Page top


I/O Relay Terminal


Single Cable Connection to PLC Means Space is Saved and Less Control Panel Wiring is Required.

Coil Ratings (Common to Input/Output per Relay)

Rated voltage (V) Rated current (mA) Coil
Power consumption
50 Hz 60 Hz of rated voltage per Relay per 16 Relays
AC 100/(110) 8.2/- 7/7.7 8,700 80% max. 30% min. 105% 0.7 VA 11 VA
200/(220) 4.1/- 3.5/3.85 33,300
DC 12 42 290 80% max. 10% min. 105% 0.5 W 8 W
24 21 1,150
100/110 5 20,000

Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with a tolerance of 15%/
              -20% for AC rated current and ±15% for coil resistance.
           2. The operating characteristics are measured at a coil temperature of 23°C.
           3. The value for maximum voltage is the maximum value within the allowable voltage fluctuation range for the
                 relay coil’s operating power supply. Continuous operation at this voltage is not within product specifications.
           4. Approx. 4 mA flows into each LED indicator. To calculate the power supply capacity, add the current value of
                 each LED indicator.
           5. When the G7TC is used with an AC rated voltage, three rated currents can be used. If a coil voltage of 110 or
                 220 VAC is used, 50 Hz cannot be used.

Contact Ratings (G7T I/O Relay)

Classification For input For output
Resistive load
Inductive load
(cosφ=0.4 L/R=7 ms)
Resistive load
Inductive load
(cosφ=0.4 L/R=7 ms)
Rated load 1 A at 24 VDC 0.5 A at 24 VDC 2 A at 220 VAC
5 A at 24 VDC
1 A at 220 VAC
2 A at 24 VDC
Rated carry
1A 5A
Max. switching
250 VAC, 125 VDC
Max. switching
1A 0.5A 5A 2A
Error rate
(reference value)
100 μA at 1 V 10 mA at 5 V
10,000,000 operations
(at 10 mA)
50,000 operations (at 1 A)
2,500,000 operations
(at 10 mA)
20,000 operations (at 1 A)
1,000,000 operations (under rated load)
50,000,000 operations

* The above values are for a switching frequency of 120 operations/min.


Model G7TC-IA16
(Input, AC coil)
(Input, DC coil)
(output, DC coil)
(output, DC coil)
Contact form SPST-NO × 16 SPST-NO × 8
Contact mechanism Bifurcated crossbar contact Single contact
Contact material Au cladding + Ag AgInSn
Contact resistance *1 50 mΩ max.
Must Operate time *2 15 ms max.
Release time *2 15 ms max.
Max. switching
Mechanical limit 18,000 operations/h
At rated load 1,800 operations/h
Insulation resistance 100 MΩ (at 500 VDC)
Between coil
and contact
2,000 VAC, 50/60 Hz for 1 minute
Between same
polarity contacts
1,000 VAC, 50/60 Hz for 1 minute
Between paired
connectors *3
250 VAC, 50/60 Hz for 1 minute
Vibration resistance 10 to 55 to 10 Hz with 0.5-mm single amplitude (1.0-mm double amplitude)
Shock resistance 200 m/s2
Noise immunity Noise level: 1.5 kV; pulse width: 100 ns to 1μs
Rated voltage between positive
and negative terminal blocks
Rated voltage of controller's
(PLC or other) input circuit
12 VDC ±5%
24 VDC ±5%
Rated current between positive
and negative terminal blocks
Input circuit current of controller
(PLC or other) × number of ON points
12 VDC: 46 mA × number of ON points
24 VDC: 25 mA × number of ON points
Cable length
To controller 5 m max. (reference value)
To I/O devices 50 m max. (reference value, for
2-mm2 CVV cable)
Dependent on load
Ambient operating temperature 0 to 55°C
Ambient operating humidity 35% to 85% (with no icing or condensation)
Tightening torque for external connections 0.78 to 1.18 Nm
Tensile strength No damage when a tensile force of 49 N is applied in each direction.
In the direction of the track, the tensile strength is 9.8 N min.
I/O terminal tightening torque Tightening strength: 0.98 Nm; Tensile strength 49 N per minute
LED color Red Green
Case color Transparent red Transparent green Transparent green
Coil surge absorber Varistor Diode (1 A, 1,000 V)
Weight Approx. 640 g Approx. 630 g Approx. 670 g Approx. 350 g

Note: The above values are initial values.
*1. Measurement: 1 A at 5 VDC.
*2. Ambient temperature: 23°C.
*3. This is between connector pin No. 10 and 20, and between connector pin No. 9 and 19.
*4. Connecting cables up to 5 m are available as standard products. For longer cables, enquire separately.

UL and CSA Standards

Standard G7TC I/O Relay Terminal, except for the G7TC-OC16-1 and the G7TC-OC08, have met UL and CSA standards (UL file no. E95399; CSA file no. LR35535).
Note that the following UL- and CSA-qualifying ratings differ from the performance characteristics of the individual models:

Model Coil ratings Contact ratings
G7TC-ID16, G7TC-IA16 10 mA/point, 24 VDC 250 VAC max.
G7TC-OC16 Coil drive current, 24 VDC Inductive load: 10 A, 250 VAC
Resistive load: 10 A, 30 VDC
Rated horsepower: 1/2 HP, 240 VAC

Accessories (Order Separately)



Contact resistance 10 mΩ max. (measured at 5 V DC, 1 A)
Dielectric strength 2,000 VAC for 1 minute
Insulation resistance 1,000 MΩ min. (at 500 V)
Vibration resistance 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)
Shock resistance 1,000 m/s2
Ambient temperature Operating: -40 to 70°C (with no icing or condensation)
Ambient humidity 5% to 85%
Weight Approx. 28 g