Output Modules

Allen Bradley SLC 500 Input/Output Modules

Allen-Bradley offers both discrete (digital) and analog Input and Output modules of various capabilities. The digital Input/Output modules feature a discrete signal that is either on or off, such as the input of limit switches or the output signal to a relay. Conversely, analog Input/Output modules convert voltage or current to point-in-time values via the processor, such as the input received by a thermocouple or the output signal of a pressure regulator. Virtually all SLC 500 Systems will incorporate the use of both discrete and analog Input and Output modules.

The SLC 500 System delineates between the various discrete modules by sorting them into two categories: Sinking and Sourcing. As an engineer designing your own system it will help you to understand the difference between these two options. Here is the definition as given by Allen-Bradley:

"Sinking and Sourcing are terms used to describe a current signal flow relationship between field input and output devices in a control system and their power supply.

Field devices connected to the positive side (+V) of the field power supply are sourcing field devices.
Field devices connected to the negative side (DC Common) of the field power supply are called sinking field devices.

To maintain electrical compatibility between field devices and the programmable controller system, this definition is extended to the input/output circuits on the discrete I/O modules.

Sourcing I/O circuits supply (source) current to the sinking field devices.
Sinking I/O circuits receive (sink) current from sourcing field devices.

Europe: DC sinking input and sourcing output module circuits are the commonly used options"

The following tables will help you to compare the Discrete Input/Output modules available in the Allen-Bradley SLC 500 System as well as the Analog Input/Output modules:

Discrete Sinking DC Input Modules

PART NUMBER	1746-IB8	1746-IB16	1746-IB32	1746-IC16	1746-IH16	1746-ITB16
# OF INPUTS	8	16	32	16	16	16
POINTS/COMMON	8	16	8	16	16	16
VOLTAGE	24V DC	24V DC	24V DC	48V DC	125V DC	24V DC
OPERATING VOLTAGE RANGE	10-30V DC	10-30V DC	15-30VDC (50°C) 15-26.4VDC (60°C)	30-60V DC (55°C) 30-55V DC (60°C)	90-146V DC	10-30V DC
CURRENT AT 5V	50mA	50mA	50mA	50mA	50mA	50mA
CURRENT AT 24V	0 mA	0 mA	0 mA	0 mA	0 mA	0 mA
VOLTAGE, OFF-STATE INPUT, MAX.	5.0V DC	5.0V DC	5.0V DC	10.0V DC	20.0V DC	5.0V DC
NOMINAL INPUT CURRENT	8 mA @ 24V DC	8 mA @ 24V DC	5.1 mA @ 24V DC	4.1 mA @ 48V DC	2.15 mA @ 125VDC 2.15 mA @ 132V DC	8 mA @ 24V DC
CURRENT, OFF-STATE INPUT, MAX.	1 mA	1 mA	1.5 mA	1.5 mA	0.8 mA	1.5 mA
SUGNAL ON DELAY, MAX.	8 ms	8 ms	3 ms	4 ms	9 ms	0.30 ms
SIGNAL OFF DELAY, MAX.	8 ms	8 ms	3 ms	4 ms	9 ms	0.50 ms

Discrete Sourcing DC Input Modules

PART NUMBER	1746-IG16	1746-IV8	1746-IV16	1746-IV32	1746-ITV16
# OF INPUTS	16	8	16	32	16
POINTS/COMMON	16	8	16	8	16
VOLTAGE	5V DC	24V DC	24V DC	24V DC	24V DC
OPERATING VOLTAGE RANGE	4.5-5.5 V DC	10-30V DC	10-30V DC	15-30V DC (50°C) 15-26.4V DC (60°C)	10-30V DC
CURRENT AT 5V	140 mA	50 mA	85 mA	50 mA	85 mA
CURRENT AT 24V	0 mA	0mA	0 mA	0 mA	0 mA
VOLTAGE, OFF-STATE INPUT, MAX.	2-5.5V DC	5.0V DC	5.0V DC	5.0V DC	5.0V DC
NOMINAL INPUT CURRENT	3.7 mA @ 5V DC	8 mA @ 24V DC	8 mA @ 24V DC	5.1 mA @ 24V DC	8 mA @ 24V DC
CURRENT, OFF-STATE INPUT, MAX.	4.1 mA	1 mA	1 mA	1.5 mA	1.5 mA
SIGNAL ON DELAY, MAX.	0.25 ms	8 ms	8 ms	3 ms	0.30 ms
SIGNAL OFF DELAY, MAX.	0.50 ms	8 ms	8 ms	3 ms	0.50 ms

Discrete Sinking DC Output Modules

PART NUMBER	1746-OG16	1746-OV8	1746-OV16	1746-OV32	1746-OVP16
# OF OUTPUTS	16	8	16	32	16
POINTS/COMMON	16	8	16	16	16
VOLTAGE	5V DC	24V DC	24V DC	24V DC	24V DC
OPERATING VOLTAGE RANGE	4.5-5.5V DC	10-50V DC	10-50V DC	5-50V DC	20.4-26.4V DC
CURRENT @ 5V	180 mA	135 mA	270 mA	190 mA	250 mA
CURRENT @ 24V	0 mA	0 mA	0 mA	0 mA	0 mA
VOLTAGE DROP, ON-STATE OUTPUT, MAX.	–	1.2 V @ 1.0 A	1.2 V @ 0.5 A	1.2V @0.5 A	1.0 V @ 1.0 A
LOAD CURRENT, MIN.	0.15 mA	1 mA	1 mA	1 mA	1 mA
LEAKAGE CURRENT, OFF-STATE OUTPUT, MAX.	0.1 mA	1 mA	1 mA	1 mA	1 mA
SIGNAL ON DELAY, MAX. (RESISTIVE LOAD)	0.25 ms	0.1 ms	0.1 ms	0.1 ms	0.1 ms
SIGNAL OFF DELAY, MAX. (RESISTIVE LOAD)	0.50 ms	1.0 ms	1.0 ms	1.0 ms	1.0 ms
CONTINUOUS CURRENT PER MODULE	N/A	8.0 A (30°C) 4.0 A (60°C)	8.0 A (30°C) 4.0 A (60°C)	8.0 A (0-60°C)	6.4 A (0-60°C)
CONTIUOUS CURRENT PER POINT	24 mA	1.0 A (30°C) 0.5 A (60°C)	0.50 A (30°C) 0.25 A (60°C)	0.50 A (30°C) 0.25 A (60°C)	1.5 A (30°C) 1.0 A (60°C)
SURGE CURRENT PER POINT FOR 10 ms	N/A	3.0 A	3.0 A	1.0 A (30°C) 1.0 A (60°C)	4.0 A+

Discrete Sourcing DC Output Modules

PART NUMBER	1746-OB6EI	1746-OB8	1746-OB16	1746-OB16E	1746-OB32	1746-OB32E	1746-OBP8	1746-OBP16
# OF OUTPUTS	6 EP	8	16	16 EP	32	32 EP	8	16
POINTS/ COMMON	IND. ISOLATED	8	16	16	16	16	4	16
VOLTAGE	24V DC	24V DC	24V DC	24V DC	24V DC	24V DC	24V DC	24V DC
OPERATING VOLTAGE RANGE	10-30 V DC	10-50V DC	10-50V DC	10-30V DC	5-50V DC	10-30V DC	20.4-26.4V DC	20.4-26.4V DC
CURRENT @ 5V	46mA	135 mA	280 mA	135 mA	190 mA	190 mA	135 mA	250 mA
CURRENT @ 24V	0 mA	0 mA	0 mA	0 mA	0 mA	0 mA	0 mA	0 mA
VOLTAGE DROP. ON-STATE OUTPUT, MAX.	1.0V @ 2.0 A	1.2V @ 1.0 A	1.2V @ 0.5A	1.0V @ 0.5 A	1.2V @ 0.5 A	1.2V @ 0.5 A	1.0V @ 2.0 A	1.0V @ 1.0 A
LOAD CURRENT, MIN.	1 mA	1 mA	1 mA	1 mA	1 mA	1 mA	1 mA	1 mA
LEAKAGE CURRENT, OFF-STATE OUTPUT. MAX.	1 mA §	1 mA §	1 mA §	1 mA §	1 mA	1 mA	1 mA §	1 mA §
SIGNAL ON DELAY, MAX. (RESISTIVE LOAD)	1.0 ms	0.1 ms	0.1 ms	1.0 ms	0.1 ms	1.0 ms	1.0 ms	0.1 ms
SIGNAL OFF DELAY, MAX. (RESISTIVE LOAD)	2.0 ms	1.0 ms	1.0 ms	1.0 ms	1.0 ms	2.0 ms	2.0 ms	1.0 ms
CONTINUOUS CURRENT PER MODULES	12.0 A (0-60°C)	8.0 A (30°C) 4.0 A (60°C)	8.0 A (30°C) 4.0 A (60°C)	8.0 A (0-60°C)	8.0 A (0-60°C)	8.0 A (0-60°C)	8.0 A (0-60°C)	6.4 A (0-60°C)
CONTINUOUS CURRENT PER POINT	2.0 A (0-60°C)	1.0 A (30°C) 0.50 A (60°C)	0.50 A (30°C) 0.25 A (60°)	1.0 A (30°) 0.50 A (60°C)	0.50 A (30°C) 0.25 A (60°C)	0.50 A (30°C) 0.25 A (60°C)	2.0 A (0-60°C)	1.5 A (30°C) 1.0 A (60°C)
SURGE CURRENT PER POINT FOR 10 ms	4.0 A	3.0 A	3.0 A	2.0 A	1.0 A (30°C) 1.0 A (60°C)	1.0 A (30°C) 1.0 A (60°C)	4.0 A	4.0 A

Discrete AC Input Modules

PART NUMBER	1746-IA4	1746-1A8	1746-IA16	1746-IM4	1746-IM8	1746-IM16	1746-IN16
# OF OUTPUTS	4	8	16	4	8	16	16
POINTS/ COMMON	4	8	16	4	8	16	16
VOLTAGE	100/120 VAC	100/120 VAC	100/120VAC	200/240VAC	200/240VAC	200/240VAC	24V AC/DC
OPERATING VOLTAGE RANGE	85-132V @ 47-63 HZ	85-132V @ 47-63 HZ	85-132V @ 47-63 HZ	170-265 V @ 47-63 HZ	170-265 V @ 47-63 HZ	170-265 V @ 47-63 HZ	10-30VAC 10-30VDC
CURRENT @ 5V	35 mA	50 mA	85 mA	35 mA	50 mA	85 mA	85 mA
CURRENT @ 24V	0 mA	0 mA	0 mA	0 mA	0 mA	0 mA	0 mA
VOLTAGE, OFF-STATE INPUT, MAX.	30 VAC	30 VAC	30 VAC	50 VAC	50 VAC	50 VAC	3.0 VDC 3.0 VAC
NOMINAL INPUT CURRENT	12 mA @ 120 VAC	12 mA @ 120 VAC	12 mA @ 120 VAC	12 mA @ 240 VAC	12 mA @ 240 VAC	12 mA @ 240 VAC	8 mA @ 24 VDC 8 mA @ 24 VAC
CURRENT, OFF-STATE INPUT, MAX.	2 mA	2 mA	2 mA	2 mA	2 mA	2 mA	1 mA (DC) 1 mA (AC)
INRUSH CURRENT, MAX.	0.8 A	0.8 A	0.8 A	1.6 A	1.6 A	1.6 A	0.02 A (AC ONLY)
INRUSH CURRENT TIME DURATION MAX.	0.5 ms	0.5 ms	0.5 ms	0.5 ms	0.5 ms	O.5 ms	--
SIGNAL ON DELAY, MAX.	35 ms	35 ms	35 ms	35 ms	35 ms	35 ms	15 ms (DC) 25 ms (AC)
SIGNAL OFF DELAY, MAX.	45 ms	45 ms	45 ms	45 ms	45 ms	45 ms	15 ms (DC) 25 ms (AC)

Discrete AC Output Modules

PART NUMBER	1746-OA8	1746-OA16	1746-OAP12
# OF OUTPUTS	8	16	12
POINTS/COMMON	4	8	6
VOLTAGE	120/240 VAC	120/240 VAC	120/240 VAC
OPERATING VOLTAGE RANGE	85-265 VAC @ 47-63Hz	85-265 VAC @ 47-63Hz	85-265 VAC @ 47-63Hz
CURRENT @ 5V	185 mA	370 mA	370 mA
CURRENT @ 24V	0 mA	0 mA	0 mA
VOLTAGE DROP, ON-STATE OUTPUT, MAX.	1.50 V @ 1.0 A	1.50 V @ 0.50 A	1.2 V @ 2.0 A
LOAD CURRENT, MIN.	10 mA	10 mA	10 mA
LEAKAGE CURRENT, OFF-STATE OUTPUT, MAX.	2 mA	2 mA	2 mA
SURGE CURRENT PER POINT	10.0 A for 25 ms	10.0 A for 25 ms	17.0 A for 25 ms
SIGNAL ON DELAY, MAX. (RESISTIVE LOAD)	1 ms	1 ms	1 ms
SIGNAL OFF DELAY, MAX. (RESISTIVE LOAD)	11 ms	11 ms	11 ms
CONTINUOUS CURRENT PER POINT	1.0 A @ 30° C 0.50 A @ 60° C	0.50 A @ 30° C 0.25 A @ 60° C	2.0 A @ 30 ° C 1.25 A @ 55° C 1.0 A @ 60° C
CONTINUOUS CURRENT PER MODULE	8.0 A @ 30° C 4.0 A @ 60° C	8.0 A @ 30° C 4.0 A @ 60° C	9.0 A @ 30° C 6.0 A @ 60° C

Analog Input/Output Modules

PART NUMBER	FUNCTION	CURRENT/ VOLTAGE	I/O CHANNELS	DESCRIPTION
1746-NI4	INPUT	-20 TO + 20 mA -10 TO + 10 VDC	4	HIGH RESOLUTION INPUT CURRENT/VOLTAGE
1746-NI8	INPUT	-20 TO + 20 mA -10 TO + 10 VDC	8	HIGH RESOLUTION INPUT CURRENT/VOLTAGE
1746-NI16I	INPUT	-20 TO +20 mA	16	HIGH RESOLUTION INPUT CURRENT
1746-NI16V	INPUT	-10 TO +10 VDC	16	HIGH RESOLUTION INPUT VOLTAGE
1746-NIO4I	INPUT/OUTPUT	-20 TO + 20 mA or -10 TO + 10 VDC INPUT; 0 TO 20 mA OUTPUT	2 INPUT; 2 OUTPUT	HIGH RESOLUTION INPUT CURRENT/VOLTAGE; CURRENT OUTPUT
1746-NIO4V	INPUT/OUTPUT	-20 TO + 20 mA or -10 TO + 10 VDC INPUT; -10 TO +10 VDC OUTPUT	2 INPUT; 2 OUTPUT	HIGH RESOLUTION INPUT CURRENT/VOLTAGE; VOLTAGE OUTPUT
1746-FIO4I	INPUT/OUTPUT	0 TO 20 mA or 0 TO 10 VDC INPUT; 0 TO 20 mA OUTPUT	2 INPUT; 2 OUTPUT	FAST ANALOG INPUT; ANALOG CURRENT OUTPUT
1746-FIO4V	INPUT/OUTPUT	0 TO 20 mA or 0 TO 10 VDC INPUT; -10 TO +10 VDC OUTPUT	2 INPUT; 2 OUTPUT	FAST ANALOG INPUT; ANALOG VOLTAGE OUTPUT
1746-NO4I	OUTPUT	0 TO 20 mA	4	CURRENT OUTPUT
1746-NO4V	OUTPUT	-10 TO +10 VDC	4	VOLTAGE OUTPUT
1746-NO8I	OUTPUT	0 TO 20 mA	8	CURRENT OUTPUT
1746-NO8V	OUTPUT	-10 TO +10 VDC	8	VOLTAGE OUTPUT
1746-NT4	INPUT	60 mA / 5V 40 mA /24V	4 + CJC SENSOR	THERMOCOUPLE INPUT TYPES J, K, T, E, R, S, B, N
1746-NT8	INPUT	120 mA/5 V 70 mA/24 V	8 + CJC SENSOR	THERMOCOUPLE INPUT TYPES J, K, T, E, R, S, B, N
1746-INT4	INPUT	110 mA/5 V 85 mA/24 V	4 + CJC SENSOR	THERMOCOUPLE INPUT TYPES J, K, T, E, R, S, B, N, C, D
1746-NR4	INPUT	50 mA/5 V 50 mA/24 V	4	RTD/RESISTANCE INPUT
1746-NR8	INPUT	100 mA/5 V 55 mA/24 V	8	RTD/RESISTANCEINPUT
1746-HSCE	INPUT	DIFF: 0 TO 5 VDC; SE: ±5 VDC TO 30 VDC	1 SET ±A, ±B, ±Z DIFF; 5 VDC, 12 VDC, 24 VDC SE	HIGH SPEED COUNTER WITH DIFFERENTIAL (DIFF) OR SINGLE-ENDED (SE) INPUTS
1746-HSCE2	INPUT	5 VDC TO 30 VDC	2 SETS ±A, ±B,±Z; 2 ENCODERS; 4 PULSE DIFF OR SE	HIGH SPEED COUNTER WITH DIFF, SE, OR ENCODER INPUTS
1746-BLM	INPUT/OUTPUT	110mA/5 V	4 DIS/4 ANA INPUT; 4 DIS/4 ANA & 1 EXCITATION OUTPUT	BLOW MOLDING I/O WITH DISCRETE & ANALOG INPUTS/OUTPUTS
1746-BTM	INPUT	-50 TO +50 mV; -100 TO + 100 mV	4	BARREL TEMPERATURE MODULE
1746-HSTP1	INPUT/OUTPUT	200 mA/5 V	5 VDC DIFF/12-24 VDC SE INPUT; DIGITAL OUTPUT	STEPPER CONTROL MODULE
1746-HSRV	INPUT/OUTPUT	300 mA/5 V	3 INPUT 1 OUTPUT	SERVO CONTROL MODULE
1746-QV	INPUT/OUTPUT	250 mA/5 V	1 INPUT 1 OUTPUT	OPEN-LOOP VELOCITY MODULE/HYDRAULICS
1746-QS	INPUT/OUTPUT	1000 mA/5 V 200 mA/24 V	4 INPUT 4 OUTPUT	CLOSED LOOP SERVO POSITIONING FOR SYNCHRONIZED AXES

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