YASKAWA 87899-11100

Part Name：87899-11100 | Yaskawa Motoman Explosion-Proof Robot Manipulator Absolute Encoder Lithium Battery Assembly

> Applicable Robot Series：MPX Series Explosion-Proof Painting Robots（MPX1150 / MPX2600 Explosion-proof Version）

> Item Description：Absolute Encoder Backup Battery Assembly (Special Explosion-Proof Certified Unit)

Core Electrical Specifications

Nominal Voltage：3.6V DC (Lithium Thionyl Chloride, Non-rechargeable Primary Battery)

Construction：Integrated dedicated explosion-proof housing + cable & connector assembly

Function：Retain home position data of multi-turn absolute encoders for all robot axes during power failure

Standard Service Life (OEM)：Approx. 24,000 operating hours / 3～5 years

Safety Warning：Non-explosion-proof ordinary battery is strictly prohibited for substitution on explosion-proof robots

Critical Model Distinction (Common Mix-up Risk)

1. 87899-11100 = Explosion-proof manipulator battery for MPX painting robots (Explosion-proof certified component)
2. General-purpose battery for GP/MH standard robots：HW1483880-A

⚠️ Different housing, connector and explosion protection rating; NOT INTERCHANGEABLE！

Mandatory Battery Replacement Specifications (Hard Rules for Explosion-proof Equipment)

1. Jog robot to safe home position before replacement; Keep robot controller powered ON during replacement to avoid home position data loss
2. Only genuine OEM part 87899-11100 is permitted; modification using ordinary battery packs is forbidden
3. Ensure sealing gasket on battery compartment cover remains intact; tighten bolts with specified torque to preserve explosion-proof enclosure integrity
4. Waste lithium batteries are Class 9 Dangerous Goods; dangerous goods declaration is required for air & sea freight shipments

Typical Failure Symptoms of Aged Battery

Teach pendant alarm：Encoder Backup Battery Low / Home Position Data Lost

All axes require full mastering after robot power cycle

Low-temperature environment tends to trigger the battery alarm prematurely

Supplementary Selection Remarks

If you are also sourcing JRMSI-120XBP01000 (GL120 PLC Backplane Base)：

These two items belong to completely separate product lines：

JRMSI = MEMOCON GL120 legacy PLC rack

87899-11100 = Motoman MPX explosion-proof painting robot spare part

YASKAWA 87899-11100 Full Technical Datasheet

Applicable Equipment：MOTOMAN MPX1150 / MPX2600 Explosion-Proof Painting Robot Manipulator Absolute Encoder Battery Assembly (Matched with DX200 Controller)

⚠️ Critical spare part for hazardous area installation. Direct replacement with ordinary robot battery HW1483880-A is forbidden

1. Connector Pin Assignment (3-pin Circular Military Connector, View from Male Connector Front Face)

Connector Type：3-core circular aviation connector with anti-reverse lug

> Important Notes：

1. Internal cell：Lithium Thionyl Chloride battery, 3.6V, non-rechargeable
2. Only Pin1 & Pin2 carry power supply; Pin3 serves solely for shielding grounding
3. Anti-reverse lug built on connector; cannot be forcibly inserted in reversed orientation
4. Standard factory cable length：approx. 350 mm
5. Battery Compartment Installation Location Description

MPX2600 Explosion-proof Robot

Mounting Position：Independent explosion-proof battery compartment at rear side of J1 axis base, beside main cable outlet

Identification Feature：Square metal cover secured by 4 hex socket bolts; yellow EX explosion-proof warning label affixed on cover.

MPX1150 Explosion-proof Robot

Mounting Position：Side of J1 axis base, inside cable protection shroud

Remove cable guard to access battery compartment; do not pull encoder main cable violently.

Structural Installation Key Points：

Rubber sealing gasket fitted inside compartment (maintains integrity of Ex explosion-proof construction)

Install complete battery assembly as one unit; disassembling housing to replace single cell is prohibited

Recommended tightening torque for cover bolts：1.8～2.2 N·m

3. Standard Replacement Procedure (Mandatory for Explosion-proof Unit, Prevent Home Position Loss)
4. Keep controller powered ON (Control Power ON, Servo OFF)

✅ Live replacement: Encoder temporary power is supplied from controller to preserve position data

❌ Unplug battery after complete power-off → 100% risk of home position loss, full-axis mastering mandatory

2. Remove battery compartment cover; clean accumulated dust & paint sludge (critical for painting workshop environment)
3. Disconnect old battery aviation plug, rapidly connect brand-new 87899-11100
4. Confirm connector fully locked, arrange cable routing to avoid squeezing
5. Inspect sealing gasket for damage or displacement; refit cover and tighten bolts evenly in diagonal sequence
6. Reset Encoder Battery Low alarm on teach pendant; jog all axes to verify positioning accuracy

> Hard Restrictions：

Do not commission robot in hazardous area if gasket missing or damaged

Do not cut open OEM explosion-proof housing to replace internal cells

Do not extend cable length or modify connector pin definition

4. Visual Differentiation: Genuine OEM vs Aftermarket Substitute

Genuine OEM Features

1. Black explosion-proof housing, model number 87899-11100 YASKAWA moulded integrally on casing, crisp marking without burrs
2. Yaskawa logo printed on connector shell; evenly gold-plated contact pins
3. Cable jacket resistant to solvent attack (resists cracking from paint & thinner in painting environment)
4. Tight housing joint without glue overflow; laser-etched cell production date on housing side
5. Supplied in original anti-static packaging bag

Typical Defects of Copy / Generic Substitute

1. Model printed via adhesive sticker instead of integrated mould marking
2. Loose connector mating, poor anti-reverse fit
3. Cable sheath intolerant to xylene & thinners, prone to cracking within short service period
4. Shield wire not connected to Pin3 → loss of explosion-proof grounding
5. Accelerated voltage decay; battery low alarm recurs within 3～6 months
6. Common Fault Diagnosis
7. Teach pendant alarm：Encoder Backup Battery Low Voltage

→ Battery internal resistance rises; arrange immediate replacement. Temporary operation is possible, yet high risk of position loss after power shutdown.

2. Home Position Not Established for All Axes after Reboot

→ Battery fully depleted OR battery removed under power-off state; full-axis mastering is required.

3. Paint ingress / moisture penetration into connector → internal short-circuit, rapid battery drain

Regular inspection of compartment sealing is advised for painting production lines.

6. Storage & Transportation Guidelines

Storage Temperature：-20℃～+45℃; avoid prolonged high-temperature exposure

Waste lithium thionyl chloride batteries are Class 9 Dangerous Goods, dangerous goods declaration required for bulk logistics

Prevent short-circuit of terminals during shelf storage; fit protective cap onto unused connector