① Ｘ A
Communications RS-485
⑬

EV4
Open collector
output
② B ⑭

TS1
Not in use ③ Pattern 1
No-voltage
contact input
⑮

TS2
OUT1
(Relay/SSR/4 -20
mADC)

C
④
Pattern 2
⑯

TS3

NO
⑤
Pattern 3
⑰

TS4
OUT2(None/Relay/
SSR/
4 -20 mADC)

C
⑥
Pattern 4
⑱

TIME

NO
⑦
RUN/RDY
⑲

COM
Not in use
⑧ Operation
switchover
⑳
CT input
Relay contact
output
EV1 ⑨ Step feed
EV2 ⑩ COM
Sensor input
* See below.
EV3 ⑪ END signal Relay contact
output COM ⑫ Ｙ COM
RTD TC/10 mV Current/voltage
b 
B
 
A 
Precautions on wiring
Warning
Do not turn on the power until all wiring is complete in order to prevent an electric shock
or equipment failure.
★ For inputs from a thermocouple, use the specified wires or compensating leads.
★ For inputs from a resistance temperature detector, use wires that the wire resistance of leads is small and no resistance difference
is present among 3 wires (3-wire type).
★ Provide input signal lines distant from power supply lines, power lines or load lines so as not to affect input signal lines with
noise induction.
★ Wire the power supply for instruments such that they do not receive noises from the power supply for power devices.
The use of a noise filter is recommended in case that the equipment is vulnerable to noises.
Take care the following when a noise filter is used.
◎ Install the noise filter as close to a temperature controller as possible.
Wire the instruments in as short a distance as possible to output lines (secondary side) of the noise filter and power
terminals for the temperature controller.
◎ Isolate the noise filter input line (primary side) from its output line (secondary side).
High-frequency elements of noises may be induced, resulting in no provision of much noise attenuation effect as expected,
in case of input and output wires being close one another, such as being bundled together or installed in a same duct or
tube.
◎ Wire the grounding wire of the noise filter in as short a distance as possible.
A long grounding wire is equivalent to insert of an inductance, resulting in deteriorated high-frequency characteristics.
◎ Before installing the noise filter, peel off the paint applied on a mounting plate of the noise filter as appropriate, in order to
reduce the contact resistance between the noise filter and equipment housing.
★ For the power supply, use and twist wires that cause less voltage drop.
★ For the equipment being activated, it takes about 4 seconds after its power turns on. Use delay relays when using the
equipment for generating signals for interlocking circuits.
★ The equipment is not attached with power supply switch fuses. Separately install fuses in proximity of the equipment, as
needed.
◎ Recommended fuse rating: Rated voltage of 250 V and rated current of 1 A
★ Use crimping terminals that match screw sizes.
◎ Size of crimping terminal: Terminal width of 6 mm or smaller
Crimping terminal recommended
Manufacturer: NICHIFU
Model: ICTV-1.25Y-3N (Y terminal)
ICTV-1.25-3S (round terminal)
◎ Tightening torque recommended: 0.5 N

m
◎ Applicable wire
Use wires in sizes suitable for the terminals.